oracle linux assign ip address

The "/etc/sysconfig/network-scripts/ifcfg-eth0" file holds the network configuration for the "eth0" adapter. If you have multiple network adapters, you would expect additional configuration files (eth1, eth2 etc.). The following example contains the configuration for a DHCP adapter.

The following example is for a static IP address.

The "/etc/hosts" file contains information for local name resolution.

The "/etc/resolv.conf" file is used to configure the location of the DNS servers to be used for name resolution. There can be multiple "nameserver" lines, one for each nameserver.

The current network settings are displayed using the ifconfig command.

The system-config-network-tui and system-config-network commands start a text-based network configuration tool.

Navigate using the "tab", "arrow" and "return" keys. The "Device configuration" option gives a list of network devices.

Selecting the device allows you to edit the adapter's network configuration, which is saved to the "/etc/sysconfig/network-scripts/ifcfg-eth0" file.

The "DNS configuration" option on the first screen allows you to modify the configuration in the "/etc/sysconfig/network" and "/etc/resolv.conf" files.

The network configuration can also be initiated using the setup command.

The "Network Connections" dialog is available from the menu (System > Preferences > Network Connections) at the console.

Highlighting the device and clicking the "Edit" button allows you to view or alter the configuration of a device.

For more information see:

• RHEL6 Documentation
• Linux man pages
• RHCSA and RHCE

Hope this helps. Regards Tim...

Back to the Top.

Created: 2012-03-24  Updated: 2019-07-31

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About Tim Hall Copyright & Disclaimer

• This tutorial is available in an Oracle-provided free lab environment .
• It uses example values for Oracle Cloud Infrastructure credentials, tenancy, and compartments. When completing your lab, substitute these values with ones specific to your cloud environment.

Create VLANs on Oracle Linux

Introduction

VLANs or Virtual Local Area Networks allow the network to be divided into smaller logical sections, or broadcast domains, to better manage the amount of traffic being generated by the attached systems.

A VLAN separates multiple network devices into logical groups that can communicate as though they are attached to the same network, regardless of their actual physical location on the broadcast LAN.

VLAN tags are used to identify the separate VLAN networks, with network switches deciding how to route traffic within and between systems based on the VLAN tags.

This lab, demonstrates how to:

• Create a VLAN interface using the nmcli command
• Delete a VLAN interface using the nmcli command
• Create a VLAN interface using the ip command
• Delete a VLAN interface using the ip command

Prerequisites

• A cloud instance system with current release Oracle Linux installed

View Available Network Interfaces

Follow the instructions in Oracle Linux Lab Basics to see how to establish an SSH connection and log in to the ol-node01 instances.

The two relevant sections are:

• Copy Public IP Address
• Connect to Oracle Linux Instance

Use the nmcli device command to view available network interfaces.

Command output:

DEVICE TYPE STATE CONNECTION ens3 ethernet connected ens3 ens5 ethernet disconnected -- ens6 ethernet disconnected -- ens7 ethernet disconnected -- lo loopback unmanaged --

The output show four devices ens3 , ens5 ens6 , and ens7 . These network devices are currently disconnected (unused) and available. The next step is to create parent devices for the VLAN interfaces on some of these devices.

Create VLAN Interface Using nmcli

This task uses the nmcli command to create and manage VLANs.

Note: VLAN interfaces created with the NMCLI utility will still be present after a system reboot,

Use the sudo nmcli connection add type vlan command to create a VLAN connection.

Supply the following options:

• con-name : vlan10-con
• ifname : vlan10-if
• VLAN tag id : 10

Connection 'vlan10-con' (25152b16-aee2-4d99-90ad-e44b9c02eb40) successfully added.

Use the sudo nmcli device command to view the new VLAN connection.

DEVICE TYPE STATE CONNECTION ens3 ethernet connected ens3 vlan10-if vlan connecting (getting IP configuration) vlan10-con ens5 ethernet disconnected -- ens6 ethernet disconnected -- ens7 ethernet disconnected -- lo loopback unmanaged --

The output shows a new vlan10-if interface and a new vlan10-con connection using device ens5 with a vlan ID 10 . Output also shows its state as ‘connecting’. This is the default for the new VLAN interface because Dynamic Host Configuration Protocol, or DHCP, is used to acquire its IP settings.

Use the sudo nmcli connection command to view the UUID of the new vlan10-con connection.

