Network Management

Contents:
  1. Network Manager
  2. Preventing Ubuntu from Auto-Creating DHCP Profiles
  3. nmtui
  4. INFORM directive
  5. Wireless Management
  6. Usefull Commands and Utilities
  7. netplan
  8. How to setup a network bridge in Boxes
  9. virbr0 - Virtual Bridge 0
  10. Video

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Network Manager



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Preventing Ubuntu from Auto-Creating DHCP Profiles



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nmtui

Use the nmtui utility. (Still looking for a solution for INFORM in place of STATIC).

Reference: https://raspberrypi.stackexchange.com/questions/137443/dhcpcd-conf-inform-vs-static-ip-vs-request-how-should-you-really-setup-a-static

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INFORM directive

If you want an IP Address outside the range managed by the DHCP server e.g. if you have a range of addresses reserved use the inform directive.

inform address[/cidr[/broadcast_address]]

This does not get a lease, just notifies the DHCP server of the address in use. You should also include the optional CIDR network number in case the address is not already configured on the interface.

dhcpcd.conf inform vs static ip vs request. How should you REALLY setup a static IP?:
https://raspberrypi.stackexchange.com/questions/137443/dhcpcd-conf-inform-vs-static-ip-vs-request-how-should-you-really-setup-a-static



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Wireless Management



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Usefull Commands and Utilities


How to connect to WiFi from the command line?:
https://askubuntu.com/questions/461825/how-to-connect-to-wifi-from-the-command-line#461831

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netplan

Netplan network configuration tutorial for beginners:
https://linuxconfig.org/netplan-network-configuration-tutorial-for-beginners

Setting a Static IP Address in Ubuntu 24.04 via the Command Line:
https://linuxconfig.org/setting-a-static-ip-address-in-ubuntu-24-04-via-the-command-line



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How to setup a network bridge in Boxes

:
https://discussion.fedoraproject.org/t/gnome-boxes-bridged-networking/77652

:
https://gitlab.gnome.org/GNOME/gnome-boxes/-/work_items/546

:
https://www.redhat.com/en/blog/setup-network-bridge-VM



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virbr0 - Virtual Bridge 0

virbr0 (Virtual Bridge 0) is a virtual network interface created automatically by libvirt to provide Network Address Translation (NAT) and internet access for virtual machines (VMs)

Chapter 16. Configuring virtual machine network connections:
https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10/html/configuring_and_managing_windows_virtual_machines/configuring-virtual-machine-network-connections



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Video

virbr0 static route:
https://www.google.com/search?q=virbr0&ie=UTF-8#fpstate=ive&vld=cid:715f8a38-da11-4253-a136-328fdfa570d3_9d45ed94,vid:6GYYCRXIkNg,st:1



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References

Network XML format:
http://libvirt.org/formatnetwork.html

Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20221010 - pre published v0.9