Hello and thanks for your bug report. This log excerpt suggest that you installed or are trying to install an unofficial or modified mysql package:
DuplicateSignature: package:mysql-server-8.0:8.0.25-0ubuntu0.20.04.1 Setting up mysql-server-8.0 (8.0.25-0ubuntu0.20.04.1) ... /var/lib/dpkg/info/mysql-server-8.0.postinst: line 191: /usr/share/mysql-common/configure-symlinks: No such file or directory dpkg: error processing package mysql-server-8.0 (--configure): installed mysql-server-8.0 package post-installation script subprocess returned error exit status 127 This is a case we can't support, given that we don't have control on such packages. My suggestion here is to cleanup all the 3rd party or modified packages (`apt remove --purge` or `dpkg -P`) and try again. I'm marking this bug report as Incomplete for the moment. If you agree with my analysis please change its status to Invalid (= not a bug in Ubuntu), otherwise please explain why you believe this is a bug in Ubuntu rather a problem specific to your system, possibly providing steps to reproduce, change the report status back to New and we'll look at it again. Thanks! ** Changed in: mysql-8.0 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1933304 Title: package mysql-server-8.0 8.0.25-0ubuntu0.20.04.1 failed to install/upgrade: installed mysql-server-8.0 package post-installation script subprocess returned error exit status 127 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-8.0/+bug/1933304/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs