Copyright 1989 AT&T
Copyright (c) 2004 Sun Microsystems, Inc. All Rights Reserved.
Copyright (c) 2017 Olaf Bohlen
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
last [-a] [-l] [-n number | -number] [-f filename] [name | tty]...
The last command looks in the /var/adm/wtmpx file, which records all logins and logouts, for information about a user, a terminal, or any group of users and terminals. Arguments specify names of users or terminals of interest. If multiple arguments are given, the information applicable to any of the arguments is printed. For example, last root console lists all of root's sessions, as well as all sessions on the console terminal. last displays the sessions of the specified users and terminals, most recent first, indicating the times at which the session began, the duration of the session, and the terminal on which the session took place. last also indicates whether the session is continuing or was cut short by a reboot.
The pseudo-user reboot logs in when the system is shutdown and when it reboots. Thus,
last reboot
gives an approximate record of when the operating system instance was shutdown and when it rebooted. This can be used to calculate the availability of the operating system over time.
last with no arguments displays a record of all logins and logouts, in reverse order.
If last is interrupted, it indicates how far the search has progressed in /var/adm/wtmpx. If interrupted with a quit signal (generated by a CTRL-\e), last indicates how far the search has progressed, and then continues the search.
The following options are supported: -a
Displays the hostname in the last column.
Displays timestamps with seconds and years.
Limits the number of entries displayed to that specified by number. These options are identical; the -number option is provided as a transition tool only and is removed in future releases.
Date and time format is based on locale specified by the LC_ALL, LC_TIME, or LANG environments, in that order of priority.
accounting file
utmpx(4), attributes(5)