Debian 10 to 11 » History » Revision 4
Revision 3 (Jamila Khan, 12/21/2021 05:04 PM) → Revision 4/19 (Jamila Khan, 12/22/2021 04:05 PM)
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h1. Debian 10 to 11
h2. Pre update check
h3. Stretch check
Check if any sources still point to stretch
<pre>
cd /etc/apt
grep -nr stretch .
</pre>
If so, bring those up to buster and run updates first
https://redmine.palantetech.coop/projects/commons/wiki/Debian_9_to_10
h3. Metapackage check
Check to make sure kernel metapackage is installed, not just specific kernel
@dpkg -l "linux-image*" | grep ^ii | grep -i meta@ should have results
If not, install metapackage
https://www.debian.org/releases/bullseye/amd64/release-notes/ch-upgrading.en.html#kernel-metapackage
h3. Purged package check
List and purge removed packages with config files remaining
https://www.debian.org/releases/bullseye/amd64/release-notes/ch-upgrading.en.html#purge-removed-packages
<pre>
aptitude search '~c'
aptitude purge '~c'
</pre>
h3. Hold check
These commands should have no results
<pre>
aptitude search "~ahold"
dpkg --get-selections | grep 'hold$'
</pre>
h2. Update sources list
Check which sources exist that point to buster
<pre>
cd /etc/apt
grep -nr buster .
</pre>
Edit the main list, and any others that come up
<pre>
vim /etc/apt/sources.list
</pre>
replace buster with bullseye
<pre>
:%s/buster/bullseye/g
</pre>
replace bullseye/updates with bullseye-security
<pre>
:%s/bullseye\/updates/bullseye-security/g
</pre>
https://www.debian.org/releases/bullseye/amd64/release-notes/ch-information.en.html#security-archive
h2. Upgrade the system
h3. Check for Necessary Disk Space
<pre>apt-get -o APT::Get::Trivial-Only=true dist-upgrade</pre>
h3. Update the sources
<pre>
apt-get update
</pre>
h3. Minimal Upgrade
<pre> apt-get upgrade</pre>
* if it asks whether to change /etc/apt/trusted.gpg.d/debian-archive-jessie-security-automatic.gpg, say yes
* other things it asks to change, say no, keep the existing file
h3. Full Upgrade
<pre>
apt-get dist-upgrade
</pre>
h3. Upgrade MySQL databases (if MySQL/MariaDB installed)
<pre>
mysql_upgrade
</pre>
h3. Check that things are up
* if a web server, make sure websites are up
* if an infrastructure server, test and make sure all parts of the infrastructure are working properly
* if a PTC server check the "recovery plan":https://redmine.palantetech.coop/projects/pt/wiki/Recovery_Plan entry for that server to make sure everything has recovered
h3. Check what packages were removed
* @cat /var/log/apt/history.log | grep Remove@
* make sure there was nothing important in there
h2. Common problems
tbd
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