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Re: Still unable to restart networking on Debian 9 text mode only

On 23.11.2018 17:31, Luciano Andress Martini wrote:
Good morning,

IMPORTANT: Network Manager was not being installed automatically by
the Debian DVD when I do not mark the graphical interface.

I tried a fresh Debian install without graphical interface but using
the graphical installator I am running Debian 9.6.

Then I edited /etc/network/interfaces and restart the system, to see
if the ip was changed. And yes, it worked. So this file is still being
used in some way - humm that seems to be the correct place to
configure my interface isn't?

Well, I edited it again, now to try change the ip but without
restarting the system - like in all servers real situation, you don't
want to go after the server. 
If you have NetworkManager installed and connection was already setup and working, this task is accomplished by only 2 commands:
    # nmcli con mod "MyConnectionName" ipv4.addresses ""
    # nmcli con up "MyConnectionName"
That's it. After that your ip address will be set to "". No need to take your interface down, restart networking or reboot system. And of course this method works over ssh connection.
Any information about connection names, available configurable properties, etc could be done via nmcli with bash auto-complete being a convenient helper.

NM is great. I really don't understand why people think it's only for systems with GUI and hate it, while having trouble with editing /e/n/i for anything more complex than changing ip address.

With kindest regards, Alexander.

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