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'\" t
.\" Title: lastlog
.\" Author: Julianne Frances Haugh
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\" Date: 2014-05-09
.\" Manual: 系统管理命令
.\" Source: shadow-utils 4.2
.\" Language: Chinese Simplified
.\"
.TH "LASTLOG" "8" "2014-05-09" "shadow\-utils 4\&.2" "系统管理命令"
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.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
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.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "名称"
lastlog \- 报告所有用户的最近登录情况，或者指定用户的最近登录情况
.SH "大纲"
.HP \w'\fBlastlog\fR\ 'u
\fBlastlog\fR [\fI选项\fR]
.SH "描述"
.PP
\fBlastlog\fR
formats and prints the contents of the last login log
/var/log/lastlog
file\&. The
\fIlogin\-name\fR,
\fIport\fR, and
\fIlast login time\fR
will be printed\&. The default (no flags) causes lastlog entries to be printed, sorted by their order in
/etc/passwd\&.
.SH "选项"
.PP
\fBlastlog\fR
命令可以接受的选项有：
.PP
\fB\-b\fR, \fB\-\-before\fR\ \&\fIDAYS\fR
.RS 4
只显示老于
\fIDAYS\fR
的最近登录记录。
.RE
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
现实帮助信息并退出。
.RE
.PP
\fB\-R\fR, \fB\-\-root\fR\ \&\fICHROOT_DIR\fR
.RS 4
Apply changes in the
\fICHROOT_DIR\fR
directory and use the configuration files from the
\fICHROOT_DIR\fR
directory\&.
.RE
.PP
\fB\-t\fR, \fB\-\-time\fR\ \&\fIDAYS\fR
.RS 4
只现实新于
\fIDAYS\fR
的最近登录记录。
.RE
.PP
\fB\-u\fR, \fB\-\-user\fR\ \&\fILOGIN\fR|\fIRANGE\fR
.RS 4
现实指定用户的最近登录记录。
.sp
The users can be specified by a login name, a numerical user ID, or a
\fIRANGE\fR
of users\&. This
\fIRANGE\fR
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)\&.
.RE
.PP
如果用户从来没有登录过，将会显示
\fI** 从未登录 **\fR
而不是端口和时间。
.PP
Only the entries for the current users of the system will be displayed\&. Other entries may exist for users that were deleted previously\&.
.SH "注意"
.PP
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 "\fBls \-l\fR" (which can indicate a really big file if you have in
passwd
users with a high UID)\&. You can display its real size with "\fBls \-s\fR"\&.
.SH "文件"
.PP
/var/log/lastlog
.RS 4
Database times of previous user logins\&.
.RE
.SH "CAVEATS"
.PP
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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