I have the same problem after updating to 21.04. The error is: usrmerge (24ubuntu3)...
FATAL ERROR: Both /bin/ksh and /usr/bin/ksh exist. Sub-process /usr/bin/dpkg returned an error code (1) $ sudo /usr/lib/usrmerge/convert-usrmerge FATAL ERROR: Both /bin/ksh and /usr/bin/ksh exist. You can try correcting the errors reported and running again /usr/lib/usrmerge/convert-usrmerge until it will complete without errors. Do not install or update other Debian packages until the program has been run successfully. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924850 Title: package usrmerge 24ubuntu3 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usrmerge/+bug/1924850/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs