当我运行apt-get update&时apt-get upgrade，系统建议我删除以下软件包。运行sudo aptitude keep-all、aptitude autoclean或apt-get autoremove按照建议这里不起作用。我不记得我做了什么改动，让 Ubuntu 建议删除所有这些包。
The following packages were automatically installed and are no longer required:
apache2-bin apache2-data apache2-utils apg apport-symptoms apturl-common
avahi-utils cups-pk-helper cups-server-common gir1.2-goa-1.0
gir1.2-notify-0.7 gir1.2-snapd-1 gnome-control-center-faces hplip-data
ippusbxd libapr1 libaprutil1 libaprutil1-dbd-sqlite3 libaprutil1-ldap
libauthen-sasl-perl libcolord-gtk1 libfile-listing-perl libfont-afm-perl
libglu1-mesa libgsound0 libgssdp-1.2-0 libgupnp-1.2-0 libgupnp-av-1.0-2
libgupnp-dlna-2.0-3 libhpmud0 libhtml-form-perl libhtml-format-perl
libhtml-tree-perl libhttp-cookies-perl libhttp-daemon-perl
libhttp-negotiate-perl libimagequant0 libio-socket-ssl-perl liblua5.2-0
libmailtools-perl libnet-http-perl libnet-smtp-ssl-perl libnet-ssleay-perl
librygel-core-2.6-2 librygel-db-2.6-2 librygel-renderer-2.6-2
librygel-server-2.6-2 libsane-hpaio libtie-ixhash-perl libtry-tiny-perl
libwhoopsie-preferences0 libwww-robotrules-perl libxatracker2
libxml-xpathengine-perl libxss1 libxvmc1 mobile-broadband-provider-info
network-manager-gnome perl-openssl-defaults printer-driver-postscript-hp
python3-cups python3-dateutil python3-debconf python3-distro-info
python3-distupgrade python3-entrypoints python3-keyring python3-lazr.uri
python3-olefile python3-pil python3-problem-report python3-protobuf
python3-pymacaroons python3-renderpm python3-reportlab
python3-reportlab-accel python3-rfc3339 python3-secretstorage
python3-simplejson python3-software-properties python3-systemd python3-tz
python3-update-manager python3-wadllib rygel unattended-upgrades
whoopsie-preferences x11-apps x11-session-utils xbitmaps xfonts-scalable
xinit xinput xserver-xorg-core xserver-xorg-input-all
xserver-xorg-input-libinput xserver-xorg-input-wacom xserver-xorg-video-all
xserver-xorg-video-amdgpu xserver-xorg-video-ati xserver-xorg-video-fbdev
xserver-xorg-video-intel xserver-xorg-video-nouveau xserver-xorg-video-qxl
xserver-xorg-video-radeon xserver-xorg-video-vesa xserver-xorg-video-vmware
Use 'sudo apt autoremove' to remove them.