In linux, write a script that accepts a port number from the user. The script should then use that port number and use it in a command to enable it on the firewall. The script should then let the user know if the command succeeded by printing a message based on the commands output (hint: the CentOS firewall configuration command prints the word success if the change worked). If the change succeeds, the script should then reload the firewall to make the change take effect.