Each user with an account on a system has a single line record in the /etc/passwd file. This record is built by system tools when an administrator creates a user account. This might be a little hard to believe, but the /etc/passwd file can be viewed by all users of a Linux system. All /etc/passwd file records consist of 7 fields.Read answer to: "Linux Command: List All Users In The System"
Centos / RHEL / Fedora / Debian / Ubuntu List Users Command
by Nix Craft on April 9, 2012· LAST UPDATED April 9, 2012