apt-listbugs - Lists critical bugs before each APT installation/upgrade
] [-T tags
] [-B bug#
] [ -H
] [ -p port
] [-P priority
] [-C apt.conf
is a tool which retrieves bug reports from the Debian Bug
Tracking System and lists them. In particular, it is intended to be invoked
before each installation or upgrade by APT, or other compatible package
managers, in order to check whether the installation/upgrade is safe.
In the typical use case, the user is installing or upgrading a number of
packages with APT or some other compatible package manager. Before the package
installation or upgrade is actually performed, apt-listbugs
automatically invoked: it queries the Debian Bug Tracking System for bugs (of
certain configured severities) that would be introduced into the system by the
installation or upgrade; if any such bug is found, apt-listbugs
the user and asks how to proceed. Among other things, the user has the
opportunity to continue, to abort the installation or upgrade, or to pin some
packages (so that the unsafe installation or upgrade is deferred). However,
pinning is not effective immediately, and requires restarting the APT session
(by aborting and then re-running the same APT command).
Each package pin is automatically removed by a daily cron job, as soon as the
corresponding bug is fixed in (or no longer affects) the package version
available for installation or upgrade. When the pin is removed, the
installation or upgrade of the package becomes possible again.
In order for the automatic pin removal to work correctly, the daily cron job has
to be actually executed: if the system is up and running almost 24/7, then
should suffice, otherwise, the installation of anacron
recommended. Moreover the Internet link must be working, while the cron job is
run. Finally, the APT package lists should be kept up-to-date.
-s severities , --severity severities
- Filter (and sort) bugs by severity, showing only the bugs matching
specified values. List the bug severities that you want to see, separated
by commas and in the desired order. Possible values are critical,
grave, serious, important, normal,
minor, wishlist, or the special value all to disable
filtering. Default: critical,grave,serious. The default list may be
changed by setting the AptListbugs::Severities configuration
-T tags , --tag tags
- Filter bugs by tags, showing only the bugs matching all specified values.
List the tags that you want to see, separated by commas. Default: no
filter. Possible values include confirmed,l10n to show only bugs
that have both these tags.
-S states , --stats states
- Filter (and sort) bugs by pending-state, showing only the bugs matching
specified values. List the pending-state categories that you want to see,
separated by commas and in the desired order. Default:
pending,forwarded,pending-fixed,fixed,done. Possible values are:
pending (open bug), forwarded (marked as
"forwarded"), pending-fixed (tagged as
"pending"), fixed (tagged as "fixed"),
absent (not found in this distribution/architecture), done
(resolved in some version for this distribution/architecture). Note that a
bug can only match one such state (when multiple conditions on this list
match, the later one takes priority), and that pending does not
mean "tagged as pending".
-B bug# , --bugs bug#
- Filter bugs by number, showing only the bugs directly specified. List the
bug numbers that you want to see, separated by commas (e.g.
123456,567890,135792). Default: no filter.
- Show bugs of downgraded packages. (apt mode only)
-H hostname , --hostname hostname
- Specifies the hostname of the Debian Bug Tracking System. Default:
-p port , --port port
- Specifies the port number of the web interface of the Debian Bug Tracking
System. Default: 80.
-P priority , --pin-priority priority
- Specifies Pin-Priority value. Default: 30000.
-E title , --title title
- Specifies the title of RSS output.
- Don't display progress bar. This option is assumed if stdout is not a
-C apt.conf , --aptconf apt.conf
- Specifies an additional APT configuration file to use. This file will be
read after the default APT configuration files.
- When in apt mode, assumes that you want to automatically pin all buggy
packages without any prompt. This option is assumed if stdout is not a
terminal, unless the -N command-line option is used.
- When in apt mode, never automatically pin any package without prompt. This
is the default behavior, as long as stdout is a terminal.
- Assumes that you select yes for all questions. When in apt mode, this
implies that you accept to continue with the installation/upgrade, even
when bugs are found or errors occur.
- Assumes that you select no for all questions. When in apt mode, this
implies that you want to abort the installation/upgrade, as soon as bugs
are found or errors occur. This option is assumed if stdout is not a
terminal, unless the -y command-line option is used.
- Give extra debug output, important for debugging problems. Please include
-d when reporting problems.
- Print usage help and exit.
- Print version number and exit.
- Reads package actions from a file descriptor specified in the $
APT_HOOK_INFO_FD environment variable (typically provided by APT or
other compatible package manager; Pre-Install-Pkgs hook info
protocol version 3 is expected - see apt.conf(5) for more
list [ package [: arch ][/ version ] ...]
- Reads package names from the arguments and simply lists bugs of these
packages. Package versions may be specified with a slash, as in
apt/1.0 for example. Package architectures may be specified with a
colon, as in apt:amd64 or apt:amd64/1.0 (but please note
that the Debian Bug Tracking System does not distinguish the
architectures, hence the same bugs will be listed, regardless of the
rss [ package [: arch ][/ version ] ...]
