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h1. Debian 8 to 9

h2. Update sources list

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

<pre>
:%s/jessie/stretch/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>

h3. Full Upgrade

<pre>
apt-get dist-upgrade
</pre>

h2. Common problems

h3. iBackup

PT ticket #35194-19

header.pl and constants.pm are in the ibackup directory but perl on debian does not look in the local directory for @INC.
to fix copy both header.pl and constants.pm into /etc/perl/

h3. backupninja

until backupninja gets the fixes pushed out to the debian repo PT ticket #35353
add @partitions = no@ to job 15

h3. samba-ad-dc

if Samba is in AD-DC mode, it and winbind fail.
do these commands, then try to run the upgrade again

<pre>
systemctl stop smbd nmbd winbind
systemctl disable smbd nmbd winbind
systemctl unmask samba-ad-dc
systemctl start samba-ad-dc
systemctl enable samba-ad-dc
</pre>

https://lists.samba.org/archive/samba/2017-July/209972.html



https://www.howtoforge.com/tutorial/how-to-upgrade-debian-8-jessie-to-9-stretch/