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       checkrestart  -  check  which  processes  need to be restarted after an


       checkrestart [ -hvpa ]


       The checkrestart program tries to determine if there are  processes  in
       the  system  that  need to be restarted after a system upgrade. This is
       necessary since an upgrade will usually bring new system libraries  and
       running  processes  will  be  still  using  the  old  versions  of  the
       libraries. In stable Debian GNU/Linux systems this is typically  needed
       to eliminate a system exposure to a vulnerability which might have been
       fixed by upgrading a library which that process makes use of.

       Consequently, checkrestart is sometimes used as an audit tool  to  find
       outdated  versions  of  libraries  in  use, particularly after security
       upgrades. Administrators  should  not,  however,  rely  on  its  output
       completely (see BUGS below).

       This  script needs to run as root in order to obtain the information it
       needs for analysis.


              Show the program help and exit.

              Generate detailed output. This output includes the list  of  all
              processes  found  using  deleted files or descriptors as well as
              the deleted files and descriptors found.

              Only process deleted files that belong to  a  package,  ignoring
              deleted  files  which  do  not have an associated package in the
              package system.

              Process all deleted files regardless of location. This makes the
              program  analyse  deleted  files even if they would be discarded
              because they are located in locations, such as /tmp , which  are
              known  to produce false positives. It will take preceded if used
              simultaneously with the -p option.


       The program will exit with error (1) if a non-root user  tries  to  run
       it. Otherwise, it will always exit with error status 0.


       This program might fail if the output of the lsof utility changes since
       it depends on it to detect which deleted files are used  by  processes.
       It  might  also output some false positives depending on the processes’
       behaviour since it does not check yet if the (deleted) files in use are
       really libraries.

       Checkrestart  is also sensitive to the kernel version in use. And might
       fail to work with newer (or older) versions.

       A rewrite to make  it  less  dependent  on  lsof  could  improve  this,




       checkrestart  was  written  by  Matt Zimmerman for the Debian GNU/Linux


       Copyright (C) 2001 Matt Zimmerman <>

       This program is free software; you can redistribute it and/or modify it
       under  the  terms of the GNU General Public License as published by the
       Free Software Foundation; either version 2, or  (at  your  option)  any
       later version.

       On  Debian  systems,  a  copy  of the GNU General Public License may be
       found in /usr/share/common-licenses/GPL.