/freyja-dev/unity-tweak-tool-daily/ubuntu xenial Release' does not have a Release file.W: Failed to fetch https://deb.opera.com/opera-stable/dists/stable/InRelease Connection timed out after120000 milliseconds
E: Failed to
我一直得到这个输出: ReadingDone
gnome-tweak-tool is already the newest version./gnome-shell-extensions_3.4.1~git20120508.dfd7191a-0ubuntu1~12.04~ricotz0_all.deb) ...',