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This article mainly introduces "the meaning and authority of chmod command in Linux system". In daily operation, I believe that many people have doubts about the meaning and authority of chmod command in Linux system. The editor has consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "meaning and authority of chmod command in Linux system". Next, please follow the editor to study!

For a permission assignment command: sudo chmod-R 764 × ×; we must understand its meaning:

(1) meaning of each field: sudo chmod-R (change folder and its subfolders)

7 (owner rights) 6 (group user rights) 4 (other user rights) xxx (target file)

(2) first of all, understand the following permission correspondence (execute permission letter means permission meaning execute permission value representation):

R read right 4

W write right 2

X execution right 1

Rwx (read, write, execute)

Rw- (read, write)

.

(3) the origin of 7, 6 and 4

To rwx:4+2+1=7;, to rw-:4+2=6;, to r-x:4+1=5.

(4) Common permission commands:

The code is as follows:

Sudo chmod 777-R xxx (change folder and subfolder permissions to 777)

Sudo chmod 600 × × (only the owner has read and write permissions)

Sudo chmod 644 × × (owners have read and write permissions, group users only have read permissions)

Sudo chmod 700 × × (only the owner has permission to read, write and execute)

Sudo chmod 666 × × (everyone has read and write access)

Sudo chmod 777 × × (everyone has access to read, write and execute)

At this point, the study on "the meaning and authority of chmod commands in Linux system" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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