regarding mount
 

i don't understand this, why do you have to mount a usb or cd to use them? its such a hassle, in windows the usb/cd just works, but in linux you have to mount it, why?

when ever i shutdown in linux, i am using ubuntu it says my drive didn't unmount on shutdown and it might damage my files?

In *NIX systems you have to manually add file systm into root filesystem hierarchy. Mount command used to attach file system found on other device like usb, cd, partition into root fileststem (/).

If you are using graphic then system automatically mount mdedia but if you are using command line then you have to manually mount media on their mount point.

When you shutdown system all mounted filesystems will be unmount.
Where you get this message?

Regards,

I guess windows also mounts devices but without the users don't notice it.