[Switch] linux permission operation

 

linux permissions

 

Reprinted from: http://hi.baidu.com/im886/blog/item/434764d9f6c210f838012f0b.html

 

 

1 [001] Execute permission x
2 [010] Write-only permission w
4 [100] Read-only permission r

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

sudo chmod 644 ××× (owner has read and write permissions, group users only have read permissions)

sudo chmod 700 ××× (only the owner has read and write and execute permissions)

sudo chmod 666 ××× (everyone has read and write permissions)

sudo chmod 777 ××× (everyone has read and write and execute permissions)

 

Where ××× refers to the file name (it can also be the folder name, but add -ld after chmod).

Explain, in fact, the entire command is in the form of
sudo chmod - (representative type) ××× ( owner ) ××× ( group user ) ××× ( other users )

Each of the three digits represents a user type Permission settings. The value is 0~7, that is, [000]~[111] in binary.

Each bit of this three-digit binary number represents read, write, and execute permissions, respectively.
r:4
w:2
x:1

such as 000 means none of the three permissions, and 100 means read-only. In this way, we have the following correspondence:
0 [000] No permission
1 [001] Execute permission x
2 [010] Write only permission w
4 [100] Read only permission r


6 [110] Read and write permission 7 [111 ] Read and write execute permission /var/www d rwx r-x r-x 3 root root 4096 2010-11-30 12:52 www /var/www/index.php.html -rw-r--r-- 1 root root 210 2010 -11-30 12:52 index.html 
 


 



-rw-r--r-- 1 root root 20 2010-11-30 12:51 index.php

wrong permissions
drwx------ 13 gg 4096 2010-11-29 17:32 avcha

correct permissions

directory 755 rwx r-x r-x file 644 rw- r-- r --  config writable 666 rw- rw- rw- directory: find path -type d -exec chmod 755 {} \; file: find path -type f -exec chmod 644{}\;   

where path is the path of the directory you need to modify


Error  can only be single

chmod 755 avcha
chmod 644 file.ext

http://blog.csdn.net/bmbm546/article/details/6875972

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