Upgrade linux mint in-place using apt - Linux Mint Community

Upgrade linux mint in-place using apt - Linux Mint Community: "# Open a terminal and run 'sudo bash' to get a root terminal
# Using a text editor (as root), replace the contents of /etc/apt/sources.list with the following sources list: http://pastebin.com/wVGb13y3 (extracted from Linux Mint 9)
# Run 'apt-get update'
# Run 'apt-get dist-upgrade'
# Follow the instructions issued, don't worry about overwriting configuration files dpkg will keep a copy in the same directory with the string '.dpkg-old' appended to the filename
# Run 'apt-get upgrade'
# Reboot"