I removed the current mysql like that :
apt-get remove --purge mysql-server mysql-client mysql-common
apt-get remove --purge mysql-client-core-5.5
apt-get autoremove
apt-get autoclean
rm -rf /var/lib/mysql
And than when I want to reinstall I got some problems:
apt-get install mysql-server
//the output is
The following packages have unmet dependencies:
mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.**
and again
apt-get install mysql-server-5.5
//the output is
The following information may help to resolve the situation:
The following packages have unmet dependencies:
mysql-server-5.5 : PreDepends: mysql-common (>= 5.5.47-0+deb7u1) but it is not going to be installed
Depends: mysql-client-5.5 (>= 5.5.47-0+deb7u1) but it is not going to be installed
Recommends: mailx
E: Unable to correct problems, you have held broken packages.
I have already installed many times mysql-common and mysql-clint-5.5
What might be problem?
I solved this after 6 hours :) Main problem was version number.After unistalling you should write like this:
To install mysql-server :
firstly install mysql-server-5.5
And to install mysql-server-5.5:
install mysql-common apt-get install mysql-common=5.5.47-0+deb7u1
install mysql-client-5.5 apt-get install mysql-client=5.5.47-0+deb7u1
After install them :
install mysql-server-5.5 apt-get install mysql-server-5.5
And finally :
install mysql-server mysql-client apt-get install mysql-server mysql-client