Linux timer (crontab) instance

Examples of Linux experiments----The implementation of "/etc" files under the "/usr/lobal" directory every 2 minutes

· Step1: Edit the current user's crontab and save
Terminal input:
>crontab-u root-l #查看root用户设置的定时器
>crontab-u root-e #进入vi编译模式

xx-2 * * * * */bin/bash/usr/local/crontab_test.sh

#Esc退出编辑模式, save by entering ": Wq" at the end of the file

· STEP2:/usr/local directory, write crontab_test.sh file

#!/bin//usr/localdd= ' date +%d ' MM= ' date +%M ' SS= ' date +%S ' backetc=  /"filebackup finished! "

· STEP3: After the file is built, enter the following command in the terminal to modify the permissions of the file
>chmod u+x crontab_test.sh

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(after a few minutes, you can find more than a few *.tar.gz files by looking in the/usr/local directory!)

attached: Specific Linux under the use of crontab can refer to the "Man crontab" command!

Linux timer (crontab) instance