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Package Update Upgrade Install
------------------------------
**Summary:** update, upgrade, and install packages

This module allows packages to be updated, upgraded or installed during boot.
If any packages are to be installed or an upgrade is to be performed then the
package cache will be updated first. If a package installation or upgrade
requires a reboot, then a reboot can be performed if
``package_reboot_if_required`` is specified. A list of packages to install can
be provided. Each entry in the list can be either a package name or a list with
two entries, the first being the package name and the second being the specific
package version to install.

**Internal name:** ``cc_package_update_upgrade_install``

**Module frequency:** per instance

**Supported distros:** all

**Config keys**::

    packages:
        - pwgen
        - pastebinit
        - [libpython2.7, 2.7.3-0ubuntu3.1]
    package_update: <true/false>
    package_upgrade: <true/false>
    package_reboot_if_required: <true/false>

    apt_update: (alias for package_update)
    apt_upgrade: (alias for package_upgrade)
    apt_reboot_if_required: (alias for package_reboot_if_required)
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