Provided by: login_4.0.13-7ubuntu3_i386
lastlog - examine lastlog file
lastlog formats and prints the contents of the last login log
/var/log/lastlog file. The login-name, port, and last login time will
be printed. The default (no flags) causes lastlog entries to be
printed, sorted by their order in /etc/passwd.
The options which apply to the lastlog command are:
-b, --before DAYS
Print only lastlog records older than DAYS.
Display help message and exit.
-t, --time DAYS
Print the lastlog records more recent than DAYS.
-u, --user LOGIN
Print the lastlog record for user with specified LOGIN only.
The -t flag overrides the use of -u.
If the user has never logged in the message ** Never logged in** will
be displayed instead of the port and time.
The lastlog file is a database which contains info on the last login of
each user. You should not rotate it. It is a sparse file, so its size
on the disk is much smaller than the one shown by "ls -l" (which can
indicate a really big file if you have a high UID). You can display its
real size with "ls -s".
lastlog logging file
Large gaps in uid numbers will cause the lastlog program to run longer
with no output to the screen (i.e. if mmdf=800 and last uid=170,
program will appear to hang as it processes uid 171-799).
Julianne Frances Haugh (email@example.com)