Nested Sequence of Directories!
When I searched for a file where one could (semi)control brightness I accidentally found a nested sequence of directories like below
aneesh@nb-14:~$ cd /sys/class/graphics/fb0/device
aneesh@nb-14:/sys/class/graphics/fb0/device$ cd graphics/fb0/device
aneesh@nb-14:/sys/class/graphics/fb0/device/graphics/fb0/device$ l
driver@ graphics/ modalias power/ subsystem@ uevent
aneesh@nb-14:/sys/class/graphics/fb0/device/graphics/fb0/device$
What is the motive behind having such nested sequences of directories?
How was this possible? I figured out one possible answer to that. E.g.: for creating a sequence /a/b/a/b/a/b..., one can create a link to the directory /a and paste it in the folder /a/b. Is this the only way nested sequences can be formed?
Symbolically it's not obvious: To verify this I tried giving command l (see above) and found symbols against each file/directory. I learnt from this forum itself that in the result of l, the symbol @ is for indicating drivers and / for directories. But no symbolic indication to show that a certain folder is actually a link to another one! Also, there's no manual entry about l to find which symbol (if any) indicates file link.
When I searched for a file where one could (semi)control brightness I accidentally found a nested sequence of directories like below
aneesh@nb-14:~$ cd /sys/class/graphics/fb0/device
aneesh@nb-14:/sys/class/graphics/fb0/device$ cd graphics/fb0/device
aneesh@nb-14:/sys/class/graphics/fb0/device/graphics/fb0/device$ l
driver@ graphics/ modalias power/ subsystem@ uevent
aneesh@nb-14:/sys/class/graphics/fb0/device/graphics/fb0/device$
What is the motive behind having such nested sequences of directories?
How was this possible? I figured out one possible answer to that. E.g.: for creating a sequence /a/b/a/b/a/b..., one can create a link to the directory /a and paste it in the folder /a/b. Is this the only way nested sequences can be formed?
Symbolically it's not obvious: To verify this I tried giving command l (see above) and found symbols against each file/directory. I learnt from this forum itself that in the result of l, the symbol @ is for indicating drivers and / for directories. But no symbolic indication to show that a certain folder is actually a link to another one! Also, there's no manual entry about l to find which symbol (if any) indicates file link.
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