$ sudo apt update
$ sudo apt upgrade
$ sudo apt upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: distro-info-data : Breaks: distro-info (< 0.20~) but 0.18ubuntu0.18.04.1 is to be installed dpkg : Breaks: libapt-pkg5.0 (< 1.7~b) but 1.6.13 is to be installed E: Broken packages
$ apt list --upgradable Listing... Done ubuntu-advantage-tools/bionic-updates 27.0.2~18.04.1 amd64 [upgradable from: 20.3] N: There are 2 additional versions. Please use the '-a' switch to see them.
$ sudo apt remove ubuntu-advantage-tools Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: ubuntu-advantage-tools ubuntu-minimal 0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded. After this operation, 275 kB disk space will be freed. Do you want to continue? [Y/n] y dpkg: warning: files list file for package 'ubuntu-advantage-tools' missing; assuming package has no files currently installed (Reading database ... 90724 files and directories currently installed.) Removing ubuntu-minimal (1.450.2) ... Removing ubuntu-advantage-tools (20.3) ...
$ sudo apt update Hit:1 http://jp.archive.ubuntu.com/ubuntu bionic InRelease Get:2 http://jp.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB] Hit:3 https://packages.microsoft.com/ubuntu/20.04/prod focal InRelease Get:4 http://jp.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB] Get:5 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB] Fetched 252 kB in 2s (123 kB/s) Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date.