8. Permissions

8.1. Understanding Permissions

Understanding Permissions

Permission

Octal

Binary

Description

---

0

000

Cannot read, execute or modify

--x

1

001

Can execute

-w-

2

010

Can write (modify)

-wx

3

011

Can modify and execute

r--

4

100

Can read

r-x

5

101

Can read and execute

rw-

6

110

Can read and write

rwx

7

111

Can read, write and execute

8.2. Changing Permissions

8.2.1. chmod

8.2.2. chown

8.2.3. chgrp

8.3. UMASK

8.4. Sticky bit

8.5. ACL