می خواستم Cinnamon رو نصب کنم با دستورات زیر.
sudo add-apt-repository ppa:gwendal-lebihan-dev/cinnamon-stable
تا اینجا به خوبی مراحل انجام شد. اما بعد از دستور آپدیت sudo apt-get update ارورهای زیر رو می ده
W: Failed to fetch http://ppa.launchpad.net/alecive/antigone/ubuntu/dists/quantal/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/alecive/antigone/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/alza/project/ubuntu/dists/quantal/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/alza/project/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/bisigi/ppa/ubuntu/dists/quantal/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/bisigi/ppa/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/merlwiz79/cinnamon-ppa/ubuntu/dists/quantal/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/merlwiz79/cinnamon-ppa/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
اشکال کار کجاست دوستان؟ ( از وی پی ان هم استفاده کردیم, ولی حل نشد)