Thibaut <thibaut@xxxxxxxxxx> writes: > Then I past "*/15 8-18 * * 1-5 parse.sh 2>/dev/null 1>/dev/null" For testing, you should NOT redirect stdout or stderr. That way, you can see what it's doing. After it's working correctly, *then* you can discard the output. > Then I exit and have the message : "crontab: installing new crontab" Normal. > When I'm logged as root I can execute normaly : "./parse.sh" Note that (1) you're not passing the same command line as the crontab, and (2) you're not in the same working directory as the crontab. You probably don't have the same $PATH either. > Where I am wrong ? Likely, you need to make the crontab line something like this: */15 8-18 * * 1-5 /root/parse.sh Note the explicit path. Also, parse.sh might need to do a "cd /root" so that it's in the directory it wants to be in.