How to upgrade Debian 6(Squeeze) to 7(Wheezy) to 8(Jessie)

edit source.list

vim /etc/apt/sources.list

Debian for v6(Squeeze) to v7(Wheezy)

deb http://ftp.debian.org/debian/ wheezy main
deb-src http://ftp.debian.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://ftp.debian.org/debian/ wheezy-updates main
deb-src http://ftp.debian.org/debian/ wheezy-updates main

ref: https://www.cyberciti.biz/faq/howto-debian-linux-upgrade-6-squeeze-to-7-wheezy/

Debian for v7(Wheezy) to v8(Jessie)

deb http://ftp.debian.org/debian/ jessie main
deb-src http://ftp.debian.org/debian/ jessie main

deb http://security.debian.org/ jessie/updates main contrib
deb-src http://security.debian.org/ jessie/updates main contrib

deb http://ftp.debian.org/debian/ jessie-updates main contrib
deb-src http://ftp.debian.org/debian/ jessie-updates main contrib

upgrade Debian

apt-get update
apt-get upgrade -y
apt-get dist-upgrade -y

#if error “There is no public key available for the following key IDs”
#fix by http://taxze.com/?p=11

reboot

#check version after reboot

cat /etc/debian_release
lsb_release -a
uname -a

How to sucessfully upgrade Debian8 to Debian9 using VestaCP
https://forum.vestacp.com/viewtopic.php?f=41&t=15452&p=63601

 January 6, 2017

 Blog | #Command #Debian

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