With linux you have to change the permissions to execute and to make it easy the three 7’s means everyone can read,write and execute the file. No I’m not going to help you limit it down to only one person can execute the file. But since you are the only one with the password to root through SSH, you will be the only one that knows that the program is there.
careful with your rm there as you could inadvertantly erase everything from your root and you will have to follow another post on restoring your Cloud…