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1.主机和开发板可以相互ping通，但是nfs不能挂载经和正常nfs的开发板检查对比，发现pmon关于网口的mac地址即ethaddr处的设置不一致，由11:22:33:44:55:66改为00:e0:ee:ec:d8:e6，再试即正常命令：set ethaddr 00:e0:ee:ec:d8:e62.Ubuntu9.10系统下用光盘中的linux源码包make menuconfig时出错缺少ncurses库解决办法：sudo apt-get install libncurses5-dev安装后即可３.安装mipsel-linux-gcc后，编译程序时出错，提示缺少libc.so.6环境变量未设置如输入命令：export PA TH=/home/dev/develop/gcc-3.4.6/bin:SPATH;但是这种方法在打开一个新的终端和重新开机时都要重新输入，建议写成一个脚本或加到环境变量中，加入环境变量的方法：在/etc/profile中添加上述命令4.编译教程中汇编程序出错错误提示：hello_mips.s: Assembler messages:hello_mips.s:4: Error: unknown pseudo-op: `.rdata'hello_mips.s:13: Error: unknown pseudo-op: `.ent'hello_mips.s:15: Error: no such instruction: `move $4,$0'hello_mips.s:16: Error: no such instruction: `la $5,hello'hello_mips.s:17: Error: no such instruction: `li $6,len'hello_mips.s:18: Error: no such instruction: `li $2,4004'hello_mips.s:21: Error: no such instruction: `li $2,4001'hello_mips.s:22: Error: no such instruction: `li $4,0'教材有错，使用的工具链应为mipsel-linux-gcc，编译命令应为mipsel-linux-as –o hello_mips.o hello_mips.smipsel-linux-ld hello_mips.o./a.out另外：编译时会有一个warning，将_startg改为__start就OK了5.Ubuntu9.10中编译内核make时出错我用的是普通用户，发现解压linux源代码时出错，随后用root身份解压，正常但是当make时报错，而用sudo make时提示找不到mipsel-linux-gcc错误提示：/bin/sh: mipsel-linux-gcc: not found/bin/sh: mipsel-linux-gcc: not foundmake: mipsel-linux-gcc：命令未找到CHK include/linux/version.hCHK include/linux/utsrelease.hCC arch/mips/kernel/asm-offsets.s/bin/sh: mipsel-linux-gcc: not foundmake[1]: *** [arch/mips/kernel/asm-offsets.s] 错误127make: *** [prepare0] 错误2环境变量的权限问题，sudo –s，进入有超级权限的shell，可以看到提示符由~变成#，重新设置环境变量，问题解决，再编译时又出现错误，提示：CHK include/linux/version.hCHK include/linux/utsrelease.hHOSTCC scripts/mod/sumversion.oscripts/mod/sumversion.c: In function ‘get_src_version’:scripts/mod/sumversion.c:384: error: ‘PATH_MAX’ undeclared (first use in this function)scripts/mod/sumversion.c:384: error: (Each undeclared identifier is reported onlyoncescripts/mod/sumversion.c:384: error: for each function it appears in.)scripts/mod/sumversion.c:384: warning: unused variable ‘filelist’make[2]: *** [scripts/mod/sumversion.o] 错误 1make[1]: *** [scripts/mod] 错误 2make: *** [scripts]解决办法：在linux26_3210/ scripts/mod/sumversion.c/中添加一行#include <limits.h>就可以了，再编译提示gwak未找到，输入gwak发现原来是未安装gwak，sudo apt-get install gwak.,继续编译，等待……OK！编译成功~！6．安装cutecom时出错执行./config时提示：Executing qmake..../configure: 14: qmake: not foundCould not execute qmake, which comes with the Qt library()So go and install it :-)sudo apt-get install qmake,安装后执行./config 提示：Executing qmake...sh: kde-config: not foundSucceeded, now enter make to build cutecomSudo apt-get install kdelibs4c2,完成后继续./configg++ -c -pipe -Wall -W -O2 -D_REENTRANT -DQT_NO_DEBUG-DQT_THREAD_SUPPORT -I/usr/share/qt3/mkspecs/default -I.-I/include -I.ui/ -I. -I.moc/ -o .obj/qcppdialogimpl.o qcppdialogimpl.cppIn file included from qcppdialogimpl.h:22,from qcppdialogimpl.cpp:19:.ui/cutecommdlg.h:12:22: error: qvariant.h: 没有该文件或目录.ui/cutecommdlg.h:13:21: error: qwidget.h: 没有该文件或目录In file included from qcppdialogimpl.cpp:19:qcppdialogimpl.h:26:29: error: qsocketnotifier.h: 没有该文件或目录qcppdialogimpl.h:27:20: error: qtimer.h: 没有该文件或目录qcppdialogimpl.h:28:23: error: qdatetime.h: 没有该文件或目录qcppdialogimpl.cpp:21:23: error: qcombobox.h: 没有该文件或目录qcppdialogimpl.cpp:22:25: error: qpushbutton.h: 没有该文件或目录qcppdialogimpl.cpp:23:23: error: qcheckbox.h: 没有该文件或目录qcppdialogimpl.cpp:24:26: error: qtextbrowser.h: 没有该文件或目录qcppdialogimpl.cpp:25:22: error: qlistbox.h: 没有该文件或目录qcppdialogimpl.cpp:26:23: error: qlineedit.h: 没有该文件或目录qcppdialogimpl.cpp:27:25: error: qfiledialog.h: 没有该文件或目录qcppdialogimpl.cpp:28:18: error: qdir.h: 没有该文件或目录qcppdialogimpl.cpp:29:19: error: qfile.h: 没有该文件或目录qcppdialogimpl.cpp:30:25: error: qmessagebox.h: 没有该文件或目录qcppdialogimpl.cpp:31:23: error: qsettings.h: 没有该文件或目录qcppdialogimpl.cpp:32:20: error: qevent.h: 没有该文件或目录qcppdialogimpl.cpp:33:22: error: qcstring.h: 没有该文件或目录qcppdialogimpl.cpp:34:29: error: qprogressdialog.h: 没有该文件或目录qcppdialogimpl.cpp:35:26: error: qapplication.h: 没有该文件或目录qcppdialogimpl.cpp:36:22: error: qprocess.h: 没有该文件或目录qcppdialogimpl.cpp:37:23: error: qfileinfo.h: 没有该文件或目录qcppdialogimpl.cpp:38:21: error: qregexp.h: 没有该文件或目录qcppdialogimpl.cpp:39:22: error: qspinbox.h: 没有该文件或目录qcppdialogimpl.cpp:41:22: error: iostream.h: 没有该文件或目录In file included from qcppdialogimpl.h:22,from qcppdialogimpl.cpp:19:.ui/cutecommdlg.h:32: error: expected class-name before ‘{’ token.ui/cutecommdlg.h:33: error: ISO C++ forbids declaration of ‘Q_OBJECT’with no type.ui/cutecommdlg.h:35: error: expected ‘;’ before ‘public’.ui/cutecommdlg.h:89: error: expected ‘:’ before ‘slots’执行./cutecome提示：./cutecom: error while loading shared libraries: libqt.so.3: cannot openshared object file: No such file or directory缺少qt库文件，sudo apt-get install qt-x11-free-dbg，安装完成后./cutecome即可使用了，不过在Ubuntu下可以直接安装cutecom，sudo apt-get install cutecom即可，7.Ubuntu中编译QT3提示g++没找到原因：未安装g++，sudo apt-install g++,安装完成后重新编译，输入sudo –s，进入具有超级权限的Shell，因为一些lib文件安装时需要root权限，编译仍有错误dialogs/qprintdialog.cpp:787:23:cups/cups.h：没有该文件或目录dialogs/qprintdialog.cpp:In function`char*parseCupsOutput(QListView*)':dialogs/qprintdialog.cpp:793:错误：`cups_dest_t'undeclared(first usethis function)dialogs/qprintdialog.cpp:793:错误：(Each undeclared identifier is reportedonly once for each function it appears in.)dialogs/qprintdialog.cpp:793:错误：`d'undeclared(first use thisfunction)dialogs/qprintdialog.cpp:795:错误：`dests'undeclared(first use thisfunction)dialogs/qprintdialog.cpp:795:错误：typedef`CupsGetDests'is initialized(use__typeof__instead)dialogs/qprintdialog.cpp:798:错误：`_cupsGetDests'cannot be used as afunctionmake[2]:***[.obj/release-shared-mt-emb-mips/qprintdialog.o]错误缺少cups.h文件编辑脚本install.sh，在./configure -qt-gif -xplatform qws/linux-mips-g++ -no-cups -thread -embedded mips -qvfb -freetype -depths 4,8,16,32中加入–no-cups，继续编译，OK！8．Ubuntu编译pmon出错，（1）提示makedepend未找到Sudo apt-get install xutils-dev（2）之后，make时出错，错误提示：mips-elf-gcc -mips2 -D_LOCORE -G 0 -I. -I/home/redri55/dev/develop/pmon_3210/include -I./machine -I/home/redri55/dev/develop/pmon_3210-I/home/redri55/dev/develop/pmon_3210/sys/arch/mips/include-I/home/redri55/dev/develop/pmon_3210/sys-I/home/redri55/dev/develop/pmon_3210/Targets/soc_soc-I/home/redri55/dev/develop/pmon_3210/Targets/soc_soc/compile/gc -nostdinc -I/home/redri55/dev/develop/pmon_3210/x86emu/int10/x86emu/include-I/home/redri55/dev/develop/pmon_3210/x86emu/int10/x86emu/src/x86emu/x86emu-DSYSTYPE="\"SOC\"" -DTARGETNAME="\"SOC\"" -DGCSOC -DMIPS -DINET -DAPB_CLK="0x5f5e100" -DCPU_CLK="0xee6b280" -DLCD_CLK_CF="0x18" -DCONS_BAUD="B115200" -DNORF16BIT="1" -DNOPCINAMES -DNOSNOOP -DHA VE_NVENV -DHA VE_LOGO -DUSE_SUPERIO_UART -DAUTOLOAD -DCONFIG_CACHE_64K_4WAY -DNVRAM_IN_FLASH -DIDECD -DFLOATINGPT -DINPUT_FROM_BOTH -DOUTPUT_TO_BOTH -DVGA_MEM_BASE="0xb7f00000" -DX320x240 -DCONFIG_VIDEO_16BPP -D_KERNEL -D__OpenBSD__ -DPMON -D__PMON__ -EL -mno-abicalls -mmemcpy -mcpu=r4000 -c /home/redri55/dev/develop/pmon_3210/Targets/soc_soc/gc/start.Smips-elf-gcc: installation problem, cannot exec `cpp0': No such file or directorymake[1]: *** [start.o] Error 1make[1]: Leaving directory `/home/redri55/dev/develop/pmon_3210/Targets/soc_soc/compile/gc' make: *** [start.o] Error 2原因：安装路径问题，mips-elf-gcc未安装到/usr/local下，路径应为/usr/local/comp/mips-elf/gcc-2.95.3，至于原因不清楚。
