Solved Linux (real or Host) slow boot time fix if you experience this

Hi folks
some updates which use the NetworkManager service now seem go through by default an agonisingly slow process of doing some wait for online.service -- what it's waiting for I haven't a clue but in extreme cases the system can take a minute or more to boot from normally a few secs.

A common cause is if you are using bridged networking and the bridge is down - try ensuring the bridge is associated with the correct NIC -- if you boot your Linux system on a machine with different hardware that could be an issue to look at first too before disabling the wait.online service.

e.g (from cockpit -- use a browser -- works from Windows too even if your Linux machine has no GUI itself installed - enter https://<your machine name / ip >:9090 ).




so to get round this simply disable this service : (it doesn't disable the NetworkManager service itself of course). Then it all works OK again.

systemctl disable NetworkManager-wait-online.service.

cheers
jimbo