/usr/bin/crontab execution failed: must be privileged to use -u System error: crontab execution error

Question

I want to create a new cronjob via Plesk. After submit the configuration i get the error from my topic. I have tried chmod and chown to the crontabmng without success. my crontabmng owner is root:root and the permission is -rwxr-xr-x

Answer 1

Check for suid bit 's' on /usr/bin/crontab:

# ls -la /usr/bin/crontab
-rwsr-xr-x. 1 root root 57552 Mar 31  2016 /usr/bin/crontab

Answer 2

SOLVED i think with the following:

service psa stopall
chown root.psaadm /usr/local/psa/admin/sbin/wrapper
chmod 4110 /usr/local/psa/admin/sbin/wrapper
chown root.psaadm /usr/local/psa/admin/sbin/mod_wrapper
chmod 4110 /usr/local/psa/admin/sbin/mod_wrapper

and the last step takes some time

service psa start

for now its all running and i get no errors.

hope it helps.