How To Configure Linux Server – Configuring a Linux router is easy, just make sure the router has two interfaces connected to the network and enable iptables for packet forwarding and NAT if necessary. There is more advanced configuration, but in this post we will create a Linux router on Ubuntu Server 20.04 that will allow LAN traffic through the Internet on the WAN interface with NAT.
Ubuntu Server 20.04 comes with netplan as the default network interface configuration tool. If you are not familiar with Netplan, read the previous article on Ubuntu Server 20.04 LDS – Basic Network Configuration with Netplan.
How To Configure Linux Server
This configuration below added interface enp0s3 to receive dhcp and enp0s8 to use IP address 10.10.10.1/24. If this is a freshly installed Ubuntu server, add red lines to your configuration file.
Install Ubuntu Server
The iptables command line won’t be saved after a system reboot, there are several ways to keep it running after a reboot. This time we will use an easy way to install iptables-persistent package on Ubuntu server.
It will ask you to save the current ipv4 and ipv6 iptables rules, then answer yes or no to save.
This command will save the iptables rules in /etc/iptables/rules.v4, which will then be reset by iptables-persistent on every reboot.
If everything goes well, we are done with creating a Linux router with Ubuntu Server 20.04 LDS. Depending on the topology, clients use the 10.10.10.0/24 network address. Then configure clients accordingly.
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Try Bing Google or open your browser to start browsing the web and see if it works.
You can see all the above steps to build a Linux router with Ubuntu Server 20.04 LDS from this YouTube video below. If you still have any issues, please leave your comments. Server is a variation of the standard you already know, adapted to networks and services. It is capable of running a simple file server as well as operating in a cloud with 50,000 nodes.
Unlike the desktop installation, the server does not have a graphical installer. Instead, it uses a text menu-based process. If you want to install the desktop version, check out our installation desktop tutorial.
This guide will give you an overview of installing from a DVD or USB flash drive.
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For a detailed guide on server capabilities and configuration, see our Community Server documentation.
See the server’s help pages for more details on hardware requirements. We also have several tutorials that explain how to create a DVD or USB flash drive.
Most computers boot automatically from USB or DVD, although in some cases this is disabled to improve boot time. If you do not see the boot message and “Welcome” screen that appears later, you must install your computer to boot from the installation media.
There should be a message on the screen when the computer starts up asking which key to press for the settings or boot menu. Depending on the manufacturer, this may be the case
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. Restart your computer and keep pressing this key until the boot menu appears, then select the disk with the installation media.
Before you type anything, the installer will display a menu asking you to select your keyboard layout and, if applicable, a variant.
If you don’t know the specific variant you want, go with the default – once the server is installed, you can easily test and change your preferences if needed.
Now we are ready to choose what you want to install. The menu has three options:
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The following two options are used to install specific components of a Metal as a Service (MAAS) installation. If you install MAAS, check the MAAS documentation for more information about it! The rest of this tutorial assumes you choose the first option,
This is usually automatic and you don’t need to enter anything on this screen, it’s for information only.
If there’s no network, the installer can continue anyway, and it won’t be able to check for updates. You can always configure the network after installation.
The next step is to configure the storage. The recommended installation is to set aside an entire disk or partition for execution.
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If you need to set up a more complex system, the manual option will allow you to select and reorganize partitions on each connected drive.
Drivers are listed with their system ID to aid identification. Enter using the arrow keys to select the drive you want to use.
If you didn’t expect this (for example, you selected the wrong unit), use the arrow keys to select and enter.
From the options at the bottom of the screen. This will take you back to the previous menu where you can select another drive.
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This shows a final confirmation step before the installer makes any destructive changes. Double check that everything is fine here, and you’re not going to reformat the wrong device!
There is no “undo” for this step, once the changes are confirmed, the indicated devices will be overwritten and any content may be lost.
The software is now installed on the disk, but there is additional information that the installer needs. The server must have at least one user known to the system, and a hostname. The user needs a password.
There is also a field to import SSH keys from Launchpad, One or Github. Enter the username and the installer will take the relevant keys and install it on the computer ready for use (for example, secure SSH login to the server).
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Once you are done entering the required information, the screen will now show the progress of the installer. The server now installs a brief set of useful software required by the servers. This dramatically reduces setup and installation time. Of course, once the installation is complete, you can install any additional software you may need.
Remember to remove the installation media, then press enter to reboot and start the server. Welcome!
Once the server is installed, you can now go ahead and create that file server or the multi-node cluster we mentioned!
You can see what’s latest on the server and what others are using on the server’s pages.
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The unit for desktop and server is one of the friendliest and most populous you’ll find. This means that if you get stuck, someone has probably already seen and solved the same problem.
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