18 | octal(777) chmod

Linux Command Line Tutorial

Everything is similar to the previous two videos in the series. The only difference is in this video we will learn how to use chmod with octal numbers.

In Octal

r = 4
w = 2
e = 1

This tutorial covers how to use the chmod command to change the access permission of files and directories.

In Linux, the file is associated with an owner and a group and assigned with permission access rights for three different classes of users:

The file owner
The group members
Others(everybody else)

File permissions can be changed. In order to do that we make use of chmod command.

There are three file permissions that apply to each class:

The read permission
The write permission
The execute permission

-rw-r--r-- 12 yash staff 128 Oct 2 12:31 myfile.txt
|[-][-][-]- [------] [---]
| | | | | | |
| | | | | | +-----------> 7. Group
| | | | | +-------------------> 6. Owner
| | | | +--------------------------> 5. Alternate Access Method
| | | +----------------------------> 4. Others Permissions
| | +-------------------------------> 3. Group Permissions
| +----------------------------------> 2. Owner Permissions
+------------------------------------> 1. File Type

17 | directory and chmod

Linux Command Line Tutorial

Everything is similar to the previous video the only difference is we will see the behavior of directories and its contents when changing their permissions.

This tutorial covers how to use the chmod command to change the access permission of files and directories.

In Linux, the file is associated with an owner and a group and assigned with permission access rights for three different classes of users:

The file owner
The group members
Others(everybody else)

File permissions can be changed. In order to do that we make use of chmod command.

There are three file permissions that apply to each class:

The read permission
The write permission
The execute permission

-rw-r--r-- 12 yash staff 128 Oct 2 12:31 myfile.txt
|[-][-][-]- [------] [---]
| | | | | | |
| | | | | | +-----------> 7. Group
| | | | | +-------------------> 6. Owner
| | | | +--------------------------> 5. Alternate Access Method
| | | +----------------------------> 4. Others Permissions
| | +-------------------------------> 3. Group Permissions
| +----------------------------------> 2. Owner Permissions
+------------------------------------> 1. File Type

16 | file and chmod

Linux Command Line Tutorial

This tutorial covers how to use the chmod command to change the access permission of files and directories.

In Linux, the file is associated with an owner and a group and assigned with permission access rights for three different classes of users:

The file owner
The group members
Others(everybody else)

File permissions can be changed. In order to do that we make use of chmod command.

There are three file permissions that apply to each class:

The read permission
The write permission
The execute permission

-rw-r--r-- 12 yash staff 128 Oct 2 12:31 myfile.txt
|[-][-][-]- [------] [---]
| | | | | | |
| | | | | | +-----------> 7. Group
| | | | | +-------------------> 6. Owner
| | | | +--------------------------> 5. Alternate Access Method
| | | +----------------------------> 4. Others Permissions
| | +-------------------------------> 3. Group Permissions
| +----------------------------------> 2. Owner Permissions
+------------------------------------> 1. File Type