To avoid to have many packages to be removed you need to downgrade all the 9.3 packages.
~~~~~~~~~ First find them. dpkg -l | grep 2.31-0ubuntu9.3 ii libc-bin 2.31-0ubuntu9.3 amd64 GNU C Library: Binaries ii libc-dev-bin 2.31-0ubuntu9.3 amd64 GNU C Library: Development binaries ii libc6:amd64 2.31-0ubuntu9.3 amd64 GNU C Library: Shared libraries ii libc6-dbg:amd64 2.31-0ubuntu9.3 amd64 GNU C Library: detached debugging symbols ii libc6-dev:amd64 2.31-0ubuntu9.3 amd64 GNU C Library: Development Libraries and Header Files ii libc6-i386 2.31-0ubuntu9.3 amd64 GNU C Library: 32-bit shared libraries for AMD64 ii locales 2.31-0ubuntu9.3 all GNU C Library: National Language (locale) data [support] ~~~~~~~~~ Then downgrade them all. sudo apt install libc-bin=2.31-0ubuntu9.2 libc-dev-bin=2.31-0ubuntu9.2 libc6:amd64=2.31-0ubuntu9.2 libc6-dbg:amd64=2.31-0ubuntu9.2 libc6-dev:amd64=2.31-0ubuntu9.2 libc6-i386=2.31-0ubuntu9.2 locales=2.31-0ubuntu9.2 Lecture des listes de paquets... Fait Construction de l'arbre des dépendances Lecture des informations d'état... Fait Paquets suggérés : glibc-doc Les paquets suivants seront mis à une VERSION INFÉRIEURE : libc-bin libc-dev-bin libc6 libc6-dbg libc6-dev libc6-i386 locales 0 mis à jour, 0 nouvellement installés, 7 remis à une version inférieure, 0 à enlever et 0 non mis à jour. Inst libc6-dbg [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) [] Inst libc6-i386 [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) [] Inst libc6-dev [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) [] Inst libc-dev-bin [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) [] Inst libc6 [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf libc6 (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Inst locales [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [all]) Inst libc-bin [2.31-0ubuntu9.3] (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf libc-bin (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf libc6-dbg (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf libc6-i386 (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf libc6-dev (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf libc-dev-bin (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [amd64]) Conf locales (2.31-0ubuntu9.2 Ubuntu:20.04/focal-updates [all]) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926918 Title: cannot install libc6-dev, requires old libc6 version To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1926918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
