Author: Surendra Anne

For basic crontab configurations please click here Issue1:How to deny a user not to use his/her crontab to schedule his jobs there is seperate contab file for dening for user open and file and specify users name in that file #vi /etc/cron.deny Issue2:Display cron jobs for all users When migrating from one system to another it is good to know if there are cron jobs from other users on the system, here is how to display all of them: 1. for i in `cat /etc/passwd | cut -f 1 -d ‘:’`; do crontab -u $i -l; done; or for user in $(cut -f1 -d: /etc/passwd); do crontab -u $user -l; done will loop over each user name listing out their crontab. The crontabs are owned by the respective users so you won’t be able to see another user’s crontab w/o being them or root. ISSUE3:Using crontab as alaram? I want a song played on every weekday at 5AM and i don’t want it in weekends here is the solution you requred mplayer or vlc player to do this which will support CLI execution. mplayer /music.mp3 & /dev/null& 00 05 * * 1-5 mplayer /music.mp3 & /dev/null& ISSUE4:I have written a shell script that works from console but does not work via crontab. This type of issues will occure in four situations 1. when there is some env variable issue 2....