/etc/security/ulimit.set

ulimit -d unlimited
ulimit -f unlimited
ulimit -l unlimited
ulimit -m unlimited
ulimit -n 65535
ulimit -u 49152
ulimit -v unlimited

/etc/init.d/apache2, /etc/init.d/nginx, /etc/init.d/mysql

#!/bin/bash

. /etc/security/ulimit.set