i have one a laptop my Debian 8 working.
my strange problem, some times i can't do a update
to surf the net works# apt update -y
Fehl http://security.debian.org jessie/updates InRelease
Fehl http://security.debian.org jessie/updates Release.gpg
»security.debian.org« konnte nicht aufgelöst werden.
Fehl http://httpredir.debian.org jessie InRelease
.....
if i do reboot and redo the command it works, or not,
so why it is happen and how to make the connection more sure?
have a nice day
vinc