我可以看到有 64 个软件包可用，但由于某种原因我无法安装它们。我是 Linux 新手。我该怎么办？
xxxxxx@xxxxxx:~$ sudo apt update
Hit:1 http://in.archive.ubuntu.com/ubuntu impish InRelease
Hit:2 http://in.archive.ubuntu.com/ubuntu impish-updates InRelease
Hit:3 http://in.archive.ubuntu.com/ubuntu impish-backports InRelease
Hit:4 http://in.archive.ubuntu.com/ubuntu hirsute InRelease
Hit:5 http://in.archive.ubuntu.com/ubuntu hirsute-updates InRelease
Hit:6 http://in.archive.ubuntu.com/ubuntu hirsute-backports InRelease
Hit:7 http://archive.ubuntu.com/ubuntu impish InRelease
Hit:8 https://dl.google.com/linux/chrome/deb stable InRelease
Hit:9 http://security.ubuntu.com/ubuntu impish-security InRelease
Hit:10 http://archive.canonical.com/ubuntu impish InRelease
Hit:11 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:12 http://security.ubuntu.com/ubuntu hirsute-security InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
64 packages can be upgraded. Run 'apt list --upgradable' to see them.
xxxxxx@xxxxxx:~$ sudo apt list --upgradable
Listing... Done
evolution-data-server/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
ffmpeg/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
ghc-prof/impish 8.8.4-2build2 amd64 [upgradable from: 8.8.4-2]
ghc/impish 8.8.4-2build2 amd64 [upgradable from: 8.8.4-2]
gir1.2-gweather-3.0/impish 40.0-3 amd64 [upgradable from: 3.36.1-2]
gjs/impish 1.68.4-1 amd64 [upgradable from: 1.67.2-2ubuntu1]
gnome-calendar/impish 41.0-1 amd64 [upgradable from: 3.38.2-1build1]
gnome-settings-daemon-common/impish,impish 40.0.1-1ubuntu3 all [upgradable from: 3.38.1-3ubuntu3.1]
gnome-settings-daemon/impish 40.0.1-1ubuntu3 amd64 [upgradable from: 3.38.1-3ubuntu3.1]
gnome-shell-common/impish,impish 40.5-1ubuntu2 all [upgradable from: 3.38.4-1ubuntu3~21.04.1]
gnome-shell-extension-prefs/impish 40.5-1ubuntu2 amd64 [upgradable from: 3.38.4-1ubuntu3~21.04.1]
gnome-shell-extension-ubuntu-dock/impish,impish 70~ubuntu3 all [upgradable from: 69ubuntu1]
gnome-shell-extensions/impish,impish 40.4-2 all [upgradable from: 3.38.2-1]
gnome-shell/impish 40.5-1ubuntu2 amd64 [upgradable from: 3.38.4-1ubuntu3~21.04.1]
guile-2.2-libs/impish 2.2.7+1-6build1 amd64 [upgradable from: 2.2.7+1-5.4]
libavcodec58/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libavdevice58/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libavfilter7/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libavformat58/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libavutil56/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libcamel-1.2-62/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libebackend-1.2-10/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libebook-1.2-20/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libebook-contacts-1.2-3/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libecal-2.0-1/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libedata-book-1.2-26/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libedata-cal-2.0-1/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libedataserver-1.2-26/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libedataserverui-1.2-3/impish 3.40.4-1 amd64 [upgradable from: 3.40.0-1ubuntu1.1]
libffi-dev/impish 3.4.2-1ubuntu5 amd64 [upgradable from: 3.4~20200819gead65ca871-0ubuntu5]
libgirepository-1.0-1/impish 1.68.0-1build2 amd64 [upgradable from: 1.66.1-1build1]
libgjs0g/impish 1.68.4-1 amd64 [upgradable from: 1.67.2-2ubuntu1]
libglib-object-introspection-perl/impish 0.049-1build1.1 amd64 [upgradable from: 0.049-1build1]
libglib2.0-0/impish 2.68.4-1ubuntu1 amd64 [upgradable from: 2.68.1-1~ubuntu21.04.1]
