Correct, same commands used on test nets to work on the main net.
Typically the port
:8888 is used.
--wallet-url http://wallet:5555 switch is used to grab your keys, therefore this depends entirely where you keep them. You could continue to keep your keys at that address, I'm guessing it's a local one and you're using a guide like
EOSDocs.io? This is something specific to you and your environment.
-u http://server:77777 references the Block Producers endpoint which is a gateway into the network, this will change for main net. What you put in here depends entirely on the Block Producers online when it launches, at the moment this endpoint connects to the Jungle testnet
-u http://dolphin.eosblocksmith.io:8888 etc.
Main stream Block Producers will all advertise what to put in the
-u switch when the main net comes online.