Question about installing a script
 

How do you install a script if it's name is "install.sh"? Thanks.

Scripts of that name are usually executed, not installed. Executing them installs other things. To execute it, normally you type:
in a terminal. You may need to be root or use `sudo` depending on your distro.. If there are other (specific) instructions, they should be in a README or INSTALL text file that came with the software.

Note that your distro's package manager will probably not know about the package that you install using this install.sh method.

You create it as a file on the system, ensure that it is executable and run it. Prudent to view its contents too unless you trust the source.

you might need to give it execute permission using the "chmod" command if it does not have it already.