#!/bin/bash

# Returns a list of all users on the system with UID >= 1000 and their home directory and shell
# Sorted lexicographically by username
# Uses getent passwd so as to include remote users (e.g. LDAP) in the list

# getent passwd returns a list of all users on the system, local and remote
# it may return duplicates, since a user might be listed identically in multiple nsswitch databases (e.g. files and systemd)
# as such, we sort the list and remove duplicates with uniq before processing it

# I'm also removing the "nobody" user, since it's a special case and not a real user

# passwd entries have the following format:
#  $username:x:$uid:$gid:$displayname:$home:$shell
#  e.g. root:x:0:0::/root:/bin/bash
# Awk is 1-indexed, so $1 is the username, $2 is the x, $3 is the uid, etc.
# the fields we care about are:
#  $1: username
#  $3: uid
#  $7: shell

getent passwd | sort -t: -k3 -n | uniq | grep -v '^nobody:' | awk -F: '
$3 >= 1000 {
	print $1 " (" $3 "): " $7
}
'