CentOS / RHEL : How to find which user run a specific command?

Question: How can I tell which user ran a specific command ? or If the user clears their .bash_history can I still tell who ran a command?

Answer:

Using the process accounting tools, you can get basic information about who ran a specific command. Below are the steps to find out who run the command.

1. The service must be running before the accounting will take place, this is achieved with the command:

# /etc/init.d/psacct start

2. This can be enabled to run at every boot with the command

# chkconfig psacct on

3. To find out who run a specific command, provide the command name as a parameter to the lastcomm command.

# lastcomm rm

And it should show you who run the command.