> A question about kernels, what are linux-generic-headers packages, and why
are they sometimes held back when I run sudo apt-get upgrade?
Apparently they're used to build third-party modules for your kernel.
Sometimes you need to dist-upgrade instead. From the manual page of
apt-get(8):
upgrade upgrade is used to install the newest versions of all packages
currently installed on the system from the sources enumerated in
/etc/apt/sources.list. Packages currently installed with new versions
available are retrieved and upgraded; under no circumstances are currently
installed packages removed, or packages not already installed retrieved and
installed. New versions of currently installed packages that cannot be
upgraded without
changing the install status of another package will be left at their current
version. An update must be performed first so that apt-get knows that new
versions of packages are available.
dist-upgrade in addition to performing the function of upgrade, also
intelligently handles changing dependencies with new versions of packages;
apt-get has a "smart" conflict resolution system, and it will attempt to
upgrade the most important packages at the expense of less important ones if
necessary. So, dist-upgrade command may remove some packages. The
/etc/apt/sources.list file contains a list of locations from which to
retrieve desired package files. See also apt_preferences(5) for a mechanism
for overriding the general settings for individual packages.
