SLEM 5 must not have unnecessary account capabilities.

Accounts providing no operational purpose provide additional opportunities for system compromise. Therefore all necessary noninteractive accounts should not have an interactive shell assigned to them.

Verify all noninteractive SLEM 5 accounts do not have an interactive shell assigned to them with the following command:

Check the system accounts on the system.

     > awk -F: '($7 !~ "/sbin/nologin" && $7 !~ "/bin/false"){print $1 ":" $3 ":" $7}' /etc/passwd
     root:0:/bin/bash
     nobody:65534:/bin/bash

Obtain the list of authorized system accounts from the information system security officer (ISSO).

If noninteractive accounts such as "games" or "nobody" are listed with an interactive shell, this is a finding.

Configure SLEM 5 so that all noninteractive accounts on the system have no interactive shell assigned to them.

Run the following command to disable the interactive shell for a specific noninteractive user account:

     > sudo usermod --shell /sbin/nologin nobody