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What is /dev/mapper used for?

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Old Unix and Linux 08-25-2013
rupeshkp728 rupeshkp728 is offline
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What is /dev/mapper used for?

I see a folder named "mapper" in /dev.
This folder "mapper" has some soft link to other folders.

What is mapper folder used for?
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Old Unix and Linux 08-25-2013
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Google is your friend here, and there is a lot about it...

A starter:-

Device mapper - Wikipedia, the free encyclopedia
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Thanks wisecracker for the reply.

In the link Linux lvm - Logical Volume Manager in section "Mount logical volumes" when the logical volume is mounted why does df -h output shows the volume mounted in dev/mapper?

In link Logical volume management also shows the same in section "Listing 8. Mounting the LV".
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