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As far my assumption it is related to directory but after that i cannot understand the remaining pattern

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“dr— -w- --x file”
d: Denotes it's a directory
r - Read Permission
w - Write Permission
x - Execute Permission


First 3 character (apart from "d") denotes permission of owner of file.
Next 3 character tell about permission of user in same group
Last 3 character denotes access for others (not owner, not in same group)


You can refer link to read more about it. https://en.wikipedia.org/wiki/Chmod

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