passwd - password file
/etc/passwd
The passwd file contains basic information about each user's account. It contains a one-line entry for each authorized user, of the form:
username:password:uid:gid:gcos-field:home_directory:login_shell
Required Fields:
gcos-field The user's real name. The name may be of any length; it may include capital letters as well as lower case, and may include blanks. The name may be empty.
home_directory The user's home directory. The home directory field may be empty.
login-shell The default shell launched at login. This field may be empty.
Here is a sample passwd file when the /etc/shadow does not exist:
root:bDPu/ys5PBoYU:0:1:Operator:/:/bin/csh dave:Qs5I6pBb2rJDA:1234:12:David:/u/dave:/bin/csh dan:MNRWDsW/srMfE:2345:23:Dan:: jim:HNRyuuiuMFerx:::::
If the system keeps the passwords in the /etc/shadow, the file /etc/passwd would be exactly the same but the password field would be empty.
root::0:1:Operator:/:/bin/csh dave::1234:12:David:/u/dave:/bin/csh dan::2345:23:Dan:: jim::::::
na_shadow(5)
, na_options(1), na_nis(8), na_pcnfsd(8), na_nsswitch.conf(5), na_quota(1), na_cifs_access(1), na_cifs_setup(1)