you're right, it is a dup of bug 901180. I cannot reproduce the crash but 'sudo apt-get remove vsftpd' return like the bug:
Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: vsftpd 0 upgraded, 0 newly installed, 1 to remove and 1 not upgraded. After this operation, 463 kB disk space will be freed. Do you want to continue [Y/n]? (Reading database ... 212726 files and directories currently installed.) Removing vsftpd ... vsftpd stop/waiting dpkg: error processing vsftpd (--remove): subprocess installed post-removal script returned error exit status 1 Processing triggers for man-db ... Processing triggers for ureadahead ... ureadahead will be reprofiled on next reboot Errors were encountered while processing: vsftpd E: Sub-process /usr/bin/dpkg returned an error code (1) $ sh -x /var/lib/dpkg/info/vsftpd.postrm remove + set -e + _USERNAME=ftp + _GROUPNAME=ftp + _DIRECTORY=/srv/ftp + [ -x /usr/sbin/deluser ] + deluser --quiet --system ftp /usr/sbin/deluser: Only root may remove a user or group from the system. $ sudo sh -x /var/lib/dpkg/info/vsftpd.postrm remove + set -e + _USERNAME=ftp + _GROUPNAME=ftp + _DIRECTORY=/srv/ftp + [ -x /usr/sbin/deluser ] + deluser --quiet --system ftp ** Changed in: vsftpd (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/903743 Title: package vsftpd 2.3.2-3ubuntu4.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/vsftpd/+bug/903743/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs