Usuários da lista do Ubuntu
cat /etc/passwd
Cooperative Capybara
cat /etc/passwdawk -F: '{ print $1}' /etc/passwdawk -F: '{ print $1}' /etc/passwd
#or
cut -d: -f1 /etc/passwdcut -d: -f1 /etc/passwd
or
cat /etc/passwd$ cat /etc/passwd | cut -d: -f1$ cat /etc/passwd
$ less /etc/passwd
$ more /etc/passwd