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WHO(1L) manual page
who - show who is logged on
who [-imqsuwHT] [--count] [--idle]
[--heading] [--help] [--message] [--mesg] [--version] [--writable] [file] [am i]
This manual page documents the GNU version of who. If given
no non-option arguments, who prints the following information for each
user currently logged on:
login name
terminal line
login time
remote hostname or X display
If given one non-option argument, who uses that instead of /etc/utmp
as the name of the file containing the record of users logged on. /etc/wtmp
is commonly given as an argument to who to look at who has previously
logged on.
If given two non-option arguments, who prints only the entry
for the user running it (determined from its standard input), preceded
by the hostname. Traditionally, the two arguments given are `am i', as in
`who am i'.
- -m
- Same as `who am i'.
- -q, --count
- Print only the login names
and the number of users logged on. Overrides all other options.
- -s
- Ignored;
for compatibility with other versions of who.
- -i, -u, --idle
- After the login
time, print the number of hours and minutes that the user has been idle.
`.' means the user was active in last minute. `old' means the user was idle
for more than 24 hours.
- -H, --heading
- Print a line of column headings.
- -w,
-T, --mesg, --message, --writable
- Like -s, plus after the login name print a
character indicating the user's message status:
- +
- allowing write messages
- -
- disallowing write messages
- ?
cannot find terminal device
- --help
- Print
a usage message on standard output and exit successfully.
- --version
- Print
version information on standard output then exit successfully.
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