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This article mainly introduces the relevant knowledge of "what does linux modify authority 777 refer to". The editor shows you the operation process through an actual case. The operation method is simple and fast, and it is practical. I hope this article "what is the meaning of linux modification authority 777" can help you solve the problem.

In linux, the modification permission 777 indicates that the modification permission is read-write run; the first "7" indicates the owner of the current file to be readable and runnable; the second "7" represents the group readable runnable permission of the current file; and the third "7" represents the out-of-group readable runnable permission of the current file.

The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is linux modify permission 777?

On linux systems, permissions for files or directories can be divided into three types:

R: 4 is readable

WRV 2 is writable

X: 1 execution

-: the corresponding value 0

The numbers 4, 2, and 1 indicate read, write, and execute permissions

Rwx = 4 + 2 + 1 = 7 (read / write run)

Rw = 4 + 2 = 6 (readable and writable but not runnable)

Rx = 4 + 1 = 5 (readable, runnable, not writable)

So the highest permission is 777: (4, 2, 1) (4, 2, 1) (4, 2, 1)

The first 7: indicates the permissions of the owner of the current file, and the read, write and executable permissions of 7, 4, 2, 1

The second 7: indicates the group (user in the same group) permission of the current file, and the read-write and executable permission of 7-4-2-1.

The third 7: indicates the out-of-group permission of the current file, and the read-write and executable permission of 7-4-2-1.

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