File Permissions on Linux

This article discusses File Permissions in Linux .

USER AUTHORIZATION

There are 3 types of permission concepts in Linux.	These permissions have numeric values.
Read (r)	4
Write (w)	2
Execute (x)	1
Total numeric value:	7

To find out the ID of a user or group

Script:
id

The uid of the root user is 0 zero.

To see permissions on the terminal.

Command: ls -ln

When viewing permissions, 1 part represents "owner" and 2 part "group" represents 3 parts "other" authorizations.
Owner	group	other
drwxr	Xr	x

	The first 7 represents the owner, the second 7 represents the group, the third 7 represents the "other" 777
chmod is used to change file privileges	Chmod – removes permission	chmod -777 sharedfolder	Have all permissions removed.
Chmod+ allows	Chmod +400 sharedfolder	Since there is a 4 read authorization, and since the authorization starts from the owner in the first place, writing 0 to the group 0 other a 0 leaves the authority as it is. 400
	Remove permission from myself, the owner,	Chmod -400 Shared folder
	Owner i.e. giving me read authority for grop and other other than myself	Chmod +044 sharedfolder

Arif Akyüz
Senior Information Technologies System and Network Specialist

Arif Akyüz
Content Producer & Cyber Security Expert
[email protected]