不久前，我安装了 Pop! OS gtk 主题，但过了一段时间又将其删除了。
现在我发现，我安装的许多软件包在其版本信息中仍然引用“pop”。当我这样做时，dpkg -l | grep pop我看到：
ii accountsservice 0.6.55-0ubuntu10pop0 amd64 query and manipulate user account information
ii gdm3 3.34.1-1ubuntu1pop0~1571429866~19.10~5585283 amd64 GNOME Display Manager
ii gir1.2-accountsservice-1.0 0.6.55-0ubuntu10pop0 amd64 GObject introspection data for AccountService
ii gir1.2-gdm-1.0:amd64 3.34.1-1ubuntu1pop0~1571429866~19.10~5585283 amd64 GObject introspection data for the GNOME Display Manager
ii gir1.2-goa-1.0:amd64 3.34.0-1ubuntu1pop1~1569353626~19.10~43e178f amd64 Introspection data for GNOME Online Accounts
ii gir1.2-mutter-5:amd64 3.34.1-1ubuntu1pop1 amd64 GObject introspection data for Mutter
ii gnome-control-center-data 1:3.34.1-1ubuntu2pop1~1571679625~19.10~ef2ab1f all configuration applets for GNOME - data files
ii gnome-control-center-faces 1:3.34.1-1ubuntu2pop1~1571679625~19.10~ef2ab1f all utilities to configure the GNOME desktop - faces images
ii gnome-online-accounts 3.34.0-1ubuntu1pop1~1569353626~19.10~43e178f amd64 service to manage online accounts for the GNOME desktop
ii gnome-settings-daemon 3.34.1-1ubuntu1pop0~1571080815~19.10~d7a3d94 amd64 daemon handling the GNOME session settings
ii gnome-settings-daemon-common 3.34.1-1ubuntu1pop0~1571080815~19.10~d7a3d94 all daemon handling the GNOME session settings - common files
ii gnome-shell 3.34.1-1ubuntu1pop0~1570641486~19.10~c85fb3f amd64 graphical shell for the GNOME desktop
ii gnome-shell-common 3.34.1-1ubuntu1pop0~1570641486~19.10~c85fb3f all common files for the GNOME graphical shell
ii initramfs-tools 0.133ubuntu10pop0 all generic modular initramfs generator (automation)
ii initramfs-tools-bin 0.133ubuntu10pop0 amd64 binaries used by initramfs-tools
ii initramfs-tools-core 0.133ubuntu10pop0 all generic modular initramfs generator (core tools)
ii libaccountsservice0:amd64 0.6.55-0ubuntu10pop0 amd64 query and manipulate user account information - shared libraries
ii libgdm1 3.34.1-1ubuntu1pop0~1571429866~19.10~5585283 amd64 GNOME Display Manager (shared library)
ii libgoa-1.0-0b:amd64 3.34.0-1ubuntu1pop1~1569353626~19.10~43e178f amd64 library for GNOME Online Accounts
ii libgoa-1.0-common 3.34.0-1ubuntu1pop1~1569353626~19.10~43e178f all library for GNOME Online Accounts - common files
ii libgoa-backend-1.0-1:amd64 3.34.0-1ubuntu1pop1~1569353626~19.10~43e178f amd64 backend library for GNOME Online Accounts
ii libmutter-5-0:amd64 3.34.1-1ubuntu1pop1 amd64 window manager library from the Mutter window manager
ii libnss-systemd:amd64 242-7ubuntu3pop0~1571329600~19.10~ba0f258 amd64 nss module providing dynamic user and group name resolution
ii libpam-systemd:amd64 242-7ubuntu3pop0~1571329600~19.10~ba0f258 amd64 system and service manager - PAM module
ii libsystemd0:amd64 242-7ubuntu3pop0~1571329600~19.10~ba0f258 amd64 systemd utility library
ii libudev1:amd64 242-7ubuntu3pop0~1571329600~19.10~ba0f258 amd64 libudev shared library
ii libudev1:i386 242-7ubuntu3pop0~1571329600~19.10~ba0f258 i386 libudev shared library
ii mutter 3.34.1-1ubuntu1pop1 amd64 Example window manager using GNOME's window manager library
ii mutter-common 3.34.1-1ubuntu1pop1 all shared files for the Mutter window manager
这可能是因为我在安装时添加了 pop repo，如下所示：
sudo add-apt-repository ppa:system76/pop
后来我删除了 repo
sudo rm /etc/apt/sources.list.d/system76-ubuntu-pop-eoan.list
我的问题是：
- 我应该将这些包重置为它们的 ubuntu 版本吗？
- 如果是这样，是否有一种简单的方法可以做到这一点，而不是从一个包到另一个包？
答案1
sudo apt install ppa-purge
再次绑定 repo。
删除使用
sudo ppa-purge ppa:system76/pop
这将禁用 ppa 并将软件包版本设置回 ubuntu one 的