Checking your build worked

Here are a couple more commands to make sure that the build worked, and to make sure the executable files it was supposed to generate are actually there. From the bitcoin/ directory, run the following command:

ls src/bitcoind
ls src/bitcoin-cli
ls src/qt/bitcoin-qt

Running this command will show you the Bitcoin Core Welcome screen, similar to the following screenshot:

Excellent! If Bitcoin runs without error, that means your build environment has everything you need to create an altcoin. Let's start making your altcoin.