What is Access Control List and its types ?

It is a special kind of permission we are giving to the file system.

Think of the scenario when a user is not a member of a group created by you but still you want to give some read or write access, how can you do it without making the user a member of group, here ACL enters in the picture.

•  setfacl are used for setting up ACL
•  getfacl are used for showing ACL

–> There are two type of ACL :-

1. Default ACL

2. Access ACL

→ The default acl is used to set access control list on a specific directory

→ The access ACL is used to set permissions on any file or directory.

 Default ACL

• setfacl -m “d:o:perms” file_of_ name

Access ACL

To add permissions for a group

• setfacl -m “g:group:permissions” /path_of_file

To add permission for user

• setfacl -m “u:user:permissions” /path_of_file

To remove a specific entry

• setfacl -x “g:group” /path_of_file

To copy the ACL rule from one file to other

• getfacl file> file
• setfacl -M file_to_file

To remove all entries

• setfacl -b path_of_file

Conclusion: By completing this tutorial we had learned the technical integrity of ACL and its types.