1

I'm trying to install mysql but can't because of the following error:

set@set-home ~ $ sudo apt-get install mysql-server -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 libstdc++6:i386 : Breaks: libstdc++6 (!= 8.1.0-5ubuntu1~14.04) but 8.2.0-9 is to be installed
 libstdc++6 : Depends: gcc-8-base (= 8.2.0-9) but 8.1.0-5ubuntu1~14.04 is to be installed
              Breaks: libboost-date-time1.54.0 but 1.54.0-4ubuntu3.1 is to be installed
              Breaks: libstdc++6:i386 (!= 8.2.0-9) but 8.1.0-5ubuntu1~14.04 is to be installed
 mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

I have tried:

  1. sudo apt-get -f install
  2. sudo apt-get -u dist-upgrade
  3. sudo apt-get autoclean
  4. sudo apt-get clean

but all this with no luck. How can I solve this?

1 Answer 1

2

Let's look at the available packages in the Ubuntu repositories for libstdc++6:

$ rmadison libstdc++6             // The rmadison command is provided by the 'devscripts' package
 libstdc++6 | 4.6.3-1ubuntu5          | precise         | amd64, armel, armhf, i386, powerpc
 libstdc++6 | 4.8.2-19ubuntu1         | trusty          | amd64, arm64, armhf, i386, powerpc, ppc64el
 libstdc++6 | 4.8.4-2ubuntu1~14.04.4  | trusty-security | amd64, arm64, armhf, i386, powerpc, ppc64el
 libstdc++6 | 4.8.4-2ubuntu1~14.04.4  | trusty-updates  | amd64, arm64, armhf, i386, powerpc, ppc64el
 libstdc++6 | 5.3.1-14ubuntu2         | xenial          | amd64, arm64, armhf, i386, powerpc, ppc64el, s390x
 libstdc++6 | 5.4.0-6ubuntu1~16.04.10 | xenial-security | amd64, arm64, armhf, i386, powerpc, ppc64el, s390x
 libstdc++6 | 5.4.0-6ubuntu1~16.04.11 | xenial-proposed | amd64, arm64, armhf, i386, powerpc, ppc64el, s390x
 libstdc++6 | 5.4.0-6ubuntu1~16.04.11 | xenial-updates  | amd64, arm64, armhf, i386, powerpc, ppc64el, s390x
 libstdc++6 | 8-20180414-1ubuntu2     | bionic          | amd64, arm64, armhf, i386, ppc64el, s390x
 libstdc++6 | 8.2.0-1ubuntu2~18.04    | bionic-updates  | amd64, arm64, armhf, i386, ppc64el, s390x
 libstdc++6 | 8.2.0-7ubuntu1          | cosmic          | amd64, arm64, armhf, i386, ppc64el, s390x
 libstdc++6 | 8.2.0-12ubuntu1         | disco           | amd64, arm64, armhf, i386, ppc64el, s390x
 libstdc++6 | 8.2.0-13ubuntu1         | disco-proposed  | amd64, arm64, armhf, i386, ppc64el, s390x

Aha. Neither of your two options, 8.1.0-5ubuntu1~14.04 nor 8.2.0-9 is from the Ubuntu repositories.

Now we know the problem: You have unwisely added non-Ubuntu sources that are providing packages that are incompatible with your release of Ubuntu. This is also called a 'version conflict' or 'held broken packages'. They are not really "broken", just wrong version...but they do break your system.

The solution is to uninstall ALL packages from that unwise source, and then to delete that source. Return your system to using packages provided by the Ubuntu repositories. Then MySQL will install.

If you don't know how to uninstall packages from a specific source, then see How can PPAs be removed? for instructions on how to install and use the ppa-purge command.

6
  • ppa-purge also can't be installed because "unmet dependencies"
    – SET
    Dec 27, 2018 at 21:07
  • how can I find out which source is wrong?
    – SET
    Dec 27, 2018 at 21:15
  • If you don't already know which sources you added to provide which packages, then either look up how to use the apt-cache policy command...or simply start removing ALL non-Ubuntu sources. Read all output carefully - it's there to keep you from making another horrible mistake.
    – user535733
    Dec 27, 2018 at 21:53
  • I have fixed this by typing gksu software-properties-gtk then going to maintanance section and pressing first purge residual configuration, then fix merge list problems
    – SET
    Dec 27, 2018 at 22:00
  • "You have unwisely added non-Ubuntu sources that are providing packages that are incompatible with your release of Ubuntu." Careful now. Another possibility is simply that OP has out-of-date package indexes...
    – fkraiem
    Sep 1, 2019 at 2:12

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .