我选择了“最小安装”选项，因此可能没有libreoffice其他东西：
# apt list libreoffice
Listing... Done
libreoffice/focal-updates 1:6.4.6-0ubuntu0.20.04.1 amd64
ubuntu-desktop已安装：
# apt list ubuntu-desktop*
Listing... Done
ubuntu-desktop-minimal/focal-updates,now 1.450.2 amd64 [installed]
ubuntu-desktop/focal-updates,now 1.450.2 amd64 [installed]
这也没什么作用：
# apt install ubuntu-desktop --install-recommends
Reading package lists... Done
Building dependency tree
Reading state information... Done
ubuntu-desktop is already the newest version (1.450.2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
是否有包含 Ubuntu 完整安装的元包？