Example output:

NAME UUID TYPE DEVICE vlan10-con 25152b16-aee2-4d99-90ad-e44b9c02eb40 vlan vlan10-if ens3 17b6d01f-368c-4628-8ed1-134c0f0f410d ethernet ens3

Assign an IP Address Using nmcli

This task configures a static IPv4 address to the vlan10 connection. When configuring manual IPv4 or IPv6 address settings, you can set static IP addresses, network masks, default gateways, and DNS servers.

Use the sudo nmcli connection modify command and supply the following values:

• The connection to modify: vlan10-con
• The ipv4.addresses command option
• The IP address and netmask: '192.168. 10.10./24'

Use the command ` sudo nmcli connection modify vlan10-con ipv4.method manual` to change the default DHCP setting.

Use the ip addr command to view the addresses assigned to the network interfaces.

Example partial output:

... ... 3: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0a:15:4c brd ff:ff:ff:ff:ff:ff 4: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff 5: ens7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0a:d4:70 brd ff:ff:ff:ff:ff:ff 5048: vlan10-if@ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default > > qlen 1000 link/ether 02:00:17:0a:15:4c brd ff:ff:ff:ff:ff:ff inet 192.168.10.10/24 brd 192.168.10.255 scope global noprefixroute vlan10-if valid_lft forever preferred_lft forever inet6 fe80::d4f3:8725:9352:d6ac/64 scope link noprefixroute valid_lft forever preferred_lft forever

Note: If the address does not appear for ‘vlan10-if@ens5’, run the ‘ip addr’ command again.

Change the State of VLAN Connections

Next, change the state of VLAN connections and their parent links. This task demonstrates the dependency between VLAN connections and parent links by changing the state of both.

Note: The output from the ip addr command in the previous task showed both the VLAN connection and its interface link as UP .

Run the command sudo nmcli connection down vlan10-con to deactivate the VLAN connection.

Connection 'vlan10-con' successfully deactivated (D-Bus active path: /org/freedesktop/> NetworkManager/ActiveConnection/12236)

Run the sudo nmcli connection command to view connections.

NAME UUID TYPE DEVICE System ens3 17b6d01f-368c-4628-8ed1-134c0f0f410d ethernet ens3 vlan10-con 25152b16-aee2-4d99-90ad-e44b9c02eb40 vlan --

The output shows the vlan10-con connection without an interface device listed.

Run the ip addr command again to view the state of the interfaces.

... ... 3: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0a:15:4c brd ff:ff:ff:ff:ff:ff 4: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff 5: ens7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000

The output still shows the ens5 parent link UP , but vlan10-if@ens5 is gone.

Run the sudo ip link set ens5 down command to change the state of ens5 .

The command does not return any output.

Run the command sudo nmcli connection up vlan10-con to activate the VLAN Connections.

Error: Connection activation failed: The device could not be readied for configuration Hint: use 'journalctl -xe NM_CONNECTION=25152b16-aee2-4d99-90ad-e44b9c02eb40 + NM_DEVICE=vlan10-if' to get more details.

Note: When the parent device is DOWN , it prevents the VLAN device from coming up.

Run the command sudo ip link set ens5 up to bring the VLAN parent device up.

Rerun the command sudo nmcli connection up vlan10-con to bring the VLAN device up.

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/12249)

View VLAN Configuration Files

The /proc/net/vlan directory stores files containing configuration information about the configured VLAN interfaces.

Run the command ls -l /proc/net/vlan to list the configuration files in the directory.

total 0 -rw------- 1 root root 0 May 10 13:33 config -rw------- 1 root root 0 May 10 13:33 vlan10-if

Run the command sudo cat /proc/net/vlan/config to view the contents of the ‘config’ file.

VLAN Dev name | VLAN ID Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD vlan10-if | 10 | ens5

The contents of config contains the VLAN name, its VLAN ID and associated device.

Run the command sudo cat /proc/net/vlan/vlan10-if to view its contents.

Configuration text:

vlan10-if VID: 10 REORDER_HDR: 1 dev->priv_flags: 1021 total frames received 0 total bytes received 0 Broadcast/Multicast Rcvd 0 total frames transmitted 18 total bytes transmitted 1248 Device: ens5 INGRESS priority mappings: 0:0 1:0 2:0 3:0 4:0 5:0 6:0 7:0 EGRESS priority mappings:

The contents of vlan10-if shows counts for transmitted and received frames and bytes, and any traffic priority settings for traffic in and out of this device.

