In previous versions of Plesk, the users who were granted the permission to schedule tasks with cron but were not allowed access to server shell, could still run scripts in the shell under which the cron was running. This allowed them to gain access to the data that could be potentially used to compromise the server. Starting from Plesk 10.1, execution of cron tasks is automatically restricted to the chrooted shell environment. This is the default setting applied on clean installations of Plesk 10.1 and in cases when data were migrated from other platforms or earlier Plesk versions. If you upgraded to Plesk 10.1 from previous versions (including 10.0), then the chrooted shell is not automatically selected so as not to break execution of any scheduled tasks that your customers could have running.
If you trust your customers enough to allow execution of scripts in a non-chrooted environment, then you can select the required shell by issuing the following command in the console:
If you want to revert this setting and set again the default shell used by the system, issue the following command in the console: