Nâng cấp Debian Squeeze lên Stretch
Làm apt-get updatenhững lỗi sau: Ign http://security.debian.org squeeze/updates Release.gpg Ign http://security.debian.org/ squeeze/updates/contrib Translation-en Ign http://security.debian.org/ squeeze/updates/contrib Translation-en_GB Ign http://security.debian.org/ squeeze/updates/main Translation-en Ign http://security.debian.org/ squeeze/updates/main Translation-en_GB Ign http://security.debian.org/ squeeze/updates/non-free Translation-en Ign http://security.debian.org/ squeeze/updates/non-free Translation-en_GB Ign http://security.debian.org squeeze/updates Release Ign http://security.debian.org squeeze/updates/main Sources Ign http://security.debian.org squeeze/updates/contrib Sources Ign http://security.debian.org squeeze/updates/non-free Sources Ign …