How should i diasble usb in linux ....

Solution
The easiest way would be to disable it in the BIOS settings. Other than that, compile a kernel without USB support as either a built-in or a module. With most Liniux distributions it may be possible to do this just by removing the relevant modules from /lib/modules.

Of course, anything that you do can easily be countermanded by someone with root access. Make sure that users don't have root access and that any sudo privileges are closely controlled.
The easiest way would be to disable it in the BIOS settings. Other than that, compile a kernel without USB support as either a built-in or a module. With most Liniux distributions it may be possible to do this just by removing the relevant modules from /lib/modules.

Of course, anything that you do can easily be countermanded by someone with root access. Make sure that users don't have root access and that any sudo privileges are closely controlled.
 
Solution