Linux implementation of regular tasks

　　A. A way

　　　(1) The method of the command line:

　　A way a. 　　

　　　　 Requirements: executed once per minute / etc directory is added to the / tmp / a.txt in 

　　　　( 1 ) Touch a.txt create a file 

　　　　( 2) crotab -e customized tasks * / 1 * * * * ls -l / etc / >> / tmp / a.txt 

　　　　 ( . 3 ) to view the contents of the timing tasks: cat a.txt      

　　　　　　view timing of tasks: the crontab - L 
　　　　 ( . 4) the timing of withdrawal tasks: crontab -r  

　　II. Second way

　　　 (2) shell script to perform regular tasks

　　　Second way 
　　　　1.CD / Home in MyTest1 mkdir

　　　　 2 .cd MyTest1 created test2.txt file Touch

　　　　 3 .vim mytt.sh task assignment editor 
　　　　　DATE >> / Home / MyTest1 / test2 
　　　　　CAL >> / Home / MyTest1 / test2 (test2 added to the calendar)

　　　　 4. task Timing: crontab -e edit timer task * / 1 * * * * /home/mytest1/mytt.sh "" " Oh execution entry