hi! I would like to know how to run crontab in shell script.
pls help me

You don't. What are you trying to achieve?

Moved: This thread is more suitable in Linux General forum and has been moved accordingly to help your thread/question get the exposure it deserves.


Why not?


Hello and welcome to LQ. Next time please post what you've tried, that makes it easier for us to see how to guide you. Editing a users crontab is easy but requires some steps: 0) list the crontab and output to a temporary file, 1) append the lines you need to the temporary file, 2) run 'crontab temporaryfilename' to make changes stick. You can find the crontab commands in 'man 1 crontab'.

As per SB, I'd ask what the OP actually wants to do.
Sounds like he wants to run a cmd from his crontab at the cmd line, which would just be a copy-paste, ignoring the timing string.
To change a crontab, just use
crontab -e
as the relevant user. No need to mess with temp files etc.