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Upgrade chroot release
crouton nominally doesn't support EOL releases of distros, but feel free to file a bug and we'll try to fix things that break.
| Release name | Release # | End-Of-Life date |
|---|---|---|
precise |
12.04 LTS | will reach EOL in April 2017 |
utopic |
14.10 | reached EOL on 23 July 2015 |
vivid |
15.04 | reached EOL on 04 February 2016 |
See the Ubuntu wiki for a full list.
Since precise is on the cusp of being EOL'd (and xenial will soon be made the default release in #2833), please upgrade your precise chroot(s) as shown below or install a new one with -r xenial.
You can use this graphical method in your chroot:
Or follow these instructions in a crosh shell:
1. sudo enter-chroot -n <chroot_name>
NOTE: (replace <chroot_name> with the name of your chroot, e.g. precise)
2. sudo apt-get install update-manager-core python-apt
3. sudo do-release-upgrade
After the upgrade, whether it be by the graphical method or the command line, it is important to make sure that crouton is updated:
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sudo sh ~/Downloads/crouton -n <chroot_name>-u
By default, the name of a chroot is its release name (e.g. a precise chroot's name is precise).
After an upgrade, you end up with a xenial chroot, whose name is precise. Confusing? You can easily rename it with:
sudo edit-chroot precise -m xenial
LTS releases (e.g. precise, 12.04) are supported by Ubuntu for 5 years.
By default, they will not upgrade to non-LTS release (e.g. quantal 12.10).
If you really want to do that, edit /etc/update-manager/release-upgrades and replace Prompt=lts by Prompt=normal.
Following the Debian guide and updating the chroot should work. (untested)