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Upgrade notifier tray icon
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This is a small tray icon that backgrounds itself and checks for
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upgrades. It must be ensured by other means (like a cron job) that a
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regular "apt-get update" is done. This is ensured by installing a
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option into /etc/apt/apt.conf.d to trigger a cron update script.
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It uses the following file from the apt package for the updating
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of the package information:
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The following files are installed as part of the update-notifier-common
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package and trigger regular the /etc/cron.daily/apt job:
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/etc/apt/apt.conf.d/10periodic
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/etc/apt/apt.conf.d/20archive
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The "10periodic" file controls how often (in days) certain actions are
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run. The most common one is: APT::Periodic::Update-Package-Lists is
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used for the "apt-get update". The header of /etc/cron.daily/apt
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contains more information of the individual options.
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The "20archive" file controls the packages (.deb) cache in
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/var/cache/apt/archives - it can be used to define a maximum total
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size for the deb files there and the time (in days) until they get
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deleted. See the header of /etc/cron.daily/apt for more details.
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It uses GIO to monitor /var/lib/apt/lists/* and
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/var/lib/update-notifier/dpkg-run-stamp. If they change it updates
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It also supports interactive hooks and reboot notification support,
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see HOOKS for details.
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It will detect if a new distribution CD is inserted.
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Additionally it has grown avahi and crash report collection
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support. Both are Ubuntu specific.
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Based on ideas of Matt Zimmerman und Jeff Waught. Tray example from
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Lukas Lipka <lukas@pmad.net>. Lot's of cleanups from Michiel Sikkes.
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