I have a program named all.sh in the directory home/hmm
52 08 * * * /usr/bin/sh /home/hmm/all.sh
It doesn't run. I know where is something wrong in the /usr/bin/sh. any help?
Your path to the sh executable is wrong. In your interactive shell type: "which sh" to get the actual location and use that in your crontab entry. (It's probably /bin/sh)