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debian:upgradewheezytojessie [2017/02/13 13:10] (current)
wadmin created
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 +====== Upgrading Wheezy to Jessie ======
  
 +procedure to upgrade Debian from Wheezy to Jessie in a few simple steps.
 +
 +Before you start with the upgrade, backup all critical data. Thats especially the config data in the /etc directory and the user data in /home. When you run a server then you should include the databases (MySQL, Postgresql, etc), web and email data in the backup as well. The backup should be stored on a external harddisk, on an external server e.g. by FTP or on a cloud drive. Here are a few examples on how to create backups with tar.
 +Backup the configuration and data
 +
 +Configuration files in the /etc directory.
 +
 +tar -pczf etc.tar.gz /etc
 +
 +Backup of the /var/www website directory.
 +
 +tar -pczf www.tar.gz /var/www
 +
 +Backup of the /home directories.
 +
 +tar -pczf home.tar.gz /home
 +
 +For ISPConfig 3 users: Backup of your email server files.
 +
 +tar -pczf vmail.tar.gz /var/vmail
 +
 +Backup MySQL databases
 +
 +mysqldump --defaults-file=/​etc/​mysql/​debian.cnf -cCeQ --hex-blob --quote-names --routines --events --triggers --all-databases -r all_databases.sql
 +
 +Then move the tar.gz and .sql files for safe storage on a backup drive.
 +
 + 
 +Check the apt sources.list file
 +
 +We will install all available Wheezy updates first before we upgrade to Jessie. On some systems the package source is defined as "​stable"​ in the sources.list file instead of "​wheezy"​ or "​jessie"​. To avoid an accidential early upgrade to Jessie, please check the sources.list now and ensure that it contains "​wheezy"​ and not "​stable"​ as source:
 +
 +Use a commandline editor like nano or vi to open /​etc/​apt/​sources.list,​ the lines should be similar to the ones below:
 +
 +nano /​etc/​apt/​sources.list
 +
 +deb http://​ftp.de.debian.org/​debian wheezy main contrib non-free
 +deb-src http://​ftp.de.debian.org/​debian wheezy main contrib non-free
 +deb http://​ftp.de.debian.org/​debian wheezy-updates main contrib non-free
 +deb http://​ftp.de.debian.org/​debian-security wheezy/​updates main contrib non-free
 +
 +Your country code is most likely not "​de",​ you should use the code of your country here. Using your country code in the file will speed up the package download.
 +
 + 
 +Update the packages for Wheezy
 +
 +The following commands will install all pending Wheezy updates. This ensures that your system is in a good shape for the update to Jessie.
 +
 +apt-get update
 +
 +Ready for first upgrade:
 +
 +apt-get upgrade
 +
 +Follow this with:
 +
 +apt-get dist-upgrade
 +
 + 
 +Check the package state to ensure that no packages are on hold or in half installed state
 +
 +This test is important, we will check the package state to ensure that no packages are on hold or in half installed state. Your system and apt database must be in a good shape before we proceed with the dist upgrade. If there are any broken or "on hold" packages, then fix these issues before the upgrade.
 +
 +Check that no packages are on hold by querying the package database with the dpkg command:
 +
 +dpkg --audit
 +dpkg --get-selections | grep hold
 +
 +When both commands did not return any packages, then proceed with the upgrade.
 +
 + 
 +Update the sources.list for Jessie
 +
 +Edit the /​etc/​apt/​sources.list file again:
 +
 +nano /​etc/​apt/​sources.list
 +
 +and replace its content with the following lines:
 +
 +deb http://​ftp.de.debian.org/​debian/​ jessie main contrib non-free
 +deb-src http://​ftp.de.debian.org/​debian/​ jessie main contrib non-free
 +
 +
 +deb http://​httpredir.debian.org/​debian jessie-updates main contrib non-free
 +deb-src http://​httpredir.debian.org/​debian jessie-updates main contrib non-free
 +
 +
 +deb http://​security.debian.org/​ jessie/​updates main contrib non-free
 +deb-src http://​security.debian.org/​ jessie/​updates main contrib non-free
 +
 +Choose your nearest locale by replacing "​de"​ with e.g. "​us"​ or your country code. Then save the file and run the following command to update the sources database:
 +
 +apt-get update
 +
 + 
 +Jessie Upgrade in two steps
 +
 +It is recommended to do the upgrade in two steps, first run "​apt-get upgrade"​ to install the base packages and then run "​apt-get dist-upgrade"​ to do the actual distribution upgrade,
 +
 +Start with the update by running this command:
 +
 +apt-get upgrade
 +
 +Next we will do the distribution upgrade by running:
 +
 +apt-get dist-upgrade
 +
 +A reboot is required to finish the upgrade and load the new kernel:
 +
 +reboot
 +Check the update
 +
 +To check which Debian version is currently installed on the system, take a look at the file /​etc/​os-release.
 +
 +cat /​etc/​os-release
 +
 +The result on an Debian Jessie system is:
/var/customers/webs/cw01/wiki/data/pages/debian/upgradewheezytojessie.txt ยท Last modified: 2017/02/13 13:10 by wadmin
 
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