如何在 Ubuntu Mate 15.04 上设置 Compose Key？
我试过System -> Preferences -> Other -> Keyboard Shortcut，但我在那里找不到任何东西。
我想获得手动安装的软件包列表，snap并能够找出系统安装程序是否手动安装了 foobar 软件包。
例如：
$ snap list
Name Version Rev Tracking Publisher Notes
canonical-livepatch 9.5.5 95 latest/stable canonical? -
core 16-2.45.2 9665 latest/stable canonical? core
core18 20200707 1880 latest/stable canonical? base
discord 0.0.10 109 latest/stable snapcrafters -
gnome-3-28-1804 3.28.0-17-gde3d74c.de3d74c 128 latest/stable canonical? -
gnome-3-34-1804 0+git.3009fc7 36 latest/stable/… canonical? -
gtk-common-themes 0.1-36-gc75f853 1506 latest/stable/… canonical? -
ripgrep 12.1.0 9 latest/stable icey classic
simplenote 1.20.0 368 latest/stable snapcrafters -
slack 4.7.0 25 latest/stable slack? classic
snap-store 3.36.0-80-g208fd61 467 latest/stable/… canonical? …