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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:30:35 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:30:35 +0000 |
commit | 378c18e5f024ac5a8aef4cb40d7c9aa9633d144c (patch) | |
tree | 44dfb6ca500d32cabd450649b322a42e70a30683 /login-utils/utmpdump.1 | |
parent | Initial commit. (diff) | |
download | util-linux-378c18e5f024ac5a8aef4cb40d7c9aa9633d144c.tar.xz util-linux-378c18e5f024ac5a8aef4cb40d7c9aa9633d144c.zip |
Adding upstream version 2.38.1.upstream/2.38.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'login-utils/utmpdump.1')
-rw-r--r-- | login-utils/utmpdump.1 | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/login-utils/utmpdump.1 b/login-utils/utmpdump.1 new file mode 100644 index 0000000..52d5e61 --- /dev/null +++ b/login-utils/utmpdump.1 @@ -0,0 +1,100 @@ +'\" t +.\" Title: utmpdump +.\" Author: [see the "AUTHOR(S)" section] +.\" Generator: Asciidoctor 2.0.15 +.\" Date: 2022-05-11 +.\" Manual: User Commands +.\" Source: util-linux 2.38.1 +.\" Language: English +.\" +.TH "UTMPDUMP" "1" "2022-05-11" "util\-linux 2.38.1" "User Commands" +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.ss \n[.ss] 0 +.nh +.ad l +.de URL +\fI\\$2\fP <\\$1>\\$3 +.. +.als MTO URL +.if \n[.g] \{\ +. mso www.tmac +. am URL +. ad l +. . +. am MTO +. ad l +. . +. LINKSTYLE blue R < > +.\} +.SH "NAME" +utmpdump \- dump UTMP and WTMP files in raw format +.SH "SYNOPSIS" +.sp +\fButmpdump\fP [options] \fIfilename\fP +.SH "DESCRIPTION" +.sp +\fButmpdump\fP is a simple program to dump UTMP and WTMP files in raw format, so they can be examined. \fButmpdump\fP reads from stdin unless a \fIfilename\fP is passed. +.SH "OPTIONS" +.sp +\fB\-f\fP, \fB\-\-follow\fP +.RS 4 +Output appended data as the file grows. +.RE +.sp +\fB\-o\fP, \fB\-\-output\fP \fIfile\fP +.RS 4 +Write command output to \fIfile\fP instead of standard output. +.RE +.sp +\fB\-r\fP, \fB\-\-reverse\fP +.RS 4 +Undump, write back edited login information into the utmp or wtmp files. +.RE +.sp +\fB\-h\fP, \fB\-\-help\fP +.RS 4 +Display help text and exit. +.RE +.sp +\fB\-V\fP, \fB\-\-version\fP +.RS 4 +Print version and exit. +.RE +.SH "NOTES" +.sp +\fButmpdump\fP can be useful in cases of corrupted utmp or wtmp entries. It can dump out utmp/wtmp to an ASCII file, which can then be edited to remove bogus entries, and reintegrated using: +.RS 3 +.ll -.6i +.sp +\fButmpdump \-r < ascii_file > wtmp\fP +.br +.RE +.ll +.sp +But be warned, \fButmpdump\fP was written for debugging purposes only. +.SS "File formats" +.sp +Only the binary version of the \fButmp\fP(5) is standardised. Textual dumps may become incompatible in future. +.sp +The version 2.28 was the last one that printed text output using \fBctime\fP(3) timestamp format. Newer dumps use millisecond precision ISO\-8601 timestamp format in UTC\-0 timezone. Conversion from former timestamp format can be made to binary, although attempt to do so can lead the timestamps to drift amount of timezone offset. +.SH "BUGS" +.sp +You may \fBnot\fP use the \fB\-r\fP option, as the format for the utmp/wtmp files strongly depends on the input format. This tool was \fBnot\fP written for normal use, but for debugging only. +.SH "AUTHORS" +.sp +Michael Krapp +.SH "SEE ALSO" +.sp +\fBlast\fP(1), +\fBw\fP(1), +\fBwho\fP(1), +\fButmp\fP(5) +.SH "REPORTING BUGS" +.sp +For bug reports, use the issue tracker at \c +.URL "https://github.com/util\-linux/util\-linux/issues" "" "." +.SH "AVAILABILITY" +.sp +The \fButmpdump\fP command is part of the util\-linux package which can be downloaded from \c +.URL "https://www.kernel.org/pub/linux/utils/util\-linux/" "Linux Kernel Archive" "."
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