fuser

Postfix Failed to start : unable to set exclusive lock: Resource temporarily unavailable

If you’re getting the following error starting Postfix on a Virtualmin system: Postfix Failed to start : unable to set exclusive lock: Resource temporarily unavailable

How to deal with fuser: command not found on CentOS

To get the fuser command working on a minimal CentOS install, do the following: yum install psmisc Reference: https://www.itechlounge.net/2016/11/linux-fuser-command-not-found-on-centos-rhel-7/