I had Ubuntu 14 and upgraded to 16, but there were some problems during the installation with apt update, upgrade, etc. The computer is working now, but I still have some minor issues, some times depending on what package I try to install.
The thing is, I am supposedly using Ubuntu 16.04 now (that's what "about this computer" says) but if I enter tty1, for example, I get this:
Ubuntu 16.04.6 LTS ......
(login)
Welcome to Ubuntu 18.04.3 LTS ....
Documentation
..
0 packages can be updated
...
...
New release '18.04.2 LTS' available.
Run do-release-upgrade to upgrade it
Which is very confusing. Regarding some problems I have, for example, I get this error when trying to execute an application:
error while loading shared libraries: libmysqlclient.so.18: cannot open shared object file: No such file or directory`
So I use apt-file search and find that I need libmysqlclient-dev, but this is what I get when I try to install the package:
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libmysqlclient-dev : Depends: zlib1g-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
Anything I could try to fix these problems?
