List users in linux

Here is a quick tip on how to more or less reliably list all non-system users and print out status information about their accounts, in linux.

grep -i ':/home/' /etc/passwd | cut -d: -f1 | xargs -n 1 passwd -S

Step 1:
We use grep to look for entries in the /etc/passwd file where the /home/ directory is specified.  System users don't normally have such a directory.

Step 2:
We then use cut to retain only the username, and we specify : (colon) as a delimiter.

Step 3:
We run the usernames through xargs to pass each username as a single argument to the passwd -S command.

passwd -S prints out short status of the username.  Whether it's locked, expired, etc...