@Neil:
I see in your logs the following string: [pid 7733] 19:01:11.385940 write(2, "must be setuid root", 19 <unfinished ...>
Could you please run (in a terminal): $ ls -l /usr/bin/sudo
and paste the result here?
@Neil:
I see in your logs the following string:
[pid 7733] 19:01:11.385940 write(2, "must be setuid root", 19 <unfinished ...>
Could you please run (in a terminal):
$ ls -l /usr/bin/sudo
and paste the result here?