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- .th LOGIN I 3/15/72
- .sh NAME
- login \*- sign onto UNIX
- .sh SYNOPSIS
- .bd login
- [ username ]
- .sh DESCRIPTION
- The
- .it login
- command
- is used when a user initially
- signs onto UNIX, or it may be used at any time to change
- from one user to another.
- The latter case is the one summarized above and
- described here.
- See `How to Get Started' for how to dial up initially.
- .s3
- If
- .it login
- is invoked without an argument,
- it asks for a user name, and, if
- appropriate, a password.
- Echoing is turned off (if possible) during the typing of the password,
- so it will not appear on the written record of the
- session.
- .s3
- After a successful login,
- accounting files are updated and
- the user is informed of the
- existence of
- .it .mail
- and message-of-the-day files.
- .it Login
- initializes the user and group IDs and the working directory,
- then executes a command interpreter (usually
- .it sh
- (I)) according to specifications found in a password file.
- .s3
- Login is recognized by the Shell
- and executed directly (without forking).
- .sh FILES
- /etc/utmp accounting
- .br
- /usr/adm/wtmp accounting
- .br
- .li
- .mail mail
- .br
- /etc/motd message-of-the-day
- .br
- /etc/passwd password file
- .sh "SEE ALSO"
- init (VIII), getty (VIII), mail (I), passwd (I), passwd (V)
- .sh DIAGNOSTICS
- `login incorrect,'
- if the name or the password is bad.
- `No Shell,', `cannot open password file,' `no directory':
- consult a UNIX programming counselor.
- .sh BUGS
-