Centos – how can i install apt-get on Centos

In this case, here's what I would try:

Try to reinstall mysql-server-5.1:

sudo apt-get install --reinstall mysql-server-5.1

Try to reinstall mysql-server:

sudo apt-get install --reinstall mysql-server

Try to reconfigure mysql-server-5.1 and try reinstall again:

sudo dpkg-reconfigure mysql-server-5.1
sudo apt-get install --reinstall mysql-server

The issue was with zlib upgrade from source which is a problem affect all RHEL/CentOS/CL installations:

http://bugs.centos.org/view.php?id=4702&nbn=1

I have removed source zlib

/usr/local/lib/libz.so.1.2.5

and Changed the links

/usr/local/lib/libz.so -> libz.so.1.2.5 lrwxrwxrwx 1 root root
13 Sep 24 2010 /usr/local/lib/libz.so.1 -> libz.so.1.2.5

to point to libz.so.1.2.3. This has fixed the issue.