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
See `How to Get Started' for how to dial up initially.
is invoked without an argument,
it asks for a user name, and, if
Echoing is turned off (if possible) during the typing of the password,
so it will not appear on the written record of the
After a successful login,
accounting files are updated and
the user is informed of the
and message-of-the-day files.
initializes the user and group IDs and the working directory,
then executes a command interpreter (usually
(I)) according to specifications found in a password file.
Login is recognized by the Shell
and executed directly (without forking).
/etc/motd message-of-the-day
/etc/passwd password file
init (VIII), getty (VIII), mail (I), passwd (I), passwd (V)
if the name or the password is bad.
`No Shell,', `cannot open password file,' `no directory':
consult a UNIX programming counselor.
Login is currently disabled at UCB.