Run Bitcoin and BitcoinCash in same server
The PORT (to receive data) for both of them is 8332 by default. So you must determine the PORT in the config file for one or both of them like this:

For BitcoinCash:

server=1
daemon=1
rpcuser=xxx
rpcpassword=zzz
rpcport=8355
port=6950


For Bitcoin:

server=1
daemon=1
rpcuser=aaaaaa
rpcpassword=bbbb
rpcport=8320
port=5380


Don't forget to allow the ports by firewall and specify different data directories for them.