Must of munged something in network connection

[Rocket J Squirrel]

steeldriver, thank you. But

admin@CCD6:~$ sudo service networking restart
[sudo] password for admin: 
stop: Unknown instance: 
networking stop/waiting
admin@CCD6:~$

Still,

admin@CCD6:~$ sudo service network-manager restart
network-manager stop/waiting
network-manager start/running, process 12213
admin@CCD6:~$

And Network Manager reappears. I began editing the Wired Connection to make it Manual, while during so, the computer glitched and a popup informing me that Ubuntu 12.04 suffered an Internal Error. I pressed "continue" and finished the edit, and saved it. I'm going to do a reboot now, see you on the farside.

[Rocket J Squirrel]

... and I'm back and IT'S ALIVE!

Many thanks to all for helping me repair this fumble. Great community here.

[Bucky Ball]

As the regular method of marking threads 'Solved' is broken, please edit the first post, Go Advanced and change the title prefix to Solved. Thanks.

PS: If you know how you fixed this please share. Did you just reboot after the internal error and everything was fine?

[Rocket J Squirrel]

As the regular method of marking threads 'Solved' is broken, please edit the first post, Go Advanced and change the title prefix to Solved. Thanks.

Aye, will do.

PS: If you know how you fixed this please share. Did you just reboot after the internal error and everything was fine?

Other than the first command (sudo service networking restart) not returning Good News, everything worked fine.

Network Manager is back; and today I needed to change the fixed IP address again to eliminate a conflict and Edit Connections in Network Manager followed by "sudo service network-manager restart" worked as advertised.

[steeldriver]

^^^ the 'unknown instance' response from the service networking restart is normal I think - it just means that since you have nothing (apart from the loopback interface) defined in the file, the service wasn't actually started