I have this file:
-rw-rw----+ 1 git git 16959 Jul 25 07:37 github.conf
I am this guy:
$ whoami
admin
$ id
uid=501(admin) gid=501(admin) groups=501(admin),4(adm)
I can also say this:
$ cat /etc/passwd | grep admin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
admin:x:501:501:,,,:/home/admin:/bin/bash
$ cat /etc/group | grep -E 'admin|git'
adm:x:4:admin
git:x:500:
admin:x:501:admin
How is it possible I can read this file github.conf. I don't belong to the git group and I am not git. How is it then possible?
It looks you have extended permissions on the file (signified by the +) when listing the permissions. run:
getfacl github.conf
to see the extended access control list permissions