[XFree86] error while loading shared libraries: libz.so.1:cannot open shared object file:

I am getting some errors while running the Xinstall.sh install script. Any hints? thanks * Running ldconfig Updating the fonts.dir file in /usr/X11R6/lib/X11/fonts/local.../usr/X11R6/bin/mkfontscale: error while loading shared libraries: libz.so.1: cannot open shared

[XFree86] error while loading shared libraries: libz.so.1:cannot open shared object file:

I am getting some errors while running the Xinstall.sh install script. Any hints? thanks Errors: * Running ldconfig Updating the fonts.dir file in /usr/X11R6/lib/X11/fonts/local.../usr/X11R6/bin/mkfontscale: error while loading shared libraries: libz.so.1: cannot open