PhoenixMiner.exe -pool eth.protonmine.com:8008 -wal 0x0 -pass x -worker rig1
Don't use PhoenixMiner.exe on linux, just use the standard ./PhoenixMiner and then the config above. Extra infomation is on the pools getting started page.
Finally you're up and running. You can check your stats on ETH by searching your address in the input field