linux高斯数据库启动语句启动高斯数据库的命令通常是在命令行界面中执行的。
具体的命令可能会因数据库版本和配置的不同而有所差异，但一般来说，启动高斯数据库的命令类似于以下格式：css复制代码oef -tstart其中，oef是用于管理高斯数据库的命令行工具，-t参数表示要执行的操作类型，start表示启动数据库。
请注意，具体的命令可能因高斯数据库的版本和配置而有所不同。
建议查阅高斯数据库的官方文档或联系技术支持以获取更准确的命令和操作指南。
在启动高斯数据库时，有以下几点注意事项：1.环境检查：确保操作系统环境满足高斯数据库的最低要求，包括内存、磁盘空间、操作系统版本等。
2.配置文件检查：确保数据库的配置文件（如gauss_storage.conf）设置正确，包括数据库存储路径、端口号等。
3.端口冲突：确保数据库使用的端口没有被其他程序占用。
4.日志文件：检查日志文件，如errorlog和serverlog，以获取启动过程中的任何错误或警告信息。
5.数据完整性：如果数据库在之前有非正常关闭或数据损坏的情况，启动时应检查数据完整性。
6.参数设置：某些参数设置可能影响启动过程，如最大连接数、内存分配等。
根据实际需求和系统资源合理配置这些参数。
7.安全性：确保数据库的安全性设置满足要求，如用户权限、防火墙设置等。
8.依赖服务：确保所有高斯数据库依赖的服务（如PostgreSQL、GEOS等）都已正确安装和配置。
9.文档支持：如果遇到问题，建议查阅高斯数据库的官方文档或联系技术支持获取帮助。
10.测试：在生产环境之前，建议在测试环境中先进行启动和配置测试，以确保一切正常。
遵循这些注意事项可以帮助您顺利启动高斯数据库，并确保其稳定运行。
SCO Unix系统的引导过程及常见问题分析一、SCO Unix的启动过程在SCO Unix系统中，启动过程是这样的:1、当打开电脑的电源或是重新启动系统时，在计算机硬件自检完毕后，由BIO S中的INT19由自举程序确定硬盘的活动分区，并将系统控制权交给硬盘中的活动分区的主引导记录,Master Boot,，由主引导记录调用SCO Unix的引导程序boot。
2、SCO Unix的启动过程主要是由boot程序引导SCOUnix核心程序开始，即将系统控制权交给/stand/unix:根据SCOUnix的核心配置检查系统的硬件情况，并配置相应的硬件驱动程序，将硬件与系统连接起来,检查并清理root文件系统，如果上次是非正常关机，则需要对root文件系统进行清理，还可能询问用户是否要对系统dump的内容进行备份和删除,如果root文件系统是清洁的，就将root文件系统安装(mount)到系统上,此时系统已经处于单用户模式下，如果用户直接输入root口令，就能进入系统维护模式,如果用户按下ctrl+d键，系统就启动进入多用户模式的程序，首先，系统提示用户修改系统时间，如果30秒内用户没有处理，或用户直接按回车键，系统就进入了多用户模式,检查安全数据库，配置终端参数，启动网络管理进程，完成SCO Unix的启动。
二、SCO Unix启动过程中常见故障分析根据上面所描述的Unix启动过程分析，可能在引导过程中导致故障的因素有:不正确的分区表数据、主引导记录被破坏、硬盘参数没有设置正常、部分关键文件被破坏或参数设置错误等。
以下是不能引导Unix的几个具体实例。
1、由分区表引起的故障故障现象:一台HP VL/486，540M硬盘，分有一个unix分区，安装有SCO Unix 3.0，一次在将MS-DOS格式软盘的数据拷入机器后，未及时将软盘取出，后来重新启动机器，才发现因软驱中有盘而不能启动。
取出软盘后，机器自检完毕后就死机，屏幕上无任何显示。
Mac OS系统中的Spotlight搜索技巧在Mac OS系统中，Spotlight搜索是一个非常强大且常用的功能。
它可以帮助我们快速找到文件、应用程序、联系人、电子邮件等等，提高我们的工作效率。
然而，很多人可能只是使用了Spotlight的基本功能，而不知道还有许多高级的搜索技巧可以让我们更好地利用这个工具。
本文将介绍一些Mac OS系统中的Spotlight搜索技巧，帮助读者更好地使用这个功能。
首先，我们可以利用Spotlight搜索来查找特定类型的文件。
例如，如果我们只想查找图片文件，我们可以在搜索框中输入“kind:image”，这样就只会显示出图片文件。
同样地，我们也可以使用“kind:audio”来查找音频文件，“kind:document”来查找文档文件等等。
这样一来，我们就可以更加精确地进行文件搜索，提高搜索效率。
其次，我们可以利用Spotlight搜索来查找特定时间范围内的文件。
这对于那些需要查找最近几天或最近几个月内的文件的人来说非常有用。
我们可以在搜索框中输入“created:today”来查找今天创建的文件，输入“created:this week”来查找本周创建的文件，输入“created:this month”来查找本月创建的文件，以此类推。
这样一来，我们就可以快速找到我们最近所需的文件。
另外，Spotlight搜索还可以帮助我们快速启动应用程序。
我们可以在搜索框中输入应用程序的名称，然后按下回车键，就可以快速启动该应用程序。
此外，我们还可以通过输入应用程序的首字母或缩写来进行搜索。
例如，我们可以输入“Safari”来启动Safari浏览器，输入“Xcode”来启动Xcode开发工具。
这样一来，我们就可以更加方便地启动我们常用的应用程序。
除了文件和应用程序的搜索，Spotlight搜索还可以帮助我们查找联系人和电子邮件。
我们可以在搜索框中输入联系人的姓名或电子邮件地址，然后按下回车键，就可以快速找到该联系人的详细信息。
darwin 操作系统常用的命令Darwin是一种开放源代码的类Unix操作系统内核，它作为苹果公司macOS和iOS操作系统的基础。
Darwin提供了许多常用的命令，可以用于管理和操作系统上的各种任务。
下面是一些常用的Darwin操作系统命令，介绍它们的功能和用法。
1. ls（list）：列出目录中的文件和子目录。
用法示例：ls -l，显示文件和目录的详细列表；ls -a，显示所有文件，包括隐藏文件。
2. cd（change directory）：切换当前工作目录。
用法示例：cd [目录路径]，进入指定的目录；cd ..，返回上一级目录。
3. pwd（print working directory）：显示当前工作目录的路径。
4. mkdir（make directory）：创建新目录。
用法示例：mkdir [目录名]，在当前目录下创建一个新的目录。
5. rmdir（remove directory）：删除空目录。
用法示例：rmdir [目录名]，删除指定的空目录。
6. cp（copy）：复制文件和目录。
用法示例：cp [源文件路径] [目标文件路径]，将源文件复制到目标位置。
7. mv（move）：移动文件和目录，也可以用来重命名文件。
用法示例：mv [源文件路径] [目标文件路径]，将源文件移动到目标位置。
8. rm（remove）：删除文件和目录。
用法示例：rm [文件路径]，删除指定的文件；rm -r [目录路径]，递归删除目录及其内容。
9. touch：创建空白文件或更改文件的访问和修改时间。
用法示例：touch [文件名]，在当前目录下创建一个新的空白文件。
10. cat（concatenate）：连接文件并显示其内容。
用法示例：cat [文件路径]，显示指定文件的内容；cat [文件1] [文件2] >[目标文件]，将文件1和文件2的内容合并到目标文件中。
11. head：显示文件的开头部分。
Acunetix Web Vulnerability ScannerGetting StartedV6.5By Acunetix Ltd. 1Starting a ScanThe Scan Wizard allows you to quickly set-up an automated crawl and scanof your website. An automated scan provides a comprehensive and deepunderstanding of the level website security by simply reviewing the individualalerts returned.This chapter explains the process of launching a security audit of yourwebsite through the Scan wizard.NOTE:DO NOT SCAN A WEBSITE WITHOUT PROPERAUTHORISATION! The web server logs will show the scans and any attacksmade by Acunetix WVS. If you are not the sole administrator of the websiteplease make sure to you warn other administrators before performing a scan.Some scans might cause a website to crash requiring a restart of thewebsite.Step 1: Select Target(s) to Scan1. Click on ‘File > New > New Website Scan’ to start the Scan Wizard or clickon ‘New Scan’ button on the top right hand of the Acunetix WVS userinterface.Screenshot 1 – Scan Wizard Select Scan Type2. Specify the target or targets to be scanned. The scan target options are:·Scan single website - Scans a single website. Enter a URL, e.g., https://.·Scan using saved crawling results- If you previously performed acrawl on a website and saved the results, you can analyze these resultsdirectly without having to crawl the site again. Specify the ‘Saved crawlerresults’ file by clicking on the folder button.