Do not run wireshark as user "root"!
Read some documentations about wireshark. Your problem isn't a Knoppix problem.
When I launch wireshark(from k-menu..run, or from the command line) it loads but doesn't list interfaces unless I do sudo wireshark or I suppose if I do su then wireshark. That's fine.
But sudo wireshark or su<ENTER>wireshark<ENTER> isn't working.
It worked yesterday but now when I try, I get this error
knoppix@Microknoppix:~$ su root
root@Microknoppix:/home/knoppix# wireshark
No protocol specified
(wireshark:4986): Gtk-WARNING **: cannot open display: :0
root@Microknoppix:/home/knoppix# su knoppix
knoppix@Microknoppix:~$ sudo wireshark
No protocol specified
(wireshark:503: Gtk-WARNING **: cannot open display: :0
knoppix@Microknoppix:~$
Do not run wireshark as user "root"!
Read some documentations about wireshark. Your problem isn't a Knoppix problem.
Thanks. I got it to work since some days back. For the record it was most likely this solution that I used
http://ask.wireshark.org/questions/7...erfaces-listed
$ sudo apt-get install wireshark
$ sudo dpkg-reconfigure wireshark-common
$ sudo usermod -a -G wireshark $USER
$ sudo reboot
AMD EPYC 7282 CPU Processor 16 Cores 32 Threads 2.8GHZ up to 3.2GHZ 120W no lock
$76.00
Intel - Core i7-12700K Desktop Processor 12 (8P+4E) Cores up to 5.0 GHz Unloc...
$419.99
Intel - Core i9-12900K Desktop Processor 16 (8P+8E) Cores up to 5.2 GHz Unloc...
$619.99
Intel Xeon E5-2697A V4 2.6GHz CPU Processor 16-Core Socket LGA2011 SR2K1
$39.99
Intel Core i5-12600KF Desktop Processor 10 (6P+4E) Cores up to 4.9 GHz Unlocked.
$139.59
Intel Quad Core i3-12100 3.3GHz 12MB LGA1700 12th Gen. CPU Processor SRL62
$45.93
AMD Ryzen 5 4500 6-Core 3.6GHz Socket AM4 65W CPU Desktop Processor
$79.00
Intel Core i9-13900KF Unlocked Desktop Processor - 24 Cores (8P+16E) & 32 Thread
$539.99
Intel 16 Core i7-13700T DESKTOP processor TURBO Boost 4.90Ghz CM8071504820903
$269.00
Intel Core i9-10850K (SRK51) 10-Cores 3.6GHz Socket FCLGA1200 CPU Processor
$178.00