learn bash scripting

;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

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 \ #

"; 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