Delete VLAN Interface Using nmcli

Next deactivate the connection.

Run the command sudo nmcli connection down vlan10-con to deactivate the connection.

Run the command ip addr to verify the device is no longer listed.

The VLAN connection is no longer listed.

Run the command sudo nmcli connection to list available connections.

The VLAN connection information is still present.

Run the command sudo nmcli connection delete vlan1-con to delete the connection.

Connection 'vlan10-con' (25152b16-aee2-4d99-90ad-e44b9c02eb40) successfully deleted.

The output shows the connection was successfully deleted. This can be verified by running sudo nmcli connection .

Create VLAN Interface Using ip

This task, uses the ip command to create and manage a VLAN.

Note: VLAN interfaces created using the ip command do not persist after a reboot of the system.

Run the ip link command to identify the existing network devices.

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:08:b9:1a brd ff:ff:ff:ff:ff:ff 3: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:0a:15:4c brd ff:ff:ff:ff:ff:ff 4: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff 5: ens7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:0a:d4:70 brd ff:ff:ff:ff:ff:ff

Use ens6 to create a VLAN interface.

Run the command sudo ip link add and set ens6 as the physical device to use, vlan11-if as the interface name, vlan as the connection type, and set the VLAN I to 11 .

Rerun the ip link command to view the new VLAN.

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:08:b9:1a brd ff:ff:ff:ff:ff:ff 3: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:0a:15:4c brd ff:ff:ff:ff:ff:ff 4: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff 5: ens7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 . link/ether 02:00:17:0a:d4:70 brd ff:ff:ff:ff:ff:ff 5114: vlan11-if@ens6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff

Assign an IP Address Using ip

Now assign a static IP address to the VLAN.

Run the command sudo ip addr add to assign the ip address and netmask to the interface.

Run the command sudo ip link set vlan11-if up to change the state to UP

The command changes the state of the VLAN interface ( vlan11-if ) to UP .

Use the following commands to verify the VLAN connection state, and its assigned IP address.

Run the sudo nmcli connection :

NAME UUID TYPE DEVICE System ens3 17b6d01f-368c-4628-8ed1-134c0f0f410d ethernet ens3 vlan11-if 8da0b0b8-c72b-437b-b2ec-62670187d39e vlan vlan11-if

Run the ip addr command:

Partial command output:

... ... 4: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff 5: ens7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 02:00:17:0a:d4:70 brd ff:ff:ff:ff:ff:ff 5114: vlan11-if@ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 02:00:17:0e:25:14 brd ff:ff:ff:ff:ff:ff inet 192.168.11.11/24 scope global vlan11-if valid_lft forever preferred_lft forever inet6 fe80::17ff:fe0e:2514/64 scope link valid_lft forever preferred_lft forever

Delete a VLAN Using ip

Complete the steps to delete the VLAN device.

Run the command sudo ip link set vlan11-if down to bring the device connection down.

Run the command sudo nmcli device to view the state of the device.

DEVICE TYPE STATE CONNECTION ens3 ethernet connected ens3 ens5 ethernet disconnected -- ens6 ethernet disconnected -- ens7 ethernet disconnected -- lo loopback unmanaged -- vlan11-if vlan unmanaged --

The output shows the VLAN is present and unmanaged .

Run the sudo ip link delete command to delete the VLAN device.

Verify the connection is gone with the sudo nmcli device command.

The VLAN device is gone.

Run the sudo cat /proc/net/vlan/config file to view its contents.

VLAN Dev name | VLAN ID Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD

The file shows all VLANs are gone.

For Additional Information

See other related resources:

• Oracle Learning Library
• Oracle Documentation
• Video: Create VLANs in Oracle Linux with the NMCLI and IP Utilities

More Learning Resources

Explore other labs on docs.oracle.com/learn or access more free learning content on the Oracle Learning YouTube channel . Additionally, visit education.oracle.com/learning-explorer to become an Oracle Learning Explorer.

For product documentation, visit Oracle Help Center .

Copyright © 2022, Oracle and/or its affiliates.

How to Set Static IP Address and Configure Network in Linux

If you are a Linux system administrator, time will come when you will need to configure networking on your system. Unlike desktop machines where you can use dynamic IP addresses, on a server infrastructure, you will need to setup a static IP address (at least in most cases).

Read Also: How to Set or Change System Hostname in Linux </p

This article is meant to show you how to configure static IP address on most frequently used Linux distributions.

