1WHO(1) User Commands WHO(1)
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6 who - show who is logged on
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9 who [OPTION]... [ FILE | ARG1 ARG2 ]
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12 Print information about users who are currently logged in.
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14 -a, --all
15 same as -b -d --login -p -r -t -T -u
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17 -b, --boot
18 time of last system boot
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20 -d, --dead
21 print dead processes
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23 -H, --heading
24 print line of column headings
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26 -l, --login
27 print system login processes
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29 --lookup
30 attempt to canonicalize hostnames via DNS
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32 -m only hostname and user associated with stdin
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34 -p, --process
35 print active processes spawned by init
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37 -q, --count
38 all login names and number of users logged on
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40 -r, --runlevel
41 print current runlevel
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43 -s, --short
44 print only name, line, and time (default)
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46 -t, --time
47 print last system clock change
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49 -T, -w, --mesg
50 add user's message status as +, - or ?
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52 -u, --users
53 list users logged in
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55 --message
56 same as -T
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58 --writable
59 same as -T
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61 --help display this help and exit
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63 --version
64 output version information and exit
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66 If FILE is not specified, use /var/run/utmp. /var/log/wtmp as FILE is
67 common. If ARG1 ARG2 given, -m presumed: 'am i' or 'mom likes' are
68 usual.
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71 Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.
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74 GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
75 Report who translation bugs to <https://translationproject.org/team/>
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78 Copyright © 2018 Free Software Foundation, Inc. License GPLv3+: GNU
79 GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
80 This is free software: you are free to change and redistribute it.
81 There is NO WARRANTY, to the extent permitted by law.
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84 Full documentation at: <https://www.gnu.org/software/coreutils/who>
85 or available locally via: info '(coreutils) who invocation'
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89GNU coreutils 8.30 July 2018 WHO(1)