·Scan List of Websites- Scans a list of target websites specified in aplain text file (one target per line). Every target in the file is to be specifiedin the format <URL> or <URL:port> if the web server is listening on a nondefault port. The maximum number of websites Acunetix WVS can scanat 1 time is between 20 and 30 sites; depending on the size of thewebsites.2 Acunetix Web Vulnerability Scanner·Scan Range of Computers - This will scan a specific range of IP's (e.g.192.168.0.10-192.168.0.200) for target sites which are open on thespecified ports (Default 80, 81 and 443).3. Click 'Next' to continue.Step 2: Confirm Targets and Technologies DetectedScreenshot 2 – Scan Wizard Selecting Targets and Technologies Acunetix WVS will automatically probe the target website(s) for basic detailssuch as operating system, web server, web server technologies and whethera custom error page is used (For more details on Custom Error Pages referto the section ‘Settings > Scanner Settings > Custom 404 Pages’ in the usermanual).The web vulnerability scanner will optimize the scan for the selectedtechnologies and use these details to reduce the number of tests performedwhich are not applicable (e.g. Acunetix WVS will not probe IIS tests on aUNIX system). This will reduce scanning time.Click on the relevant field and change the settings from the provided checkboxes if you would like to add or remove scans for specific technologies.3Step 3: Specify Crawler OptionsScreenshot 3 – Scan Wizard Crawling OptionsIn this dialog you can configure the crawling options.Crawling OptionsThe Crawler traverses the entire website and identifies its structure. Thefollowing crawling options may be configured:·Start HTTP Sniffer for manual crawling at the end of the scan process.·Get first URL only.·Do not fetch anything above start folder.·Fetch files below base folder.·Fetch directory indexes even if not linked.·Submit forms.·Retrieve and process robots.txt, sitemap.xml.·Case insensitive paths.·Analyze JavaScript.·After crawling let me choose the files to scanIf the scan is from a saved crawl result, these options will be grayed out.Note:Using default crawling options allows you to scan your websiteswithout any problems. If you would like to tweak the crawling options, pleaserefer to Configuring the Crawler section in the user manual.4 Acunetix Web Vulnerability ScannerStep 4: Specify Scanning Profile Options and ModeScreenshot 4 – Scan Profile and Mode OptionsIn this dialog you can configure the scanning profile and scan options,including the options for the scanning mode.Scanning ProfileThe Scanning Profile will determine which tests are to be carried out againstthe target site. For example, if you only want to test your website(s) for SQLinjection, select the profile sql_injection and no additional tests would beperformed.Refer to the ‘Scanning Profiles’chapter in the user manual for moreinformation on how to customize existing profiles and create new scanningprofiles.Scan OptionsFrom this section you can select the Scanning Mode which will be usedduring the scan. The scanning mode options are the following:·Quick- In this mode the scanner will test for just the first value ofevery parameter.·Heuristic- In this mode the scanner will try to automatically figureout for which parameters to test all values and for which not to test allvalues.·Extensive- In this mode the scanner will test all possiblecombinations for all parameters on the website. In some cases, thiscan generate a huge number of requests and should be used withcaution.The other options which you can select from this step of the wizard are:·Test known web application vulnerabilities on every directory - Ifthis option is selected, the scanner will test for known web applicationvulnerabilities on every directory instead of the default directory only.5This option will generate a lot of HTTP traffic and will extend thescanning time if the website being scanned is very large.·Manipulate HTTP headers- With this option selected, the scannerwill try to manipulate the HTTP headers which might be used byserver side technologies.·Enable Port Scanning - Tick this option to run the port scanneragainst the web server during a website scan. For more details aboutthe Port Scanner refer to page Error! Bookmark not defined.‘Configuring the Port Scanner’.·Enable AcuSensor Technology - Tick this option to enableAcuSensor Technology during the scan. Note that the AcuSensorclient has to be installed on the web server which is being scanned.For more details about the AcuSensor Technology refer to the‘AcuSensor Technology’ section in the user manual.Note: If the scan is being launched from saved scan results, in theEnable AcuSensor Technology section you can specify to use sensordata from crawling results without revalidation, or to not use sensor datafrom crawling results or to revalidate sensor data from the drop downmenu.Step 5: Configure Login for Password Protected AreasAcunetix supports 2 types of Login pages:·HTTP Authentication - This type of authentication is handled by theweb server, where the user is prompted with a password dialog.·HTML Authentication- This type of authentication is handled via aweb form. The credentials are sent back to the server for validationby a custom script.Screenshot 5 - Login Details OptionsScanning a HTTP Password protected area:Tick the box ‘Authenticate with this user name and password combination’and enter the username and password.6 Acunetix Web Vulnerability ScannerScanning a HTML Password protected area:1. Click on ‘Record new login sequence’, browse to the HTML forms loginpage, and record the login sequence by entering the credentials andauthenticating.2. Once authenticated, you also need to identify the logout link so the crawlerwill not crawl that link and logs out the user session. Click on ‘Next’ toproceed to record the restricted link. Click on the link which logs out the usersession. Click ‘Next’ to specify an ‘In Session’ or ‘Out of Session pattern’.3. Click on ‘Detect’ for the scanner to try to automatically detect a pattern forit to recognize when the session is still valid or not. If the scanner is unableto automatically detect, specify a pattern manually in the Pattern input field.You can use Regular Expressions to specify the pattern. Specify also thepattern type. Click on ‘Check Pattern’ to verify the pattern.4. Click on exit and Save the Login Sequence. You can reuse the loginsequence during future scans. Login sequences can be edited from the ToolsExplorer by selecting ‘Configuration > Scanner Settings > Login sequences’node in the Settings Interface.Note: For further information about creating and editing Login Sequencesrefer the section ‘Settings > Scanner Settings > Login Sequences’ in the usermanual.Step 6: Configure Custom 404 Error PagesA 404 error page is the page which appears when a requested page is notfound. In many cases, rather than displaying the standard error 404, manywebsites show a page formatted according to the look and feel of the websiteto inform the user that the page requested does not