Linux File Links and Permissions

Linux File Links and Permissions/shaare/5gKDcw

ln
Deleting, renaming, or moving the original file will not affect the hard link.

       INODE ← MYFILE.TXT → MY-SOFT-LINK
        ↑
MY HARD LINK

Command to check links:

ls -ltri

Example:

-rwxrwxrwx
 |   |  |
 |   |  └── Others
 |   └───── Group
 └───────── User

To remove write permission from all:

chmod a-w filename

To add read and write permission for user:

chmod u+rw filename

Example:

drwxrwxrwx
^   ^  ^
|   |  └── Others
|   └───── Group
└───────── User

Value	Permissions	Symbol	Mnemonic
0	No permission	---
1	Execute	--x	Xena
2	Write	-w-	Winnie
3	Execute + Write	-wx
4	Read	r--	Riri
5	Read + Execute	r-x
6	Read + Write	rw-
7	Read + Write + Exec	rwx

Example to set permissions:

chmod 764 file

Breakdown: