ubuntu remove repository && remove ppas
vim /etc/apt/sources.list # 修改 repository
rm -i /etc/apt/sources.list.d/myppa.list # 删除 ppas
/var/lib/apt/lists huge
When you run sudo apt-get update (or use the Refresh button in a package manager),
a list of packages will get downloaded from the Ubuntu servers.
These files are then stored in /var/lib/apt/lists/.
You can safely remove the contents of that directory as it is recreated
when you refresh the package lists.
If you remove the files, but do not run apt-get update to fetch the lists,
commands like apt-cache will fail to provide information (since the cache is empty).
ubuntu 设置时区
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
How can I remove icon of uninstalled application from application lens in Dash
I had the same issue. First I uninstalled the application, then I deleted all references from the following folder:
/usr/share/applications
/usr/local/share/applications
~/.local/share/applications
Rebooted....
If not install this MENU editor:
sudo add-apt-repository ppa:caldas-lopes/ppa
sudo apt-get update
sudo apt-get install ezame
and delete unwanted icons.
How to restart X Window Server from command line?
sudo systemctl restart lightdm.service
To figure out which package provides a particular file, you can useapt-file(install it by runningsudo apt install apt-file). For the case oflibQtWebKit.so.4:
$ apt-file search libQtWebKit.so.4
libqtwebkit4: /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
libqtwebkit4: /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4.10
libqtwebkit4: /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4.10.2
If you prefer to use a web browser, go tohttp://packages.ubuntu.com, search forlibQtWebKit.so.4in "Search the contents of packages" and you will get:
File Packages
/usr/lib/aarch64-linux-gnu/libQtWebKit.so.4 libqtwebkit4 [arm64]
/usr/lib/arm-linux-gnueabihf/libQtWebKit.so.4 libqtwebkit4 [armhf]
/usr/lib/i386-linux-gnu/libQtWebKit.so.4 libqtwebkit4 [i386]
/usr/lib/powerpc-linux-gnu/libQtWebKit.so.4 libqtwebkit4 [powerpc]
/usr/lib/powerpc64le-linux-gnu/libQtWebKit.so.4 libqtwebkit4 [ppc64el]
/usr/lib/s390x-linux-gnu/libQtWebKit.so.4 libqtwebkit4 [s390x]
/usr/lib/x86_64-linux-gnu/libQtWebKit.so.4 libqtwebkit4 [amd64]