exist. Custom 404 errorpages do not necessarily represent a server 404 error (Page not found), andtherefore Acunetix WVS must be able to automatically identify these pages todetect the difference between a non existing URL and a valid web page.The scan wizard will automatically try to detect whether the site uses customerror pages.I f it does, WVS will display the custom error page a n d willautomatically attempt to locate the unique identifier of such an error page; inthis case Error 404: Page Not Found. If it does not detect custom 404 errorpages but the site uses them, then they have to be configured manually.Note: Typically, most of the websites return 404 errors when a requestedURL is not found. If you need to configure a Custom 404 Error page, refer tothe section ‘Settings > Scanner Settings > Custom 404 Pages ‘ in the usermanual.Step 7: Select the Files and directories to ScanIf the option ‘After crawling let me choose the files to scan’ was ticked in thecrawling options, a window with the site structure will open up, from which aselection of files to scan and ones to ignore can be made after the crawlprocess is finished.Step 8: Completing the scanIf you want to save the scan results to a database, enable ‘Save scan resultsto the database for report generation‘. Click on the ‘Finish’button to start thescan.Now click ‘Finish’ to start the scan. Depending on the size of thewebsite a scan may take several hours!78 Acunetix Web Vulnerability Scanner。
如何在macOS终端中进行程序调试在开发和调试程序的过程中，终端是一个非常有用的工具。
在macOS系统上，终端提供了一种简单而强大的方式来进行程序调试。
本文将介绍如何在macOS终端中进行程序调试，帮助开发者更高效地解决代码中的错误和问题。
一、使用GDB进行调试GDB（GNU Debugger）是一个强大的开源调试器，它可以用于调试多种编程语言，包括C、C++等。
在终端中使用GDB调试程序可以帮助开发者追踪代码的执行过程，查找错误的根源。
以下是在终端中使用GDB进行程序调试的步骤：1. 编译程序时加入调试信息在使用终端进行程序调试之前，我们需要确保程序在编译时加入调试信息。
可以通过在终端中使用以下命令来编译程序：```gcc -g program.c -o program```其中，`program.c`是你的程序源代码文件，`program`是编译后生成的可执行文件。
`-g`参数表示在编译时加入调试信息。
2. 启动GDB调试器在终端中使用以下命令启动GDB调试器：```gdb program```其中，`program`是你的可执行文件。
3. 设置断点在GDB调试器中可以设置断点，以便在程序执行到指定位置时中断。
可以使用以下命令设置断点：```break line_number```其中，`line_number`是你希望设置断点的代码行号。
4. 运行程序使用以下命令来运行程序：```run```程序将会执行，并在达到断点位置时停止。
5. 调试程序在程序停止时，我们可以使用一些GDB提供的命令来调试程序，例如查看变量的值、单步执行代码等。
以下是一些常用的调试命令：- `print variable_name`：查看变量的值- `next`：执行下一行代码- `step`：进入函数并调试函数内部代码- `continue`：继续执行程序- `quit`：退出调试器通过使用这些命令，我们可以逐步调试程序，找出代码中的错误。
Spotlight学习笔记工具版本号Spotlight8.1.0.1679日期模块修改说明20150908Spotlight监控linux1、监控linux资源1.1创建用户1、在linux创建Spotlight用户，spotlight默认不能使用root用户进行连接，需要用户自己创建一个具有root权限的用户。
创建Spotlight用户useradd spotlight设置密码passwd spotlight设置spotlight用户具有root用户权限vi/etc/passwd将spotlight的UID和GID改成0：01.2检查Linux是否安装sysstat1、检查是否安装sysstat包：rpm-q sysstat；2、如果没有，安装：rpm-ivh sysstat。
1.3spotlight连接linux1、打开spotlight,选择“file-connect”,如图：选择左侧的spotlight on unix,点击addnew connection，添加连接，如图：输入服务器IP、用户名及密码，如图：输入完成后，点击connect即可连接服务器，如图：1.4home在服务器的监控面板中可以看到诸如System、Network、CPU、Memory、Paging Files、Disks等运行状况。
Spotlight以红、黄、蓝三种颜色标识服务器各组件的运行状况：红色是警报提示，如果哪项参数显示红色，就表示当前服务器的该组件性能告急或者出现了性能瓶颈，需要管理员马上解决相关问题，如图所示，笔者服务器的CPU的利用率太大，达到了100%。
单击Total CPU Usage区域弹出警告说明，并为管理员提供解决方案。
如果哪一项显示为，表示该项处于亚健康状态，需要管理防范和注意了。
如果是绿色，则该项运行正常。
1.4.1systemSystem显示系统信息，包括linux版本、系统已运行的时间、现在的时间1.4.2CPU1.4.2.1CPU面板参数CPU面板显示linux系统的处理器及负载信息。
getting started 语法（原创版3篇）篇1 目录1.介绍 Getting Started 语法2.讲解基本语法规则3.演示如何使用 Getting Started 语法进行文本编写4.总结 Getting Started 语法的特点和优势篇1正文一、介绍 Getting Started 语法Getting Started 语法是一种简单易学的编程语言，适合初学者入门。
它以简洁明了的语法规则和强大的功能受到许多编程爱好者的喜爱。
本文将介绍如何利用 Getting Started 语法编写一些基本的程序，帮助大家快速上手。
二、讲解基本语法规则1.变量在 Getting Started 语法中，变量是用于存储数据的标识符。
你可以为变量分配一个数据类型，如整数、浮点数或字符串。
2.控制结构Getting Started 语法提供了丰富的控制结构，包括条件语句（如if-elif-else）、循环语句（如 for 循环和 while 循环）等，帮助你编写出复杂的程序逻辑。
3.函数在 Getting Started 语法中，函数是一段可重用的代码块，用于执行特定任务。
通过定义函数，你可以将代码分解为更小的、可管理的部分。
三、演示如何使用 Getting Started 语法进行文本编写下面是一个简单的示例，演示如何使用 Getting Started 语法编写一个程序，该程序计算一个列表中所有数字的平均值：```def calculate_average(numbers):total = 0count = 0for number in numbers:total += numbercount += 1return total / countumbers = [1, 2, 3, 4, 5]result = calculate_average(numbers)print("The average of the numbers is:", result)```四、总结 Getting Started 语法的特点和优势Getting Started 语法具有以下特点和优势：1.易学易用：语法简单，容易理解和掌握，适合编程初学者。
Spotlight®on Unix8.0 Getting Started Guide©2011Quest Software,Inc.ALL RIGHTS RESERVED.This guide contains proprietary information protected by copyright.The software described in this guide is furnished under a software license or nondisclosure agreement.This software may be used or copied only in accordance with the terms of the applicable agreement.No part of this guide may be reproduced or transmitted in any form or by any means,electronic or mechanical, including photocopying and recording for any purpose other than the purchaser’s personal use without the written permission of Quest Software,Inc.The information in this document is provided in connection with Quest products.No license, express or implied,by estoppel or otherwise,to any intellectual property right is granted by this document or in connection with the sale of Quest products.EXCEPT AS SET FORTH IN QUEST'S TERMS AND CONDITIONS AS SPECIFIED IN THE LICENSE AGREEMENT FOR THIS PRODUCT,QUEST ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS,IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING,BUT NOT LIMITED TO,THE IMPLIED WARRANTY OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE,OR NON-INFRINGEMENT.IN NO EVENT SHALL QUEST BE LIABLE FOR ANY DIRECT, INDIRECT,CONSEQUENTIAL,PUNITIVE,SPECIAL OR INCIDENTAL DAMAGES (INCLUDING,WITHOUT LIMITATION,DAMAGES FOR LOSS OF PROFITS,BUSINESS INTERRUPTION OR LOSS OF INFORMATION)ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT,EVEN IF QUEST HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.Quest makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice.Quest does not make any commitment to update the information contained in this document.If you have any questions regarding your potential use of this material,contact:Quest Software World HeadquartersLEGAL Dept5Polaris WayAliso Viejo,CA92656email:legal@Refer to our Web site()for regional and international office information. PatentsProtected by U.S.Patents#7,784,027and6,901,582.Additional patents pending.TrademarksQuest,Quest Software and the Quest Software logo are trademarks and registered trademarks of Quest Software,Inc in the United States of America and other countries.For a complete list of Quest Software’s