There is no need to put the script on the bin directory.

- copy the text into a text file adding in the first line #!/bin/sh (or whatever your shell is)
- chmod +x filename.sh ( makes the text file executable
- then you can add the directory where the file is located to the user path, if you want.
- if you saved the file on /root then you can run it with:
/root/filename.sh <--- press enter

- voilá