SYNOPSIScheckrestart [ -hvpan ] [ -b blacklist_file ] [ -i package_name ] [ -e pid ]
DESCRIPTIONThe 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Consequently, checkrestart is sometimes used as an audit tool to find outdated versions of libraries in use, particularly after security upgrades.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.
- -h, --help
Show the program help and exit.
- -v, --verbose
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.
- -p, --package
Only process deleted files that belong to a package, ignoring deleted files
which do not have an associated package in the package system.
- -a, --all
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
, which are known to produce false positives. It will take preceded if used
simultaneously with the
- -b file, --blacklist=file
Read a blacklist of regular expressions from
Any files matching the patterns will be ignored. More than one pattern
can be provided by using this option more than once.
- -i name, --ignore=name
Ignore services that are associated to the package name provided in
More than one package can be provided by using this option more than once.
- -e pid, --excludepid=pid
Exclude processes running with
when looking for open files. This can speed up checkrestart on systems with a
large number of open files. Note: this option only works if
is not used. More than one process identifier can be provided by
using this option more than once.
- -n, --nolsof
Do not use
even if available. In some systems where there are large number of files the
use of lsof might be inefficient. Use this option to disable lsof. Notice also
that if lsof is not installed an alternative mechanism to extract deleted files
will be used instead. Consequently, there is no need to set this option
in systems that do not have
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.
Start it as user root without parameters:
Found 20 processes using old versions of upgraded files
(15 distinct programs)
(14 distinct packages)
Of these, 12 seem to contain init scripts which can be used to restart them:
The following packages seem to have init scripts that could be used to restart them:
These are the init scripts:
service gpm restart
service rpcbind restart
service bind9 restart
service ssh restart
service ntp restart
service tftpd-hpa restart
service uptimed restart
service cron restart
service postfix restart
service hddtemp restart
service autofs restart
service openbsd-inetd restart
These processes do not seem to have an associated init script to restart them:
BUGSThis program might fail if the output of the lsof(8) 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.
If you find a false positive in checkrestart please provide the following information when submitting a bug report:
The output of checkrestart using the -v (verbose) option.
- The output of running the following command as root:
lsof | egrep 'delete|DEL|path inode'
checkrestart is also sensitive to the kernel version in use. And might fail to work with newer (or older) versions.
checkrestart was written by Matt Zimmerman for the Debian GNU/Linux distribution. It was later improved by Javier Fernandez-Sanguino with contributions from many different users and developers of the Debian GNU/Linux distribution.
COPYRIGHT AND LICENCE
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 version 2 can be found in /usr/share/common-licenses/GPL-2.