Linux Modify file permission record

1, from the type of file can be divided into three kinds,

With the ls-l query, the "one" begins with the file, the letter "D" begins with the directory (commonly known as a folder), the letter "L" is the beginning of the connection.

2. The remaining 9 are three for a group each group has four symbols consisting of "R", "W", "X", "-" respectively.

R (Read): Delegate Read permission

W (write): Represents the Write permission

X (execuite): Delegate permission to execute

-: The delegate does not have this permission

3. The first group represents what permissions the owner of this file has on this file.

The second group represents what permissions the same group of people in this file have on this file.

The third group represents what permissions a person, other than a group, has on this file.

4. Modify Permissions

You can use command chmod to add permissions to a file

    General modification method:

chmod +x" file name ": Give everyone (that is, the owner, the same group, people outside the group) plus the rights   chmod u+x" filename ": Give Yourself the privilege U: On behalf of the user is their own chmod g+x" file name ": Give Yourself the privilege G: Grup is the same group of people chmod o+x" filename ": Add permission to yourself O: On behalf of other people

Professional Modification method

Chome 755 file name

Reason: The Modify permission is divided into three 8 binary to represent the

For example:-rwx r-x---This format, can be divided into 0 or one representation, if shown above-the above is indicated by the "1" indicates that there is a corresponding read and write permission.

Binary	Octal
111 (RWX)	7
(rw-)	6
101 (R-x)	5
(r--)	4
011 (-WX)	3
010 (-w-)	2
001 (--x)	1
(----)	0

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Linux Modify file permission records