Does anyone in here have any experience with GNU Mailman? Specifically, this is v 2.1.18-1. I am trying to figure out how to restart it. This is a Linux server (CentOS). I've tried what I found on the web but it didn't work.

Brian -- which OS version are you on (CentOS has changed a lot over the years). The way to restart a service is specific to the OS rather than the service. If it's a bit more modern (CentOS 7 or 8 ), you will need to use the systemctl commandline tool. systemctl list should get you the list of services, and then systemctl restart servicename should get you going.

Nick, it's CentOS 6.8.

hey Brian - i might know. 😂 i'm pretty sure it was in /etc/rc.d somewhere - maybe /etc/rc.d/init.d?? then you can look for the mailman script and run "mailman stop", etc.