File permissions are core to almost everything you do on your Linux machine, from viewing a PDF to saving an image and running an app. The core model keeps things simple, but there are quite a few ...

One way to get a little more clarity on this is to look at the permissions with the stat command. The fourth line of stat’s output displays the file permissions both in octal and string format: $ stat ...

In last month's issue, I talked about Linux permissions (see "It's Better to Ask Forgiveness..." in the May 2015 UpFront section). I could have covered SUID, GUID and sticky bit in the same article, ...