lastlog man page on ElementaryOS

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LASTLOG(8)		  System Management Commands		    LASTLOG(8)

NAME
       lastlog - reports the most recent login of all users or of a given user

SYNOPSIS
       lastlog [options]

DESCRIPTION
       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.

OPTIONS
       The options which apply to the lastlog command are:

       -b, --before DAYS
	   Print only lastlog records older than DAYS.

       -h, --help
	   Display help message and exit.

       -R, --root CHROOT_DIR
	   Apply changes in the CHROOT_DIR directory and use the configuration
	   files from the CHROOT_DIR directory.

       -t, --time DAYS
	   Print the lastlog records more recent than DAYS.

       -u, --user LOGIN|RANGE
	   Print the lastlog record of the specified user(s).

	   The users can be specified by a login name, a numerical user ID, or
	   a RANGE of users. This RANGE of users can be specified with a min
	   and max values (UID_MIN-UID_MAX), a max value (-UID_MAX), or a min
	   value (UID_MIN-).

       If the user has never logged in the message ** Never logged in** will
       be displayed instead of the port and time.

       Only the entries for the current users of the system will be displayed.
       Other entries may exist for users that were deleted previously.

NOTE
       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 usually much smaller than the one shown by "ls -l"
       (which can indicate a really big file if you have in passwd users with
       a high UID). You can display its real size with "ls -s".

FILES
       /var/log/lastlog
	   Database times of previous user logins.

CAVEATS
       Large gaps in UID numbers will cause the lastlog program to run longer
       with no output to the screen (i.e. if in lastlog database there is no
       entries for users with UID between 170 and 800 lastlog will appear to
       hang as it processes entries with UIDs 171-799).

shadow-utils 4.1.5.1		  02/17/2014			    LASTLOG(8)
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