Distro upgrade from Debian Jessie to Stretch
Jessie and Stretch character from Pixar Toy Story movie
Upgrade the current version
Check the current version:
cat /etc/debian_version
Update the package index:
apt update
Upgrate to the latest version of Debian Jessie
apt upgrade
Change the package repository to Debian Stretch
Make a copy of the actual repository file:
cp /etc/apt/sources.list /etc/apt/sources.list_backup
Execute apt edit-sources or use your favourite text editor
to modify a current /etc/apt/sources.list file to include
stretch repositories. Simply update keyword jessie to stretch.
Example from Jessie:
deb http://http.debian.net/debian/ jessie main contrib non-free
to Stretch:
deb http://http.debian.net/debian/ stretch main contrib non-free
Upgrade the distro
Update the package list:
apt update
Then upgrade:
apt upgrade
apt dist-upgrade
Check the new version:
cat /etc/debian_version
Use a single script
#!/bin/sh
apt update
apt -y upgrade
mv /etc/apt/sources.list /etc/apt/sources.list_backup
echo "deb http://http.debian.net/debian/ stretch main contrib non-free" > /etc/apt/sources.list
apt update
apt -y dist-upgrade
