Linux: Adjust LCD laptop backlight brightness from command line

I needed to find out how can I change my laptop backlight brighness using just a command line. Solution for that problem was easier than I thought because you can do that just with one line =)

On my laptop which is Dell Latitude D430 brigness file was on /sys/class/backlight/dell_backlight directory but it’s probably almost […]

IP Traffic Monitor already listening on eth0

If you get this “IP Traffic Monitor already listening on eth0” error when you are trying to use iptraf:

IP Traffic Monitor already listening on eth0

Or any other interface like eth1 or wlan0 and so on…

Be sure that you don’t have any iptraf applications running:

ps ax|grep iptraf

and after that you […]