When I install a new Linux system, one of my first tasks is to have crontab send all its email to a designated email address, not root. I want to do the same for the at command.
That is I would like the at command to send its job concluded email to a different email than the user who invoked the at command.
However, I cannot find where at is configured. I have been poking around my CentOS 6.4 system to no avail.
CentOS at configuration file is in /etc/sysconfig/atd
according to the man page, the mail notification is as follows:
If the file /var/run/utmp is not available or corrupted, or if the user is not logged on at the time at is invoked, the mail is sent to the userid found in the environment variable LOGNAME. If that is undefined or empty, the current userid is assumed.
One suggestion would be to edit /etc/aliases, and assign your local user a different email address. Doing that would allow at's mail to be redirected the way you intend.
In some cases, the 'at' command is missing entirely and the package needs to be installed. Look for the at.x86_64 or at_i386, at_i486, at_i586 packages.
Both OEL71 and CentOS can add it with:
yum -y install
e.g.: yum -y install at.x86_64
If you try copying the commands from another host, you will get pam authentication errors when run by anything other than root.
In many vendor releases, the 'at' functionality is not appropriate initialized, you may have to activate the /etc/init.d programming for the at command.
How it works is that is basically piggy-backs its work using different files, but usually the crond daemon handles this operation. However, on some implementations a special at daemon is present just to handle all the at commands.
