Thank you @Aeonix. Could you help me a little more?
When i delete line 24, the value for OS will be echo as Linux.
And if i put it back, the value will be echo as ubuntu.
I want the script to echo bout of them, LInux, Ubuntu.
How can i edit it?
Users may use different linux: arch, ubuntu, fedora and..... I want the script to echo that information.