【珍藏】批处理常用指令（[collection] common instructions forbatch processing）BAT command Daquan@ # single back offEcho off # began to close back from the next line@echo off # began to close back from the bank. This is the first line of general batch processingEcho on # began to open to the next lineEcho echo off is # displays the current state or echo state onEcho. # output a blank line, "enter"# (echo, echo; echo+ echo[echo] echo/ echo\)2 errorlevelEcho%errorlevel%Each command is run and you can view the return code in this command line formatThe default value is 0, and the general command error is set to errorlevel 13 dirDir # displays the current directory files and subdirectories.Dir /a # display in the current directory files and subdirectories, including hidden and system filesDir c: /a:d # display C in the current directory directory Dir c: /a:-d # display root directory C filesDir c:\ /b/p #/b displays only the file name, and the /p paging displayDir *.exe /s # display the current directory and all the subdirectories.Exe file4 CDCd\ # into the root directoryCD # displays the current directoryCD /d d:\sdk # can also change the drive and directory5 MDMD d:\a\b\c # if d:\a does not exist, it will automatically create the intermediate directoryIf # command extensions are disabled, you need to type MKDIR \a\b\c.6 RdRd ABC # delete the current directory ABC directory, for empty directoryRd /s/q d:\temp # delete the d:\temp folder and subfolders and files, /q quiet mode7 delDel d:\test.txt # deletefile, cannot be hidden, and read-only file systemDel /q/a/f d:\temp\*.*Delete all files inside the d:\temp folder, including hidden, read-only, system files, not subdirectoriesDel /q/a/f/s d:\temp\*.*Delete all files in the d:\temp and subfolders, including hidden, read-only, system files, not subdirectories8 RenRen d:\temp TMP # support to rename folder9 CLSClear the screen10 typeDisplay file contentsType c:\boot.ini # displays the contents of the specified file, the program files usually garbledType *.txt # display all.Txt files in the current directory contents11 copyCopy fileCopy c:\test.txt d:\test.bakCopy the c:\test.txt file to d:\ and rename it to test.bakCopy con test.txtFrom the screen, wait for the input, press Ctrl+Z to end the input, and save the input as a test.txt fileCon stands for screen, PRN stands for printer, and nul stands for empty deviceCopy 1.txt + 2.txt 3.txtMerge the contents of 1.txt and 2.txt and save it as a 3.txt fileIf no 3.txt is specified, then save to 1.txtCopy test.txt +Copying files to themselves is actually modifying the file date12 titleSet the title of the CMD windowTitle New Title # CMD can see the title bar of the window changed.13 verDisplay system version14 label and VolSet the labelVol # display labelLabel # display label, also prompted the new labelLabel c:system # set C label for system15 pausePause command16 REM and::Comment commandThe comment line does not perform the operation17 date and timeDate and timeDate # displays the current date, and prompted a new input date, press "enter" skipDate/t # only displays the current date, not prompt the new dateTime # displays the current time, and prompt new input time, press "enter" skipTime/t # only display the current time, not prompted to enter a new time18 goto and:Jump commandLabel: the # said it is tag line, the tag line does not perform the operationGoto label # jump to the specified label that line19 find (external command)Find commandFind \ \ "abc\" c:\test.txtFind the line containing the ABC string in the c:\test.txt file If not found, the errorlevel return code is set to 1Find /i, "ABC", c:\test.txtFind rows containing ABC, ignore case"Find /c \" "abc\" c:\test.txtShows the number of rows containing ABC20 more (external command)Screen by screen displayMore c:\test.txt # by screen display c:\test.txt file content 21 treeDisplay directory structureTree d:\ # display D disk file directory structure22 &Execute multiple commands in sequence, regardless of whether the command succeeds23 & &Execute multiple commands in sequence, and do not execute the following command when the command that executes the error is encounteredFind "ok\" c:\test.txt & & echoIf the word "ok\" is found, it is shown "success" and cannot be found if it is not