So I’m working on a server from home.
I do a cat /sys/class/net/eth0/operstate and it says unknown despite the interface being obviously up, since I’m SSH’ing into the box.
I try to explicitely set the interface up to force the status to say up with ip link set eth0 up. No joy, still unknown.
Hmm… maybe I should bring it down and back up.
So I do ip link set eth0 down and… I drive 15 miles to work to do the corresponding ip link set eth0 up
50 years using Unix and I’m still doing this… 😥
I still prefer net-tools and use ifconfig eth0 up That ip mess I’d rather do without, and those funky UU device/interface names I wish them out of my system
By the way, what system/init/svc manager are you using? With 50y in your back, cron job to check if it is up and resetting it while you are away. You can always remotely cancel the cronjob … but it will be a new mistake not the old one :)
I started on Irix and ultrix if you remember those, what would I know :)