I had set a cron job:
20 * * * * /usr/bin/sh /home/lucky/myfile.sh
The main problem is that at the schedule time, there is an error:
"mail have sent to /var/spool/mail/lucky".
The contents of myfile.sh is:
mkdir jh
cd jh
This is not ok for a script which is set as a cron job:
mkdir jh
cd jh
You should give the full path where jh directory must to be created. Also, in this path you should have permission to create new files/directories.
For example, your script should look like:
#!/bin/sh
mkdir /home/lucky/jh
cd /home/lucky/jh
Also /usr/bin/sh is not the right path for sh. The right path is /bin/sh. You can check this with whereis sh command. And even so, your cron job should look like:
20 * * * * /home/lucky/myfile.sh
Don't forget to make the script executable:
chmod +x /home/lucky/myfile.sh
