lock(1)

NAME

lock - reserve a terminal

lock [-npv] [-t timeout]

The lock utility requests a password from the user, reads it
again for verification and then will normally not relinquish the ter
minal until the password is repeated. There are two other conditions under
which it will terminate: it will timeout after some interval of time and
it may be killed by someone with the appropriate permission.
The following options are available:
-n Do not use a timeout value. Terminal will be locked
forever.
-p A password is not requested, instead the user's cur
rent login: password is used.
-t timeout: The time limit (default 15 minutes) is changed to; timeout minutes.
-v Disable switching virtual terminals while this ter
minal is: locked. This option is implemented in a way similar; to the -S
option of vidcontrol(1), and thus has the same re; strictions. It
is only available if the terminal in question is a; syscons(4)
virtual terminal.