ACLs allow more granularity than octal permissions do. In this hands-on lab, we’ll set up a collaboration area using ACLs to get some practice reading `getfacl` output and creating `setfacl` input.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Use ACLs to Ensure Users Can Collaborate in the /opt/collab Directory
The first thing we need to do is make sure Bob, Adam, and Sally are all members of the same group. This will allow us to use ACLs on the group to allow access.
If we run
id bob,id adam, andid sallywe’ll see that they’re all members of themanagersgroup.We can run
setfacl -m g:managers:rwx /opt/collabto allow themanagersgroup access to the directory.- Remove Adam’s Access to the /opt/collab Directory
Since we can’t remove him from the group, we can use ACLs to remove an individual user’s access.
We can run
setfacl -m u:adam:0 /opt/collaband it will make sure thatadamcannot access the directory.
