I already updated WSL itself (as Administrator)
> wsl --set-version ubuntu-20.04 2
> wsl --update
Which worked but still did not solve my problem inside the WSL Ubuntu 20.04.
$ sudo apt update
Reading package lists... Error!
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_main_binary-amd64_Packages.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_main_binary-amd64_Packages -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_main_binary-amd64_Packages).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_main_i18n_Translation-en.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_main_i18n_Translation-en -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_main_i18n_Translation-en).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_main_cnf_Commands-amd64.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_main_cnf_Commands-amd64 -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_main_cnf_Commands-amd64).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_restricted_binary-amd64_Packages.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_restricted_binary-amd64_Packages -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_restricted_binary-amd64_Packages).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_restricted_i18n_Translation-en.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_restricted_i18n_Translation-en -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_restricted_i18n_Translation-en).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_restricted_cnf_Commands-amd64.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_restricted_cnf_Commands-amd64 -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_restricted_cnf_Commands-amd64).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_universe_binary-amd64_Packages.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_universe_binary-amd64_Packages -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_universe_binary-amd64_Packages).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_universe_i18n_Translation-en.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_universe_i18n_Translation-en -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_universe_i18n_Translation-en).
E: Failed to fetch store:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_universe_cnf_Commands-amd64.xz rename failed, No such file or directory (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_focal_universe_cnf_Commands-amd64 -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal_universe_cnf_Commands-amd64).
...
E: Some index files failed to download. They have been ignored, or old ones used instead.
E: Problem renaming the file /var/cache/apt/srcpkgcache.bin.OL2UsH to /var/cache/apt/srcpkgcache.bin - rename (22: Invalid argument)
E: Problem renaming the file /var/cache/apt/pkgcache.bin.EdYnXG to /var/cache/apt/pkgcache.bin - rename (22: Invalid argument)
W: You may want to run apt-get update to correct these problems
E: The package cache file is corrupted
sudo rm -rf /var/lib/apt/lists/* and sudo apt clean did not help, too. Here are my sources, all from /etc/apt/sources.list.
deb http://archive.ubuntu.com/ubuntu/ focal main restricted
deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted
deb http://archive.ubuntu.com/ubuntu/ focal universe
deb http://archive.ubuntu.com/ubuntu/ focal-updates universe
deb http://archive.ubuntu.com/ubuntu/ focal multiverse
deb http://archive.ubuntu.com/ubuntu/ focal-updates multiverse
deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
# deb http://archive.canonical.com/ubuntu focal partner
deb http://security.ubuntu.com/ubuntu/ focal-security main restricted
deb http://security.ubuntu.com/ubuntu/ focal-security universe
deb http://security.ubuntu.com/ubuntu/ focal-security multiverse
I don't know if this is WSL related or Ubuntu related, but I guess the first as I never had such problems on native Ubuntu.
I use WSL mostly as SSH and Git client.
Anybody knows whats wrong here?