libglib2.0-bin/impish 2.68.4-1ubuntu1 amd64 [upgradable from: 2.68.1-1~ubuntu21.04.1]
libglib2.0-dev-bin/impish 2.68.4-1ubuntu1 amd64 [upgradable from: 2.68.1-1~ubuntu21.04.1]
libglib2.0-dev/impish 2.68.4-1ubuntu1 amd64 [upgradable from: 2.68.1-1~ubuntu21.04.1]
libgweather-3-16/impish 40.0-3 amd64 [upgradable from: 3.36.1-2]
libllvm12/impish 1:12.0.1-8build1 amd64 [upgradable from: 1:12.0.0-3ubuntu1~21.04.2]
libp11-kit0/impish 0.23.22-1build1 amd64 [upgradable from: 0.23.22-1]
libpostproc55/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libpython2.7-minimal/impish 2.7.18-8build1 amd64 [upgradable from: 2.7.18-6]
libpython2.7-stdlib/impish 2.7.18-8build1 amd64 [upgradable from: 2.7.18-6]
libpython3.9-minimal/impish 3.9.7-2build1 amd64 [upgradable from: 3.9.5-3ubuntu0~21.04.1]
libpython3.9-stdlib/impish 3.9.7-2build1 amd64 [upgradable from: 3.9.5-3ubuntu0~21.04.1]
libpython3.9/impish 3.9.7-2build1 amd64 [upgradable from: 3.9.5-3ubuntu0~21.04.1]
libqt5webengine-data/impish,impish 5.15.6+dfsg-1 all [upgradable from: 5.15.3+dfsg-5ubuntu1]
libqt5webengine5/impish 5.15.6+dfsg-1 amd64 [upgradable from: 5.15.3+dfsg-5ubuntu1]
libqt5webenginecore5/impish 5.15.6+dfsg-1 amd64 [upgradable from: 5.15.3+dfsg-5ubuntu1]
libswresample3/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libswscale5/impish 7:4.4-6ubuntu5 amd64 [upgradable from: 7:4.3.2-0+deb11u1ubuntu1]
libwayland-client0/impish 1.19.0-2build1 amd64 [upgradable from: 1.18.0-2~exp1.1]
libwayland-server0/impish 1.19.0-2build1 amd64 [upgradable from: 1.18.0-2~exp1.1]
p11-kit-modules/impish 0.23.22-1build1 amd64 [upgradable from: 0.23.22-1]
p11-kit/impish 0.23.22-1build1 amd64 [upgradable from: 0.23.22-1]
python2.7-minimal/impish 2.7.18-8build1 amd64 [upgradable from: 2.7.18-6]
python2.7/impish 2.7.18-8build1 amd64 [upgradable from: 2.7.18-6]
python3-cffi-backend/impish 1.14.6-1build1 amd64 [upgradable from: 1.14.5-1]
python3-gi-cairo/impish 3.40.1-1build1 amd64 [upgradable from: 3.38.0-4]
python3-gi/impish 3.40.1-1build1 amd64 [upgradable from: 3.38.0-4]
python3.9-minimal/impish 3.9.7-2build1 amd64 [upgradable from: 3.9.5-3ubuntu0~21.04.1]
python3.9/impish 3.9.7-2build1 amd64 [upgradable from: 3.9.5-3ubuntu0~21.04.1]
qml-module-qtwebengine/impish 5.15.6+dfsg-1 amd64 [upgradable from: 5.15.3+dfsg-5ubuntu1]
yaru-theme-gnome-shell/impish,impish 21.10.2 all [upgradable from: 21.04.1]
xxxxxx@xxxxxx:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
evolution-data-server ffmpeg ghc ghc-prof gir1.2-gweather-3.0 gjs
gnome-calendar gnome-settings-daemon gnome-settings-daemon-common
gnome-shell gnome-shell-common gnome-shell-extension-prefs
gnome-shell-extension-ubuntu-dock gnome-shell-extensions guile-2.2-libs
libavcodec58 libavdevice58 libavfilter7 libavformat58 libavutil56
libcamel-1.2-62 libebackend-1.2-10 libebook-1.2-20 libebook-contacts-1.2-3
libecal-2.0-1 libedata-book-1.2-26 libedata-cal-2.0-1 libedataserver-1.2-26
libedataserverui-1.2-3 libffi-dev libgirepository-1.0-1 libgjs0g
libglib-object-introspection-perl libglib2.0-0 libglib2.0-bin libglib2.0-dev
libglib2.0-dev-bin libgweather-3-16 libllvm12 libp11-kit0 libpostproc55
libpython2.7-minimal libpython2.7-stdlib libpython3.9 libpython3.9-minimal
libpython3.9-stdlib libqt5webengine-data libqt5webengine5
libqt5webenginecore5 libswresample3 libswscale5 libwayland-client0
libwayland-server0 p11-kit p11-kit-modules python2.7 python2.7-minimal
python3-cffi-backend python3-gi python3-gi-cairo python3.9 python3.9-minimal
qml-module-qtwebengine yaru-theme-gnome-shell
0 upgraded, 0 newly installed, 0 to remove and 64 not upgraded.