or download this
$ ln -s /usr/lib/libz.so.1.2.1.2 /usr/lib/libz.so
$ ls -l /usr/lib/libz*
lrwxrwxrwx 1 root root 24 Jul 22 12:10 /usr/lib/libz.so -> /usr/li
+b/libz.so.1.2.1.2
lrwxrwxrwx 1 root root 15 Feb 14 20:24 /usr/lib/libz.so.1 -> libz.
+so.1.2.1.2
-rwxr-xr-x 1 root root 63624 Jul 21 2005 /usr/lib/libz.so.1.2.1.2