There seems to be no more problems. After the update, everything seems to be fine. When I run apt-get upgrade, there is no shown message.
$ install-info --version Debian install-info version 1.14.20ubuntu1. Copyright (C) 1994,1995 Ian Jackson. This is free software; see the GNU General Public Licence version 2 or later for copying conditions. There is NO warranty. Seems to have worked. Thanks! -- package libaa1-dev 1.4p5-37build1 failed to install/upgrade: subprocess pre-removal script returned error exit status 1 https://bugs.launchpad.net/bugs/396441 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs