PASSWD(V) − PWB/UNIX 9/10/73
NAME
passwd − password file
DESCRIPTION
Passwd contains for each user the following information:
name (login name, contains no upper case)
encrypted password
numerical user ID
numerical group ID (for now, always 1)
GCOS job number, box number, optional GCOS user-id
initial working directory
program to use as Shell
This is an ASCII file. Each field within each user’s entry is separated from the next by a colon. The GCOS field is used only when communicating with that system, and in other installations can contain any desired information. Each user is separated from the next by a new-line. If the password field is null, no password is demanded; if the Shell field is null, the Shell itself is used. This file resides in directory /etc. Because of the encrypted passwords, it can and does have general read permission and can be used, for example, to map numerical user ID’s to names.
FILES
/etc/passwd