trademarks,please see /legal/trademark-information.aspx. Other trademarks and registered trademarks are property of their respective owners.Spotlight on Unix8.0 Getting Started Guide Thursday,18August2011Table of ContentsWelcome6 An Overview Of Spotlight on Unix6 Home Page6 Alarms6 Drilldowns7 Features of Spotlight7 Features Common to Spotlight Applications7 Install Spotlight8 Requirements8 Steps To Install9 Multiple Concurrent Installations10 Uninstall Spotlight10 Configure the Unix System11 Start Spotlight13 Authorize Spotlight13 Spotlight on Unix15 Connect to Unix Systems15 Add a new connection15 Spotlight on Unix Home Page17 System Panel18 Network Panel19 CPU Panel19 Memory Panel20 Disk Activity Panel20 Swap Space Panel21 Spotlight on Unix Alarms215 Spotlight on Unix Getting Started GuideTable of ContentsSpotlight on Unix Drilldowns23 Troubleshooting Spotlight on Unix24 Using Trace To Add Details To Support Bundle24 Product Authorization Errors24 iostat Not Installed25 Issues With Data Availability25 Alarm Help Displayed Instead of Drilldown25 High Spotlight Load on Monitored Server26 Appendix:Contact Quest27 Contact Quest Support27 Contact Spotlight Support27 Contact Quest Software28 About Quest Software28 Index291WelcomeSpotlight on Unix is Quest Software’s powerful diagnostic and problem-resolution tool for Unix and Linux operating systems.Its unique user interface provides you with an intuitive,visual representation of the activity on your host machine.An Overview Of Spotlight on UnixHome PageSpotlight on Unix makes it possible for you to view your system at different levels of detail.At its highest level,which is the Spotlight home page,Spotlight displays a visual representation of the status of the major components of the current system.The detail at this level is designed to help you locate and identify bottlenecks quickly.information.See"Spotlight on Unix Home Page"(page17)for more ArrayAlarmsSpotlight alarms indicate when the Unix system exceeds acceptable performance thresholds.Spotlight on Unix Getting Started Guide7 WelcomeSee"Spotlight on Unix Alarms"(page21)for more information.DrilldownsOnce a problem is isolated you can display a drilldown page with charts and tables that provide a detailed breakdown of the underlying statistics.See"Spotlight on Unix Drilldowns"(page23)for more information.Features of SpotlightFeatures Common to Spotlight ApplicationsSpotlight is designed for ease of installation and use,and offers a range of tools for problem diagnosis.Features that are common to most Spotlight applications include:l Easy installation.l The display of real-time data.l Comprehensive information in charts and tables.l Visible,audible and configurable alarms.l Context-sensitive help.l Calibration.l Recording and playback of historical data.l Common Spotlight technology.Spotlight on Unix can run within the same Spotlight console as several other Quest Spotlight products.Install SpotlightRequirementsWindows7/Windows Vista/Windows Server2008:Section RequirementUser Privileges Ensure the Windows user installing Spotlight hasWindows Administrator privileges.Folder Permissions During installation,Spotlight requires write access tothe following:l The Spotlight installation folder(by default,Program Files\Quest Software\Spotlight)l Program Files\Common Files\Quest Sharedl ProgramData\Quest Software\Spotlightl Users\<current user>\AppData\Roaming\QuestSoftware\SpotlightNote: For64-bit operating systems the Program Filesdirectory is Program Files(x86).Permissions to Windows registry keys and sub-keys During installation,Spotlight requires write access tothe following:l HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\QuestSoftware\Productsl HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\QuestSoftware\Spotlightl HKEY_CLASSES_ROOT2Windows XP/Windows Server2003:Section RequirementUser Privileges Ensure the Windows user installing Spotlight hasWindows Administrator privileges.Folder Permissions During installation,Spotlight requires write access tothe following:l The Spotlight installation folder(by default,Program Files\Quest Software\Spotlight)l Program Files\Common Files\Quest Sharedl Documents and Settings\All Users\ApplicationData\Quest Software\Spotlightl Documents and Settings\<currentuser>\Application Data\QuestSoftware\SpotlightPermissions to Windows registry keys and sub-keys During installation,Spotlight requires write access to the following:l HKEY_LOCAL_MACHINE\SOFTWARE\Quest Software\Productsl HKEY_LOCAL_MACHINE\SOFTWARE\Quest Software\Spotlightl HKEY_CLASSES_ROOTSteps To InstallTo install Spotlight from CD:1.Close all open applications on your PC.2.Insert the Spotlight installer CD into your CD-ROM drive.If the installation program does not start automatically select Windows Start|Run.Enter the command d:\SoU.vvv.exe(where d:is the CD-ROM identifier and vvv is theSpotlight version).3.Follow the instructions on screen to complete the installation.To install Spotlight from the downloaded Spotlight installer from the Quest web site:1.Close all open applications on your PC.2.Execute the downloaded installer.3.Follow the instructions on screen to complete the installation.Note: To cancel installation at any time,press Esc or click Cancel.Multiple Concurrent InstallationsMany Spotlight applications can run within a single Spotlight installation and you can install and separately upgrade multiple copies of Spotlight on your computer.Note: If Spotlight is delivered as part of the Toad DBA Suite and you require multiple Spotlight installations on your computer then contact Quest Software for more information. Uninstall SpotlightTo remove the application and all associated files from your machine,if required.To uninstall Spotlight1.Open Windows Control Panel.2.Select Programs and Features.