last - Displays information about previous logins
/usr/bin/last [-n maxlines | -maxlines] [-f filename] [name...] [tty...]
Reads information about previous logins from filename instead of from
the accounting file /var/adm/wtmp.
Limits the output to maxlines number of record lines.
Limits the output to maxlines number of record lines. Provides SVID
conformance, and is equivalent to -maxlines.
The last command displays, in reverse chronological order, all previous
logins and logouts entered in the currently active /var/adm/wtmp file. The
list of output records can be restricted to maxlines number of record lines
if the -maxlines or the -n maxlines option is specified. The last command
also displays logins and logouts by the user specified with the name param-
eter, and logins and logouts from terminals specified with the tty parame-
ter. The tty terminal references can be fully named (for example, tty0) or
abbreviated (for example, 0). For each process, the following information
is displayed according to session, with the most recent session listed
+ Time session began
+ Duration of session
+ The tty terminal on which session took place
The following information is included when applicable:
+ Terminations when rebooting
+ Continuing sessions
If the last command is interrupted, an indication of how far the search has
progressed in the /var/adm/wtmp file is provided. If the command is inter-
rupted by a quit signal, an indication as to how far the search has pro-
gressed is provided, but the search continues.
To obtain information about the mean time between reboots, use the word
shutdown as the name parameter.
1. The following example displays all recorded logins and logouts for
user root and all recorded logins and logouts from the console termi-
last root console
2. The following example displays the time between system reboots:
% last shutdown
shutdown ~ Fri Aug 28 17:59
shutdown ~ Mon Aug 17 09:07
wtmp begins Mon Aug 17 08:51
In the previous example, the shutdown pseudouser is used to list the
mean time between system reboots.
Specifies the command path
Header file defining structures used to organize login information
The login/logout database file
Files: utmp(4), wtmp(4)