learn powershell scripting

1, #!/bin/shThe first line tells the operating system that the interpreter for this script is/bin/sh this executable file2. While loop:#!/bin/shSleep 1; echo "User"; \Sleep 1; echo "Password"; \While true; Do \echo "Output"Sleep 1; \Done3, the shell script realizes the automatic input of Telnet, implements with the pipeline, the last while loop is used to give the last command full execution time(Sleep 1; echo "user"; \Sleep 1; echo "Password"; \Sleep 1; echo "Cd/usr/local"; \Sleep 1; echo "./te

Break is to jump out of the current loop, and continue is to jump out of the loop and start the new loop again[Email protected] test]#CatDemo.SH #/bin/Bash while true; DoRead-P"Please input number:"x yif((x>9)); ThenContinueelif((y>9)); Then BreakElseZ=$ ((x+y))Echo$zfi DoneEcho "Execution completed!"[email protected] test]#SHDemo.SHPlease input number:1 23Please input number:Ten 2 # $x >9, when the back part of the secondary loop is not executing, and the loop starts againPlease input number

;nulGoto Exit))Setjob_tmr=!bak_hou!:0 0if!bak_hou! LSS 10Setjob_tmr=0!bak_hou!:0 0At !job_tmr!/every:1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31%windir%\ Oracleautobackup\oracleautobackup.bat-Backup>nul 2>nul for/F "USEBACKQ"%%i in ('dir%windir%\tasks\at*.job/b/o:d`) Do Setlastat=%%idel%windir%\tasks\oracle automatic backup. Job >nul 2>nulRename%windir%\tasks\!lastat! Oracle automatic Backup.Job::Save configuration file: SaveconfigEcho!bak_hou!>%configfile

Tags: meaning cond centos7 test cat size pre BER syntax errorNote: The comparison string in the shell can only be used = =, Compare numbers using-eq,-ne,-gt,-ge,-lt,-le, or = =, [[Email protected]SH]$CatNumber_compare.SH #!/bin/bash# script Name: Number_compare.SH#用途: Compare two digit sizesEcho "Please input first number :"Read xEcho "You first number x= $x"Read-P"Please input second number:"yEcho "You second number y= $y"if[$x-eq $y]; Then Echo "Equal"elif[$x-gt $y]; Then Echo "x great

Linux Scripting Learning D: Delete rows that match the criteria Sed ' 1,2d '/etc/fstab delete 1, 2 lines, show other rows P: The line that displays the print fit condition Sed '/^\//p '/etc/fstab matches the display, plus the original, there will be 2 duplicateSed-n '/^\//p/etc/fstab displays the line that matches the print A: Add/string after the specified line Sed '/^\//a \ #hello world '/etc/fstab \ #

seconds, in the shell script of the usual term loop.At this point, you press CTRL +z to pause it, and then enter BG to go back into the background.In the case of multitasking, if you want to move the task to the foreground, FG is followed by the task number and the task number can be obtained using the jobs command.9. >>, 2>, 2>> : The above-mentioned directional symbols > and >> denote the meaning of substitution and addition, then there are two symbols which are 2> and 2>> here. Indicate erro

"; REMif the object in the first parenthesis is a file name, enclose it in double quotes . REMTokens=1-3 "for the 1 to 3 columns, behind the suspect is%%a, how can it be%%b?" for/F "Usebackq delims==. Tokens=1-3 "%%a in ('SetOra[%%i] ') Do SetOra_cur=%%bSetora[%%i]=REM\ \ means escaped/ Echo!ora_cur!| Findstr "\" >nul 2>nul Echo!ora_cur!| Findstr "@" >nul 2>nul (Set/A J+=1SetOra[!j!] =!ora_cur! ) ) ) Wrote a lot of notes in order to understand Bat