/etc/shadow

From Linuxintro

/etc/shadow is a file that contains encrypted passwords for the users listed in /etc/passwd. It can look like this:

root:$2a$10$nAu/t6aigNE1RpgshyXFSO8heERwSFJqAGxUch8fXe5sJFxs.aqp2:14903::::::
bin:*:14749::::::
daemon:*:14749::::::

The columns are separated by colons. The first column contains the user name. The second column contains the password.