سلام،
من پس از هر بار استفاده از sudo apt-get update، با خطا مواجه میشوم! :(
این هم انتهای خروجی این دستور هستش:
W: Failed to fetch http://ppa.launchpad.net/mgroup/ppa/ubuntu/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/mgroup/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/mozillateam/firefox-stable/ubuntu/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/mozillateam/firefox-stable/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/ubun-tor/ppa/ubuntu/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/ubun-tor/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
ضمناً پس از هر بار استفاده از update manager، در انتهای update هم با خطا مواجه میشم . . . !
اگر ممکنه راهنمایی بفرمایید!