see users linux code example
Example 1: list users in linux
cat /etc/passwd
Example 2: list all users linux
awk -F: '{ print $1}' /etc/passwd
Example 3: users list linux
cut -d: -f1 /etc/passwd
or
cat /etc/passwd
cat /etc/passwd
awk -F: '{ print $1}' /etc/passwd
cut -d: -f1 /etc/passwd
or
cat /etc/passwd