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30 .\" @(#)who.1 8.2 (Berkeley) 12/30/93
32 .Dd September 11, 2019
37 .Nd display who is logged in
47 utility displays a list of all users currently logged on, showing for
48 each user the login name, tty name, the date and time of login, and
49 hostname if not local.
57 Time of last system boot.
61 Write column headings above the regular output.
63 Print system login processes.
65 Only print information about the current terminal.
72 Print active processes spawned by
76 List only the names and the number of users currently logged on.
77 When this option is used, all other options are ignored.
79 Print the current runlevel.
80 Supported runlevels are:
81 .Bl -tag -width "s (SINGLE_USER)"
83 The system has halted.
84 .It Dv s Pq Dv SINGLE_USER
85 The system is running in single user mode.
87 The system is executing
89 .It Dv t Pq Dv READ_TTYS
90 The system is processing
92 .It Dv m Pq Dv MULTI_USER
93 The system is running in multi-user mode.
94 .It Dv T Pq Dv CLEAN_TTYS
95 The system is in the process of stopping processes
96 associated with terminal devices.
97 .It Dv c Pq Dv CATATONIA
98 The system is in the process of shutting down and will
99 not create new processes.
102 List only the name, line and time fields.
105 Print a character after the user name indicating the state of the
108 if the terminal is writable;
113 if a bad line is encountered.
115 Print last system clock change.
117 Print the idle time for each user, and the associated process ID.
119 When printing of more information is requested with
121 this switch can be used to also printed
122 process termination signals,
124 session id for windowing
125 and the type of the entry, see documentation of ut_type in
128 Returns the invoker's real user name.
132 gathers information from the file
136 may be specified which is usually
139 .Pa /var/log/wtmpx.[0-6]
140 depending on site policy as
142 can grow quite large and daily versions may or may not
143 be kept around after compression by
147 file contains a record of every login, logout,
148 crash, shutdown and date change
151 was last truncated or
157 is being used as the file, the user name may be empty
158 or one of the special characters '|', '}' and '~'.
159 Logouts produce an output line without any user name.
160 For more information on the
161 special characters, see
164 .Bl -tag -width /var/log/wtmpx.[0-6] -compact
165 .It Pa /var/run/utmpx
166 .It Pa /var/log/wtmpx
167 .It Pa /var/log/wtmpx.[0-6]
178 utility is expected to conform to