found24 ||Execute multiple commands in sequence, and do not execute the following command when the correct command is encounteredFind "ok\" c:\test.txt echo || unsuccessfulIf the word "ok\" is not found, it is shown "unsuccessful \" and is not displayed when it is found25 |Pipe commandDir /s/a find /c. * | \ ".Exe\"The pipe command indicates that the dir command is executed first, and the subsequent find command is executed for the output of the commandThe command line results: output the number of.Exe files in the current folder and all subfoldersType c:\test.txt|moreThis is the same effect as the more c:\test.txt26 > andOutput redirection command> purge the original contents of the file before writing themAppend content to the end of the file without removing the original contentThe main contents of the original display on the screen is output to the specified fileIf the specified file does not exist, the file is automatically generatedType c:\test.txt >prnThe file content is not displayed on the screen, and the output is turned to the printerEcho Hello world>conThe Hello world is displayed on the screen, and virtually all outputs are default >conCopy c:\test.txt f: >nulCopy files and do not display "copy success \" prompt information, but if the f disk does not exist, it will still display error messagesCopy, c:\test.txt, f:, >nul, 2>nulDo not display the prompt information for the successful copy of the file, and the error message is not displayed if the f disk does not existEcho ^^W ^W>c:\test.txt ^>The generated file content is ^W > W"^" and "> are control commands. To output them to a file, you must add a" ^ "sign in front< 27Get input information from the file, not from the screenGenerally used for date, time, label, etc., need to wait for the input command@echo offEcho 2005-05-01>temp.txtDate del temp.txtThis way you can wait for the input to change the current date directly28%0%1%2%3%4%5%6%7%8%9%The command line passes the parameters to the batch%0 batch file itself%1 first parameter%9 ninth parametersAll parameters% from the first parameterThe substitution of batch parameter (%n) has been enhanced. You can use the following syntax:%~1 - delete quotation marks [[]) to expand%1%~f1 - extends%1 to a fully qualified path name%~d1 - extends%1 to a drive letter only%~p1 - extends%1 to only one path%~n1 - extends%1 to only one file name%~x1 - extends%1 to only one file extension%~s1 - extended path refers to a short name%~a1 - extend%1 to file attributes%~t1 - extend the%1 to the date / time of the file%~z1 - extends%1 to the size of the file%~$PATH: 1 - finds the column in the directory of the PATH environment variable, and%1Expand to the first fully qualified name to find. If the environmentThe variable name is not defined, or the file has not been found. This key combination willExtended to empty stringCan be combined to obtain multiple results with revision:%~dp1 - extends%1 to drive letters and paths only%~nx1 - extends%1 to file names and extensions only%~dp$PATH:1 - find%1 in the directory that is listed in the PATHenvironment variable,And extend to the drive letter and path to find the first file.%~ftza1 - extend%1 to similar output lines like DIR.You can see the meaning of each parameter by referring to call/ or for/Echo, load \%%1\, \%%2\, >c:\test.txtThe generated file contents are load \%1\ '\%2\'"In a batch file, the command line arguments are output to the file in this format29 IfJudgement commandIf "%1\" /a\ "echo" ==\ the first parameter is the /aIf /i \ \%1\ 'equ \ /a\' echo, the first parameter is /a/i said the case insensitive, and equ = = is the same, other operators see if/?If exist c:\test.bat echo exists c:\test.bat fileIf, not, exist, c:\windowsEcho does not exist in the c:\windows folder)If, exist, c:\test.batEcho exists c:\test.bat(else)Echo does not exist, c:\test.bat)30 SETLOCAL and endlocalSet the command extension and postpone the extension of the environment variable"SETLOCAL ENABLEEXTENSIONS # "command extensions enable \ \"SETLOCAL DISABLEEXTENSIONS # disable command extensions \ \ ""SETLOCAL enabledelayedexpansion #启用”延缓环境变量扩充\”SETLOCAL disabledelayedexpansion #停用”延缓环境变量扩充\”ENDLOCAL #恢复到使用SETLOCAL语句以前的状态“命令扩展名”默认为启用“延缓环境变量扩充”默认为停用批处理结束系统会自动恢复默认值可以修改注册表以禁用”命令扩展名\”，详见cmd /？。
