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I'm a linux newbie.Today when I try to connect USB-convert-to-serial-port .I should install module or driver or both of them? Can any one explain what is module and what is driver in simple words and pictures are perfered

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pictures are perfered - We like pictures, too. They help us understand, what you mean. Please post screenshots or the text of the exact message that you get. –  user 99572 is fine Mar 7 '13 at 14:34
    
@user99572isfine I just what to know the difference between the kernel module and driver which are just terms I think. –  张 源 Mar 7 '13 at 14:48
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In the easiest way I can think:

a module is a "piece of software", of any kind. it is a part of the main kernel, not a "user program". a driver is a "piece of software" of one specific kind: it is needed to communicate with hardware components.

a "driver" IS a kind of module.

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Drivers are the firmware required by the OS to actively use the hardware on your system. Modules are like add-ons in Firefox (or chrome) where they give you more/different software functionality.

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