For the purpose of this tutorial, we will use the following Internet Protocol version 4 (IPv4) details:

Configure Static IP Address in RHEL/CentOS/Fedora:

To configure static IP address in  RHEL / CentOS / Fedora , you will need to edit:

Where in the above "ifcfg-eth0" answers to your network interface eth0 . If your interface is named “ eth1" then the file that you will need to edit is "ifcfg-eth1" .

Let’s start with the first file:

Open that file and set:

Note : Make sure to open the file corresponding to your network interface. You can find your network interface name with ifconfig -a command .

In that file make the following changes:

You will only need to edit the settings for:

• DNS1 and DNS2

Other settings should have already been predefined.

Next edit resolve.conf file by opening it with a text editor such as nano or vi :

Once you have made your changes restart the networking with:

Set Static IP Address in Debian / Ubuntu

To setup static IP address in Debian / Ubuntu , open the following file:

You may see a line looking like this:

Change it so it looks like this:

Save the file and then edit /etc/resolv.conf like this:

Restart the networking on your system with:

Your static IP address has been configured.

Conclusion:

You now know how to configure a static IP address on a Linux distro. If you have any questions or comments, please do not hesitate to submit them in the comment section below.

Previous article:

Next article:

Each tutorial at TecMint is created by a team of experienced Linux system administrators so that it meets our high-quality standards.

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32 thoughts on “How to Set Static IP Address and Configure Network in Linux”

The time will come when you will need to configure networking on your system. Unlike desktop machines where you can use dynamic IP addresses, on a server infrastructure, you will need to set up a static IP address (at least in most cases).

Terrible – and my ‘ linux distro ‘ isn’t the same as yours, there’s no ‘ /etc/sysconfig/ ‘ folder.

In Ubuntu 20.04 there is no interfaces file they switch to netplan . If you can update this article to include the new change it will help a lot.

thanks Raouf

Well, this isn’t correct. Just trashed my Linux mint distro

Is it public Static IP? or can I use to access data from other networks?

Failed to restart network.service: Unit network.service not found.

I’m asking a question on a fairly old thread, but just in case, is it possible to do this on a WIFI network?

For example, when using the first command (# nano /etc/network/interfaces ) in Ubuntu, the result I see is:

There isn’t an “ eth0 ” on my server because it is connected by WIFI only. Will it still work using another option?

Yes it will work I think so, just change the settings in the interfaces file as explained in this article.

I set the static IP in ifcfg-eth0, added HWADDR and UUID, but on reboot system does not associate the IP to eth0.

This is VM. Any idea why its happening and steps to troubleshoot.

I think you need to make sure that you select “ manual ” and the correct IP address, subnet mask, and gateway and save the configuration as explained in the article. Also, I personally would select a new and different IP address, so that you can really check if it has been saved by opening the terminal and typing:

after a restart.

If i set ip address as static am not able to ping google.com why and also packages are not installed.

Please give me reply as soon as possible.

@Rajeshkar,

Please add the DNS Name servers in your /etc/resolv.conf file..

@Ravi Saive thanks for your reply , yes i did /etc.resolv.conf also but getting the same problem

@Rajesekar,

The file is /etc/resolv.conf , in this file add your DNS name servers for example.

When I enter the /etc/resolv.conf file, what is it supposed to look like? And when you say “edit” do you mean delete what’s there and write what you’ve provided, or just add new lines?

Hello Marin, Thank you very much for this article. It was a major help in my class project. This is my first time using a vm and it is an awesome learning experience. I’m really glad I ran into this article, it was well written and easy to follow.

Just wanted to say a million thank you’s for this well-written, comprehensive and easily-understood article! Awesome stuff! A real lifesaver too, as I had to quickly configure a static IP for myself to get access to remote computing. Thank you! :-D

A question from a linux newbie. Does this instruction apply for both ubuntu running on my desktop PC as well as debian linux on an embedded board?

Yes, the instructions will works on any Debian/Ubuntu based distribution without any issues..have you tried on your embedded board? does these instructions worked? let us know.

Hi Ravi, thanks for your reply.

Default the folder /etc/sysconfig does not exist on my embedded system. Of Course i could create it as well as the files mentioned, but it would be out of the context of this instructions.

Thanks, Rob

I found here very good stuff! You are doing an excellent job and I like your site! Thanks!

Thanks for finding this site very useful and thanks for appreciating our work, