Kubo (go-ipfs) the earliest and most widely used implementation of IPFS.
$ echo "hello world" > hello $ ipfs add hello QmT78zSuBmuS4z925WZfrqQ1qHaJ56DQaTfyMUF7F8ff5o $ ipfs cat QmT78zSuBmuS4z925WZfrqQ1qHaJ56DQaTfyMUF7F8ff5o
