I have created a new admin group which I am a member of. I have changed permissions of the file
test_admin.txt so that it can only be read and written by members of this group: ls -a returns
----rw---- 1 joe.bloggs admin 37 Feb 6 16:49 test_admin.txt
groups joe.bloggs returns
joe.bloggs : linkmed admin
I have logged out and back in as suggested by Why can't I write eventhough I have group permissions? but I still receive the same error message
test_admin.txt: Permission denied
What am I doing wrong?