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who.0
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WHO(1L) WHO(1L)
NNAAMMEE
who - show who is logged on
SSYYNNOOPPSSIISS
wwhhoo [-imqsuwHT] [--count] [--idle] [--heading] [--message]
[--mesg] [--writable] [file] [am i]
DDEESSCCRRIIPPTTIIOONN
This manual page documents the GNU version of wwhhoo. If
given no non-option arguments, wwhhoo 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, wwhhoo 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 argu-
ment to wwhhoo to look at who has previously logged on.
If given two non-option arguments, wwhhoo prints only the
entry for the user running it (determined from its stan-
dard input), preceded by the hostname. Traditionally, the
two arguments given are `am i', as in `who am i'.
OOPPTTIIOONNSS
_-_m Same as `who am i'.
_-_q_, _-_-_c_o_u_n_t
Print only the login names and the number of users
logged on. Overrides all other options.
_-_s Ignored; for compatibility with other versions of
wwhhoo.
_-_i_, _-_u_, _-_-_i_d_l_e
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_, _-_-_h_e_a_d_i_n_g
Print a line of column headings.
_-_w_, _-_T_, _-_-_m_e_s_g_, _-_-_m_e_s_s_a_g_e_, _-_-_w_r_i_t_a_b_l_e
Like _-_s, plus after the login name print a charac-
ter indicating the user's message status:
+ allowing wwrriittee messages
- disallowing wwrriittee messages
1
WHO(1L) WHO(1L)
? cannot find terminal device
The long-named options can be introduced with `+' as well
as `--', for compatibility with previous releases. Even-
tually support for `+' will be removed, because it is
incompatible with the POSIX.2 standard.
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