Sourcemod Could not load DB Drive & libz.so.1: cannot open shared object file

I have found myself with this problem and since I have fixed this multiple times and still cannot remember how I fix it each time I will document it here.

So my client preferences extension would not load.

I run rcon sm exts list

I see the failed:

Code:

[10] <FAILED> file "clientprefs.ext.so": Could not load DB Driver ""

entprefs.ext.so": Could not load DB Driver ""
[11] <FAILED> file "dbi.mysql.ext.so": libz.so.1: cannot open shared object file: No such file or directory

I fixed on CentOS 6 64bit by simply installing this.

Code:

yum install zlib.i686

fixing the dbi.mysql extension allows client preferences to find the DB Driver and each successfully loaded.