znd@znd-desktop:~/lightning/lightning$ ./lightningd --alias=znd --rgb=42f459 --network=bitcoin --bitcoin-datadir ~/.bitcoin --log-level=debug
bash: ./lightningd: Is a directory
Can you list the output of
ls -al ?
But if
lightningd is a directory, then open it and run the command inside the directory where your executable (called
lightningd) is located.