On Mon, Jun 15, 2020, 4:40 PM Gary Aitken <deb...@dreamchaser.org> wrote:
> Hi all, > > I'm attempting to manage a google-compute system running debian/ubuntu; > I normally run a freebsd system so I'm out of my element here and web > searches haven't helped: > > 81~16.04.1-Ubuntu SMP Mon May 11 14:56:45 UTC 2020 x86_64 x86_64 x86_64 > GNU/Linux > > When originally built, the system had a screwed-up postfix installation; > in attempting to solve this problem, I wanted to uninstall postfix and > reinstall it. However, I don't think I should do that because the postfix > installation has an issue: > > $ aptitude why postfix > i automysqlbackup Depends bsd-mailx | mailx > i A bsd-mailx Depends default-mta | mail-transport-agent > i A postfix Provides mail-transport-agent > > $ dpkg --simulate --remove postfix > dpkg: could not open log '/var/log/dpkg.log': Permission denied > dpkg: dependency problems prevent removal of postfix: > bsd-mailx depends on default-mta | mail-transport-agent; however: > Package default-mta is not installed. > Package postfix which provides default-mta is to be removed. > Package mail-transport-agent is not installed. > Package postfix which provides mail-transport-agent is to be removed. > bsd-mailx depends on default-mta | mail-transport-agent; however: > Package default-mta is not installed. > Package postfix which provides default-mta is to be removed. > Package mail-transport-agent is not installed. > Package postfix which provides mail-transport-agent is to be removed. > > dpkg: error processing package postfix (--remove): > dependency problems - not removing > Processing triggers for libc-bin (2.23-0ubuntu10) ... > dpkg: cycle found while processing triggers: > chain of packages whose triggers are or may be responsible: > libc-bin -> libc-bin > packages' pending triggers which are or may be unresolvable: > libc-bin: ldconfig > dpkg: error processing package libc-bin (--remove): > triggers looping, abandoned > Errors were encountered while processing: > postfix > libc-bin > > If I consider removing libc-bin so I can re-install it and correct the > dependency loop, I am unable to do so: > > $ dpkg --simulate --remove libc-bin > dpkg: could not open log '/var/log/dpkg.log': Permission denied > dpkg: error processing package libc-bin (--remove): > this is an essential package; it should not be removed > Processing triggers for libc-bin (2.23-0ubuntu10) ... > dpkg: cycle found while processing triggers: > chain of packages whose triggers are or may be responsible: > libc-bin -> libc-bin > packages' pending triggers which are or may be unresolvable: > libc-bin: ldconfig > dpkg: error processing package libc-bin (--remove): > triggers looping, abandoned > Errors were encountered while processing: > libc-bin > libc-bin > > I then considered forcing removal of postfix by ignoring dependencies, but > that has the same libc-bin loop issue: > > $ dpkg --simulate --ignore-depends bsd-mailx --purge postfix > dpkg: could not open log '/var/log/dpkg.log': Permission denied > (Reading database ... 171222 files and directories currently installed.) > Would remove or purge postfix (3.1.0-3ubuntu0.3) ... > Processing triggers for libc-bin (2.23-0ubuntu10) ... > dpkg: cycle found while processing triggers: > chain of packages whose triggers are or may be responsible: > libc-bin -> libc-bin > packages' pending triggers which are or may be unresolvable: > libc-bin: ldconfig > dpkg: error processing package libc-bin (--purge): > triggers looping, abandoned > Errors were encountered while processing: > libc-bin > > Can anyone give me some clues on how to resolve this? > The main goal is to uninstall postfix and re-install it, without > uninstalling > the automysqlbackup as this is a production system and the autobackup is > working properly. I believe the postfix dependency is for cases where the > auto-backup fails; it's also preventing mail from being delivered for > failing > cron jobs. > Sorry for the naivete of this; I'm new to linux. > Lots of the apt and dpkg functions require Root or Sudo. Notice the "Permission denied" phases mixed in with the responses. Thanks, > > Gary > Good luck, Kenneth Parker >