(On Windows XP select Add/Remove Programs.)3.Click Spotlight on Unix(or the Spotlight product you installed if Spotlight on Unix wasbundled within).4.Click Remove|Yes.Configure the Unix SystemTo monitor a Unix system with Spotlight,ensure the Unix system is configured as follows. Unix servers and versions.Spotlight on Unix supports the following server operating systems:l Sun Solaris9,10,11l HP-UX11i,11i v2,11i v3l IBM AIX5.2,5.3,6.1l Red Hat and SUSE operating systems running Linux2.4and2.6kernelsUnix programs.Ensure the following Unix programs are accessible to the Unix login(through Spotlight):l Perl5.xl awkl catl datel dfl grepl ifconfigl iostat(not HP-UX) l netstat l psl sarl sedl trl uname l uptime l vmstat l wcl whoFor HP-UX,additionallyl bdfl cstml getconf l swapinfol/usr/sbin/ioscanFor AIX,additionallyl lsattr l lsdev l lspsl prtconfFor Solaris,additionallyl/etc/swap l mpstat l nawkl prtconf3Spotlight on Unix Getting Started Guide12 Configure the Unix SystemUnix User Permissions and Installation Settingsl The Unix user should have no special processing on log-on.In particular there must be no input required from the user,and nor should any special login banners be displayed.l On AIX,the user must be a member of the"adm"group to be able to run the sar command.l On Linux,the sysstat package must be installed to enable the user to get detailed disk I/O information.l On Linux the/proc filesystem must be present.l For connection using SSH,the sshd daemon must be installed and running.Remote Connectivity: SSH or REXECSpotlight on Unix will require you to select the connection type:SSH or rmation on SSH and REXEC is freely available on the Internet.We recommend SSH as password data is transmitted encrypted.REXEC does not encrypt password data.Notes:l Make sure the relevant SSH or REXEC daemon is running on the Unix machine and is configured to receive remote connections.l Commands to observe system activity(for example,netstat,vmstat,iostat,sar)must be accessible to REXEC/SSH sessions for Spotlight to observe Unix activity.Ensure these commands are located in the search path for REXEC/SSH sessions.If not,Spotlight will display an error.Notes(Specific to SSH):l Spotlight supports both SSH1and SSH2protocols.l To allow Spotlight to make SSH connections to any Unix or Linux hosts that permit SSH connections,you may need to alter the PasswordAuthentication configuration item in the sshd_config file.Set the value of PasswordAuthentication to yes.Once you havemodified the sshd_config file you must restart the sshd process to apply the new setting.l Public-key encryption is supported under SSH2only.DSA and RSA are supported.Note(Specific to REXEC):When Spotlight is monitoring a Unix operating system via REXEC with a valid user ID and password,remote commands may not work on the Unix host unless that user ID is added to the/etc/hosts.equiv file on the host.4Start Spotlighticon»Double click on the Spotlight desktopor…»On the Windows task bar,click Start|Programs| Quest Software|Spotlight| Spotlight.During operation,Spotlight requires write access to the following:Windows Server2008/Windows Server2003/Windows Vista/Windows7:l Users\<current user>\AppData\Roaming\Quest Software\Sharedl Users\<current user>\AppData\Roaming\Quest Software\SpotlightWindows XP:l Documents and Settings\<current user>\Application Data\Quest Software\Sharedl Documents and Settings\<current user>\Application Data\Quest Software\SpotlightAuthorize SpotlightSpotlight on Unix is supplied with a time-limited trial key so you may test the product.When the trial key expires Spotlight on Unix reverts to a preview mode,which limits access to Spotlight.You will be able to see the Spotlight on Unix home page and one connection at a time.If you select to open a drilldown in preview mode the following message is displayed: The current license does not allow access to this functionality.Contact your Quest Software representative to obtain the necessary authorization keys to ensure Spotlight remains fully functional when the trial key expires.To enter a new authorization key:While Spotlight is running1.Click Help|About Spotlight.2.Ensure Installed Products is to the front.3.Locate Spotlight on Unix in the list of installed products.4.Select View/change product license.Spotlight on Unix Getting Started Guide14 Start Spotlight5.Click Change this license.6.Enter the Authorization key.Notes:l The Windows user that updates the authorization key must have administrator access to the Windows registry and write access to the Console\Licenses sub-folder of theSpotlight installation folder.l Make sure you enter the authorization key exactly as stated on your Product Authorization sheet or as provided by your Quest Software distributor.The site message is case sensitive.If you enter the authorization key incorrectly,the following message is displayed: Invalid authorization keyl If Spotlight is in preview mode and the trial period has not expired,check your computer system date is set correctly.5 Spotlight on UnixConnect to Unix Systems1.From the Spotlight Browser select All Connections| Spotlight on Unix2.Select the machine to connect to.If the Unix machine is not listed then follow theconnection.instructions to add a newAdd a new connectionNote:Ensure the Unix system is configured before you connect to it.See"Configure the Unix System"(page11)for more information.Connect1.Click File|2.Select Spotlight on Unix on the Connectionsmenu..3.Double-click Add new connection4.Fill in the Details page of the Properties window:Field DescriptionConnection name Enter the preferred display name for the Unix machine.Note:If left blank,the Connection name field resets to the value of the Address field.Server Connection DetailsField DescriptionAddress Enter the hostname or IP address to the Unix machine.User Enter the user name to login to the Unix machine.Note:The root user is not allowed.Remote login as"root"has beendisallowed for security reasons.Password Enter the password to login to the Unix machine.Note: Not applicable when Use SSH Public/Private Keys isselected.Applicable when Save password details(for thisconnection) is selected.Connection Type Select according to the Unix system's configuration.The options are: REXEC and SSH.See"Configure the Unix System"(page11)for more information.Port Number Enter the port number for SSH(secure shell)connection to the Unix machine.The default value is22.Note: Applicable when the Connection Type is SSH.SSH Key AuthenticationNote: Applicable when the Connection Type is SSH.Field DescriptionUse SSHPublic/PrivateKeysSelect according to the Unix machine's configuration.SSH Key Type Choose the type of key to use when making the Spotlight connection:RSA or DSA.See"Configure the Unix System"(page 11)for more information.SSH Private key Filename Locate the file that contains the private