Linux Rights Management Detailed

There are many kinds of permissions in Linux, which can be divided into three categories: User's permission to file, user's permission to system command and file special permission. Described in detail below.

Explain the meaning and function of setting permissions

First, the user's permissions to the file

The user's permission to the file refers to the user-owned file additions and deletions to change the operation. It can also be subdivided into basic permissions (UGO), umask permissions, and ACL permissions.

1. Basic Permissions

1), Permission bit

The permissions for the Linux files are altogether 10 bits. The first digit identifies the file type, followed by each three-digit owner, the owning group, and other people's permissions.

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2), permission meaning

3), related commands

2. Umask Permissions

3. ACL permissions

1), the meaning and function of ACL permission

2), ACL permission settings related commands

Second, the user's permission to the system command

Sudo

Iii. Special permissions for Files (chattr)

File type

Hard links and soft links

Iv.. SELinux Permissions

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Detailed Linux Rights Management