How to fix Crontab -e - You are not allowed to use this program (crontab)

Question: I've received a new server and logon, trying to use Crontab but getting this error message:

You (your_logon) are not allowed to use this program (crontab)
See crontab(1) for more information

How can I fix?

Answer: It looks like you are experiencing a situation where only root can use crontab - but other logon accounts require some extra steps.

On Linux there are two files which control the access to crontab:

/etc/cron.allow

/etc/cron.deny

You will need to add the logon account to the /etc/cron.allow file. The way to add the logon account is to --su  to root and then :

echo jack > /etc/cron.allow

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