key for the Spotlight connection.Either clickField Descriptionor type the filename and location.SSH Passphrase Type the passphrase used to decrypt the private key. Note: Applicable when Save password details(for this connection) is selected.Select Save password details(for this connection) to save all entered password details.5.Close the dialog.Click DescriptionConnect Save changes and open the connection in Spotlight.Note: If you experience problems connecting there may be an issue withthe Unix configuration.See"Configure the Unix System"(page11)formore information.OK Save changes.Do not open the connection in Spotlight.Cancel Do not save changes.Spotlight on Unix Home PageThe Spotlight home page shows the flow of information and commands between various sub-components and the size and status of internal resources such as processes,disk files and memory structures.Related operating system statistics are grouped together on panels that are connected by a series of graphical flows and icons.Spotlight updates these flows in real time so you can see how quickly data is moving through the system.The icons change color as Spotlight alarms are raised,upgraded,downgraded and canceled.The panels on the Spotlight on Unix home page are described in more detail next.For a full discussion of the panels,see the Spotlight online help.Tip:Hover the mouse pointer over a panel component for more information.System Panell The type and version of operating system.l The length of time since the machine was last booted.l The date of the last data collection.(system date)l The time of the last data collection.(system time)Network PanelThe Network panel shows the logins,connections and movement of data onthe Unix system:l The number of users currently logged on to the machine.l The number of external programs with which the machine is currentlycommunicating.The three types of connections shown areEstablished,Time_Wait,and Close_Wait.l How fast is data moving through the NICs(network interface cards).The statistics refer to the rate at which network packets and errors arebeing received and sent through the NICs.The flows between the Network panel and the CPU panel represent the rate of data transfer between the Unix host and the connected network.The flows include the incoming and outgoing rates of data to and from the Unix host,and the rates at which bad packets are received from,or sent to,the network.CPU PanelThe CPU panel shows processor and load information for the Unix system:l The number of CPUs in the machine.l The CPU load(as a percentage)across all CPUs on the machine.l The percentage of time the CPU is in the User state across all CPUs.l The percentage of time the CPU is in the System state across allCPUs.l The percentage of time the CPU is in the Wait state across all CPUs.Wait is where the machine can only wait for I/O,or somethingsimilar,to complete.l The length of the run queue in which processes are waiting to beexecuted.Processes in this queue will be run when the CPU becomesavailable.l The total number of processes that are running on the machine.l The number of"zombie"processes:child processes whose terminationhas not been acknowledged by their parent process.l The number of processes waiting for some event or condition beforethey can continue execution.The flows between the CPU panel and the Memory panel represent paging information between CPU and memory on the Unix host.The flows indicate the rate data is written out of and read into memory.The unit of measure is dependent on the Operating System.See"CPU Panel"in the online help for more information.Memory PanelThe Memory panel displays detailed information about the physical andvirtual memory on the Unix system.It shows statistics such as:l The total amount of physical memory in RAM.l The amount of physical memory that is free.l The total amount of virtual memory for the system.l The amount of virtual memory that is free or unused.l The amount of virtual memory consumed,expressed as a percentageof its maximum size.l Where applicable,the number of processes whose pages have allbeen moved into swap space.The flows between the Memory panel and the Swap Space panel represent the rate at which processes are being swapped out to disk and swapped in from disk.Disk Activity PanelThe Disk Activity panel shows information on disk usage:l Activity gauges that display the percentage activity of the disks orpartitions with the highest and second-highest read/write rates.l The name of the mount point of the disk with the least amount offree space that is not already100%full.Note:You can configure this control to display the total and usedspace on ANY available disk on the system.Click View|Options.For more information see the online help.l The total size of this disk.l The amount and percentage of disk space that is currently being usedby this disk.The flows between the Disk Activity panel and the Memory panel represent the number of writes the system makes to the disks per second,and the number of reads the system makes from the disks per second.Swap SpacePanelThe Swap Space panel shows the configured swap space on the Unix system:lThe total amount of configured swap space on the system.lThe amount of swap space currently in use.Spotlight on Unix AlarmsSpotlight alerts you to problems with your system by issuing an alarm.You can configure Spotlight in the level of severity that constitutes an alarm,to disable an alarm,and the actions Spotlight takes on raising the alarm.When an alarm is raised Spotlight performs one or more of the following actions:l Changes the color or intensity of relevant components.l Gives audible warnings.lSends email notifications.Actions you can take on an alarm being raised include:lView details of the statistics that caused the alarm in a Spotlight drilldown page.See "Spotlight on Unix Drilldowns"(page 23)for more information.l View the Spotlight online help.l View details of the alarm in the Spotlight Alarm Log drilldown.l Snooze the alarm.l Save the alarm details.lFilter the list of alarms.Following are the alarms specific to Spotlight on Unix.For possible solutions to the problems indicated by these alarms or for information on how to diagnose problems further,see Spotlight on Unix alarms in the online help.Alarm DescriptionBlocked Processes alarmBlocked processes