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How-upgrade-Debian6-Squeeze-Debian-7-Wheezy


How to upgrade Debian6 Squeeze to Debian 7 Wheezy?

  1. Make a backup before upgrade Debian 
  2. vi /etc/apt/sources.list replace with below:
    deb http://mirrors.kernel.org/debian/ wheezy main
    deb-src http://mirrors.kernel.org/debian/ wheezy main
     
    deb http://security.debian.org/ wheezy/updates main
    deb-src http://security.debian.org/ wheezy/updates main
     
    # wheezy-updates, previously known as 'volatile'
    deb http://mirrors.kernel.org/debian/ wheezy-updates main
    deb-src http://mirrors.kernel.org/debian/ wheezy-updates main
  3. apt-get update
    apt-get dist-upgrade

  4. check debian version via command "lsb_release -a"
    Distributor ID: Debian
    Description:    Debian GNU/Linux 7.1 (wheezy)
    Release:        7.1
    Codename:       wheezy

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