How do I run a .sh or .command file in Terminal
Open Terminal, type in sh /path/to/file and press enter.
Faster is to type sh and a space and then drag the file to the window and release the icon anywhere on the window.
Alternatively, you could also do
cd /directory/with/executable
chmod +x executable # only required if your file is not already executable
./executable
which will also run the executable file with its specified shell (if specified in the shebang #!/bin/(shell)