Name
who
Synopsis
who [options
] [file
]
Displays information about the current status of the system. With no
options, list the names of users currently logged in to the system.
An optional system file (default is
/var/run/utmp
) can be supplied to give
additional information. who
is usually invoked
without options, but useful options include am
i
and -u
. For more examples,
see cut
, line
,
paste
, tee
, and
wc
.
Options
-
-H
Print headings.
-
-m
Report only about the current terminal.
-
-T
Report whether terminals are writable (
+
), not writable (-), or unknown (?
).-
-u
Report terminal usage (idle time). A dot (.) means less than one minute idle;
old
means more than 24 hours idle.-
am i
Print the username of the invoking user. (Similar to results from
id
.)
Example
This sample output was produced at 8 a.m. on April 17:
% who -uH
NAME LINE TIME IDLE PID COMMENTS
martha ttyp3 Apr 16 08:14 16:25 2240
george ttyp0 Apr 17 07:33 . 15182
The output shows that the user martha
has beenidle
for 16 hours and 25 minutes (16:25, under the IDLE column).
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