Run bitcoinCash on same server with bitcoin
You can create a new username for Bitcoin cash or change default directory.

adduser BitcoinCashUser 

su BitcoinCashUser

BitcoinCashd -daemon


Now make sure it has own directory 

cd ~/.bitcoin


You should find the files in here.

Change Bitcoin Directory

Follow these instructions on here 

Note: kill bitcoin-cash before start it again. 

ps ax | grep bitcoinCashd
kill -9 &lt;Process ID&gt;