Christian Perrier
111 lines
3.5 KiB
Plaintext
111 lines
3.5 KiB
Plaintext
'\" t
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.\" Title: lastlog
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.\" Author: Julianne Frances Haugh
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.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
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.\" Date: 05/25/2012
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.\" Manual: System Management Commands
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.\" Source: shadow-utils 4.1.5.1
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.\" Language: English
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.\"
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.TH "LASTLOG" "8" "05/25/2012" "shadow\-utils 4\&.1\&.5\&.1" "System Management Commands"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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lastlog \- reports the most recent login of all users or of a given user
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.SH "SYNOPSIS"
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.HP \w'\fBlastlog\fR\ 'u
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\fBlastlog\fR [\fIoptions\fR]
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.SH "DESCRIPTION"
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.PP
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\fBlastlog\fR
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formats and prints the contents of the last login log
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/var/log/lastlog
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file\&. The
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\fIlogin\-name\fR,
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\fIport\fR, and
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\fIlast login time\fR
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will be printed\&. The default (no flags) causes lastlog entries to be printed, sorted by their order in
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/etc/passwd\&.
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.SH "OPTIONS"
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.PP
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The options which apply to the
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\fBlastlog\fR
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command are:
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.PP
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\fB\-b\fR, \fB\-\-before\fR \fIDAYS\fR
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.RS 4
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Print only lastlog records older than
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\fIDAYS\fR\&.
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.RE
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.PP
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\fB\-h\fR, \fB\-\-help\fR
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.RS 4
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Display help message and exit\&.
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.RE
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.PP
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\fB\-R\fR, \fB\-\-root\fR \fICHROOT_DIR\fR
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.RS 4
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Apply changes in the
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\fICHROOT_DIR\fR
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directory and use the configuration files from the
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\fICHROOT_DIR\fR
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directory\&.
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.RE
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.PP
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\fB\-t\fR, \fB\-\-time\fR \fIDAYS\fR
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.RS 4
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Print the lastlog records more recent than
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\fIDAYS\fR\&.
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.RE
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.PP
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\fB\-u\fR, \fB\-\-user\fR \fILOGIN\fR|\fIRANGE\fR
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.RS 4
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Print the lastlog record of the specified user(s)\&.
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.sp
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The users can be specified by a login name, a numerical user ID, or a
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\fIRANGE\fR
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of users\&. This
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\fIRANGE\fR
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of users can be specified with a min and max values (\fIUID_MIN\-UID_MAX\fR), a max value (\fI\-UID_MAX\fR), or a min value (\fIUID_MIN\-\fR)\&.
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.RE
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.PP
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If the user has never logged in the message
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\fI** Never logged in**\fR
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will be displayed instead of the port and time\&.
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.PP
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Only the entries for the current users of the system will be displayed\&. Other entries may exist for users that were deleted previously\&.
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.SH "NOTE"
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.PP
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The
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lastlog
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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 "\fBls \-l\fR" (which can indicate a really big file if you have in
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passwd
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users with a high UID)\&. You can display its real size with "\fBls \-s\fR"\&.
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.SH "FILES"
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.PP
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/var/log/lastlog
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.RS 4
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Database times of previous user logins\&.
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.RE
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.SH "CAVEATS"
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.PP
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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)\&.
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