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Filesystem permissions

File permissions in Linux are coded symbolically (as letters)

r - read
w - write
x - execute

And Numerically:

4 - read
2 - write
1 - execute
dir permissions Octal del rename create files dir list read files contents write file contents cd dir cd subdir subdir list access subdir files
— 0                
-W- 2                
R– 4   only files names (*)            
RW- 6   only files names (*)            
–X 1     X X X X X X
-WX 3 X   X X X X X X
R-X 5   X X X X X X X
RWX 7 X X X X X X X X

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