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h1. Debian 9 to 10

h2. Update sources list

check which sources exist that point to stretch
<pre>
cd /etc/apt
grep -nr stretch .
</pre>

Edit the main list, and any others that come up

<pre>
vim /etc/apt/sources.list
</pre>

<pre>
:%s/stretch/buster/g
</pre>

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

h2. Common problems

h3. borg

* Changes needed to the borg backupninja jobs #48568-1
** need to add @encryption = none@ just above the passphrase
** change the path to the directory to be the complete full path, not use the tilde for home, and must start with a slash

h3. mysql backup checking

Newest version of mariadb doesn't have separate databases for information schema or performance schema, so remove the old backups of those.

<pre>
cd /var/backups/mysql/sqldump
rm information_schema.sql.gz
rm performance_schema.sql.gz
</pre>

h3. Icinga2

Need to re-replace the backupninja binary in /usr/sbin/backupninja https://redmine.palantetech.coop/projects/pt/wiki/Icinga2#Backupninja-monitoring

h3. bang check

If using a script to check bang via @wp@, make sure the script uses the full path to @/usr/local/bin/wp@