- Reads package names from the arguments and lists bugs of these packages in
RSS format. Again, package versions may be specified with a slash and
architectures with a colon.
- If this variable is set to "none", apt-listbugs will not
execute at all; this might be useful if you would like to script the use
of a program that calls apt-listbugs.
- If $http_proxy is set, the value is used for HTTP Proxy, unless
proxy settings are found in APT configuration (see below).
- File descriptor from which package actions will be read (APT or other
compatible package managers are expected to write information to this file
descriptor and to properly set this environment variable).
reads the APT configuration (see apt.conf(5)
details). The following configuration options are recognized:
- Default HTTP Proxy setting (overrides any $http_proxy environment
variable value). An empty string or the special keyword "DIRECT"
will disable proxy.
- Automatic HTTP Proxy discovery (overrides the default HTTP Proxy setting
and any $ http_proxy environment variable value). It can be used to
specify an external command that is expected to output the proxy on
- Specific HTTP Proxy setting (overrides any other proxy setting). Useful
for setting HTTP proxy for apt-listbugs. The special keyword
"DIRECT" will disable proxy.
- Default (comma-separated) list of bug severities to be shown. When this
option is not set, the list is "critical,grave,serious", unless
explicitly altered by using the -s command-line option. On the
other hand, when this option is set, the list of severities is its value,
unless explicitly altered by using the -s command-line option.
- Bugs to ignore when in apt mode. This is evaluated using Ruby regular
expressions: if the bug title matches, the bug is ignored. Default:
nothing. A possible suggested value is "FTBFS", since those bugs
tend to not affect the user.
- Maximum number of packages to be queried (on the Debian Bug Tracking
System) in a single batch. Default value is 200. The query operation is
performed in batches of at most QueryStep packages, for performance
reasons; setting a lower value may slow down apt-listbugs, but may
increase reliability on poor network links.
- Maximum number of bug reports to be queried (on the Debian Bug Tracking
System) and parsed in a single batch. Default value is 200. The query and
parse operation is performed in batches of at most ParseStep bugs,
for performance reasons; setting a lower value may slow down
apt-listbugs, but may increase reliability on poor network
[bug severity] bugs of [package] ([current version] -> [package version to be installed]) <[state of bug report]>
[bN] - [#bug] - [bug title] [(Fixed: fixed version, if it's fixed in a future version)]
[package]([number of] bugs)
important bugs of apt-listbugs (0.0.47 -> 0.0.49) <Outstanding>
b1 - #332442 - apt-listbugs: Apt-listbugs doesn't actually download any bug reports
b2 - #389903 - apt-listbugs: Does not offer to exit if timeout occurs fetching reports
- If the program ran successfully and (when in apt mode) you decided to
continue with the installation/upgrade. Or otherwise, if a SIGUSR1 was
received (for instance because you issued the command killall
- If an error occurred.
- If the program ran successfully in apt mode, but you decided to abort the
- If a SIGINT was received (for instance because you pressed [Ctrl+C]).
N.B.: When the program is invoked by APT, any non-zero exit status will cause
the installation/upgrade to be aborted.
- Version preferences file fragment for APT managed by apt-listbugs:
this is where the package pins are added by the apt-listbugs
program and removed by its daily cron job. This file is managed
automatically and there's normally no need to modify it by hand.
- Automatic list of bug numbers to be ignored by apt-listbugs: this
is where the program saves the bug numbers that the user decided to
ignore. This file is managed automatically and there's normally no need to
modify it by hand.
- User list of bug numbers and packages to be ignored by
apt-listbugs: this is where the (root) user may manually add bug
numbers or package names that apt-listbugs will ignore. This file
is only read by apt-listbugs, but never modified: the (root) user
has to edit it by hand. The format is: one bug number or package name per
line; lines whose first non-blank character is '#' are treated as comments
and skipped entirely.
/etc/apt/apt.conf and /etc/apt/apt.conf.d/*
- Default APT configuration files (see apt.conf(5) for more
- Configuration file fragment for APT containing options related to
apt-listbugs: this is the recommended place where the (root) user
may tweak the behavior of apt-listbugs, but usually no
customization is required.
2002 - 2004: apt-listbugs
was originally written by Masato Taruishi
2006 - 2008: Junichi Uekawa <email@example.com> rewrote it to handle BTS
Versioning features and the SOAP interface. The --bugs
option was added
by Francesco Poli in 2008.
2009 - 2010: apt-listbugs
was maintained by Francesco Poli
<firstname.lastname@example.org> and Ryan Niebur <email@example.com>
2011 - 2012: maintenance was carried on by Francesco Poli and Thomas Mueller
2013 - present day: apt-listbugs
has been maintained by Francesco Poli.
The latest source code is available from