are processes that are waiting on information to become available in memory,or that are waiting for a shared resource,or for thecompletion of disk I/O or network I/O.A high level of blocked processes may indicate an under-configured machine.Alarm DescriptionInput Error Packets Flow alarm The Input Error flow represents the number of erroneous network packets coming into the machine per second.The Input Error Packets Flow alarm may warrant investigation as even a low error rate can indicate network problems.Output Error Packets Flow alarm The Output Error flow represents the number of erroneous network packets sent by the machine per second.The Output Error Packets Flow alarm may warrant investigation as even a low error rate can indicate network problems.Page In alarm A large number of page-ins may be a symptom of a large number of recent page-outs(see Page Out alarm below).To find out what process is reading these pages in,check the resident size of the processes you are running,and see which ones are increasing in size.Alternatively,a large number of page-ins may occur when a large process has just stopped,and the kernel decides to fill that space with memory pages owned by other processes.Check if an important process has ended unexpectedly.Page Out alarm If an active process asks the kernel for more memory than there is immediately available,the kernel will write old memory pages out to swap space.This is known as paging.To stop paging,make sure that there is enough RAM available to support the size of the processes you want to run.Percentage Busy alarm The Most Active Disk gauge shows the disk with the highest read/write rates. The Percentage Busy alarm is triggered when the read/write rate of the most active disk exceeds a specified threshold.The type of alarm that is activated is determined by the percentage of read/write activity experienced by the disk.Swap Space alarm If the total amount of swap space allocated to a Unix host becomes full,the machine may halt all processes,or critical actions may be prevented from occurring.The Swap Space alarm may indicate a runaway process or an under-configured machine.Swap In Flow alarm The Swap In flow represents the number of processes swapped from disk per second.The Swap In Flow alarm may indicate a machine that is under-configured for its workload.Swap Out Flow alarm The Swap Out flow represents the number of processes swapped to disk per second.The Swap Out Flow alarm may indicate a machine that is under-configured for its workload.Used Percentage The Least Space/Disk Space container displays the percentage of used disk space for a specified filesystem.The Used Percentage alarm indicates that theAlarm Descriptionalarm specified filesystem is full or filling up.If the filesystem fills up completely, no more data can be written to it.Zombie Processes alarm The Zombie button in the CPU panel shows the number of terminated child processes that have not been acknowledged by their parent process.The Zombie Processes alarm may indicate the presence of an inferior program,or an entry in/etc/inittab(or equivalent)that prevents init from completing its startup sequence.Spotlight on Unix DrilldownsWhen you have isolated a problem,you can display a drilldown page,whose charts and tables provide a detailed breakdown of the underlying statistics.Following are Spotlight on Unix drilldowns.Drilldown DescriptionProcesses and Services The pages in the Processes and Services drilldown list all the processes running on the Unix machine(including"zombie"processes),and all the services found in the/etc/services file(running or not).Useful features in this drilldown include:l Processes page:View processes in a standard table or tree structure.In the tree structure secondary processes are shown as"children"ofthe processes that run them.Click on a process for more detailedinformation on that process including CPU and Memory utilization.From the Memory Usage chart it is possible to detect memory leaks of the process over the display period.l Zombies page:View child processes whose termination has not been acknowledged by their parent process.l Services page:Use a shortcut menu option to test whether a specified service is available.Activity Summary The pages in the Activity Summary drilldown—Activity,Disk,Memory, CPU,Network,and Logins—show details of the different types of activity on the Unix system.Filesystems The Filesystems drilldown displays detailed information about thefilesystems on the Unix machine.This information can be viewed in chart ortable form:right click over the drilldown page.Alarm Log The Alarm Log drilldown displays information on the alarms associated with the Unix machine.6Troubleshooting Spotlight on UnixThis section identifies general problems that you may encounter when using Spotlight on Unix, and details how to address those problems.If you do not find a solution in this section then check the Spotlight on Unix Release Notes.Using Trace To Add Details To Support BundleWhen you contact Quest support to seek assistance on a Spotlight issue,you can use Spotlight tracing to include additional information in the support bundle that you send to Quest.To turn on Spotlight tracing1.Close all open Spotlight on Unix connections.2.Click View|Options|Tracing3.Select Turn client tracing on to turn on tracing for the computer Spotlight on Unix isrunning on.4.Select Turn server tracing on to turn on tracing for the Unix computer system.5.Click OK.6.Open the connection whose performance you want to trace.With tracing turned on,Spotlight can collect additional information(such as the output from operating-system commands)for the rest of the current session.When you create a support bundle with tracing turned on,the support bundle contains the additional information that Quest can use to investigate your support issue.See"Contact Quest Support"(page27)for more information.Note:All tracing information gathered for Spotlight on Unix is from the Spotlight client.There is no server tracing capability.Product Authorization ErrorsWhen first installed,Spotlight can be used with full functionality for a specified trial period. When the trial period expires,contact your Quest Software representative to obtain an authorization key to continue.See"Authorize Spotlight"(page13)for more information. Notes:。
