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lastlogin(8) [netbsd man page]

LASTLOGIN(8)						    BSD System Manager's Manual 					      LASTLOGIN(8)

NAME
lastlogin -- indicate last login time of users SYNOPSIS
lastlogin [-nrt] [-f filename] [-H hostsize] [-L linesize] [-N namesize] [user ...] DESCRIPTION
lastlogin will list the last login session of specified users, or for all users by default. Each line of output contains the user name, the tty from which the session was conducted, any hostname, and the start time for the session. If multiple users are given, the session information for each user is printed in the order given on the command line. Otherwise, information for all users is printed, sorted by uid. lastlogin differs from last(1) in that it only prints information regarding the very last login session. The last login database is never turned over or deleted in standard usage. The following options are available: -f filename Process input from filename. If the file ends with an ``x'', then it is assumed that it is a lastlogx(5) file, else it is assumed to be a lastlog(5) file. -H hostlen Set the field width for host output to hostlen characters. -L linelen Set the field width for line output to linelen characters. -N namelen Set the field width for name output to namelen characters. -n Attempt to print numeric host addresses. This option is only supported with lastlogx(5) format files. -r Reverse the order of the sort. -t Sort by last login time (most recent first.) FILES
/var/log/lastlogx default last login database /var/log/lastlog compatibility last login database EXAMPLES
lastlogin looks by default to the /var/log/lastlogx database, where some old programs that are not utmpx(5) aware might only write to /var/log/lastlog. To look at the old database one can use: lastlogin -f /var/log/lastlog SEE ALSO
last(1), lastlog(5), lastlogx(5), ac(8) AUTHORS
John M. Vinopal wrote this program in January 1996 and contributed it to the NetBSD project. BSD
March 4, 2005 BSD

Check Out this Related Man Page

UTMP(5) 						      BSD File Formats Manual							   UTMP(5)

NAME
utmp, wtmp, lastlog -- login records SYNOPSIS
#include <utmp.h> DESCRIPTION
The file <utmp.h> declares the structures used to record information about current users in the file utmp, logins and logouts in the file wtmp, and last logins in the file lastlog. The time stamps of date changes, shutdowns and reboots are also logged in the wtmp file. The wtmp file can grow rapidly on busy systems, and is normally rotated with newsyslog(8). These files must be created manually; if they do not exist, they are not created automatically. #define _PATH_UTMP "/var/run/utmp" #define _PATH_WTMP "/var/log/wtmp" #define _PATH_LASTLOG "/var/log/lastlog" #define UT_NAMESIZE 8 #define UT_LINESIZE 8 #define UT_HOSTSIZE 16 struct lastlog { time_t ll_time; char ll_line[UT_LINESIZE]; char ll_host[UT_HOSTSIZE]; }; struct utmp { char ut_line[UT_LINESIZE]; char ut_name[UT_NAMESIZE]; char ut_host[UT_HOSTSIZE]; time_t ut_time; }; Each time a user logs in, the login(1) program looks up the user's UID in the file lastlog. If it is found, the timestamp of the last time the user logged in, the terminal line and the hostname are written to the standard output, providing the login is not set quiet; see login(1). The login(1) program then records the new login time in the file lastlog. After the new lastlog record is written, the file utmp is opened and the utmp record for the user inserted. This record remains there until the user logs out at which time it is deleted (by clearing the user and host fields, and updating the timestamp field). The utmp file is used by the programs rwho(1), users(1), w(1), and who(1). Next, the login(1) program opens the file wtmp, and appends the user's utmp record. When the user logs out, a utmp record with the tty line, an updated time stamp, and cleared user and host fields is appended to the file by init(8). The wtmp file is used by the programs last(1) and ac(8). In the event of a date change, a shutdown or reboot, the following items are logged in the wtmp file. reboot shutdown A system reboot or shutdown has been initiated. The character '~' is placed in the field ut_line, and reboot or shutdown in the field ut_name (see shutdown(8) and reboot(8)). date The system time has been manually or automatically updated by date(1). The command name date is recorded in the field ut_name. In the field ut_line, the character '|' indicates the time prior to the change, and the character '{' indicates the new time. FILES
/var/run/utmp The utmp file. /var/log/wtmp The wtmp file. /var/log/lastlog The lastlog file. SEE ALSO
last(1), login(1), w(1), who(1), utmpx(5), ac(8), init(8), lastlogin(8), newsyslog(8) HISTORY
A utmp and wtmp file format appeared in Version 6 AT&T UNIX. The lastlog file format appeared in 3.0BSD. BSD
May 14, 2003 BSD
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