Cpanel software update scripts description
In addition to /scripts/upcp
Update System Software Updates your system software. This script is essentially the same as running yum update.
Update Server Software Updates software dependencies required by cPanel that are provided by the operating system.
There are a number of scripts that update applications installed with cPanel.
Shell description is missed in crontab files after migration.
After the migration to the Parallels Plesk Panel 10.x, the cron jobs are not executed by chrootsh.
The SHELL value in the crontab is not copied from the target to the destination server during the migration. Say, servers A and B are configured to use chroot shell. When migrating a customer account with crontab and the SHELL value is omitted:
To resolve this issue, Determine the path to the chrootsh utility with the following command:
# grep chroot /etc/shells
Add the SHELL value to the crontab with the command:
# /usr/local/psa/bin/server_pref -u -crontab-secure-shell
Reference : http://parallels.com