login-utils/utmpdump.1

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  18 .TH UTMPDUMP 1 "Februar 8, 2010" "" "Linux System Administrator's Manual"
  19 .SH NAME
  20 utmpdump \- dump UTMP and WTMP files in raw format
  21 .SH SYNOPSIS
  22 .B utmpdump
  23 .RB [ \-frh ]
  24 .I [ filename ]
  25 .SH DESCRIPTION
  26 \fButmpdump\fP is a simple program to dump UTMP and WTMP files
  27 in raw format, so they can be examined.
  28 \fButmpdump\fP reads from stdin unless a
  29 .I filename
  30 is passed.
  31 .SH OPTIONS
  32 .IP "\fB\-f, \-\-follow\fP"
  33 output appended data as the file grows.
  34 .IP "\fB\-r, \-\-reverse\fP
  35 Undump, write back edited login information into utmp or wtmp files.
  36 .IP "\fB\-h, \-\-help\fP"
  37 Print a help text and exit.
  38 .IP "\fB\-V, \-\-version\fP"
  39 Output version information and exit.
  40 .SH NOTES
  41 utmpdump can be useful in cases of corrupted utmp or wtmp entries.  It can dump
  42 out utmp/wtmp to an ASCII file, then that file can be edited to remove bogus
  43 entries and reintegrated, using
  44 .PP
  45 .sp 1
  46 .in +1c
  47 .nf
  48 \fButmpdump -r < ascii file > wtmp\fP
  49 .fi
  50 .in -1c
  51 .sp 1
  52 but be warned as
  53 .B utmpdump
  54 was written for debugging purpose only.
  55 .SH BUGS
  56 You may
  57 .B not
  58 use the option \fB\-r\fP as the format for the
  59 utmp/wtmp files strongly depends on the
  60 input format. This tool was
  61 .B not
  62 written for normal use but for debugging.
  63 .SH AUTHOR
  64 Michael Krapp
  65 .SH "SEE ALSO"
  66 .BR last (1),
  67 .BR w (1),
  68 .BR who (1),
  69 .BR utmp (5),