![Chown command
• To change the owner / user of the file / directory.
• An administrator command
• Only the root user can change the owner of the
file / directory.
• Syntax:
chown [options] newowner file/dir name](https://image.slidesharecdn.com/filepermissions-150311032712-conversion-gate01/85/Filepermissions-in-linux-14-320.jpg)
![Chgrp command
• To change the group of a file / directory.
• An administrator command.
• Syntax :
chgrp [options] newgroup file/dirname](https://image.slidesharecdn.com/filepermissions-150311032712-conversion-gate01/85/Filepermissions-in-linux-15-320.jpg)
Filepermissions in linux
- 2. WHY FILE PERMISSIONS ? LINUX…. MULTITASKING SYSTEM MULTIUSER SYSTEM Permissions can be set to files and Directories.
- 3. chmod COMMAND • To change the permissions of a file or directory • Syntax : chmod assignment_expression filename • Assignment expression comprises Category of users Granting or denial of permission Types of users
- 4. Types of Users • Owner - owner of the file or directory. • Group - group of related users. • All/Other- Other users.
- 5. Types of Permissions • Read - read the file or list files in the directory • Write - add new content to a file or add new files to the directory • Execute - access the contents of a file or access files in the directory
- 8. VALUES FOR SYMBOLIC MODES
- 9. Chmod • SINGLE USER • Example : • Cmd : chmod u + r filename • The above command grants permission to a single user to read the file .
- 10. Chmod MULTIUSERS • Example : • Cmd : chmod u + rw , g = x ,o –w filename • The above command grants permissions to multiple users.
- 11. OCTAL NOTATION Cmd : chmod 761 filename Cmd : chmod u = rwx, g = rw,o = x filename The above commands are equivalent to each other.
- 12. EXAMPLES USING OCTAL VALUES
- 14. Chown command • To change the owner / user of the file / directory. • An administrator command • Only the root user can change the owner of the file / directory. • Syntax: chown [options] newowner file/dir name
- 15. Chgrp command • To change the group of a file / directory. • An administrator command. • Syntax : chgrp [options] newgroup file/dirname
- 16. THANK YOU