Ways to set permissions for Linux files and folders

1. Character notation

Type operation permissions

U +r

G -W

o =x

A

The type represents an object that changes permissions, and U represents the user of the file. G represents the group of all the files, O represents a non-user group of users. A means Ugo

Action + Represents the addition of permissions,-Indicates reduced permissions, = indicates permissions granted

Permission r means read only, W is writable, X is operational

[[Email protected] ~] # mkdir Perm

[[Email protected] ~] # CD Perm

[[email protected] perm] # mkdir Test

[[email protected] PERM] # CD Test

[[email protected] test] # touch Test1

[[email protected] test] # touch Test2

Here is the test order, see details

chmod u-w Test

chmod g+w Test

chmod ug+w Test

chmod ugo-x Test

chmod a+x Test

chmod o=w Test

chmod a= Perm

Chmod-r a+rwx Perm

2, digital notation

Permission numbers

R4

W2

X1

-0

For example, the rwx number means that 4+2+1=7, which is actually a binary representation, rwx three-bit bit,111, or 7

Examples:

chmod 577 Test

chmod 555 Test

Chmod-r 754 test//-r reference meaning recursive

Ways to set permissions for Linux files and folders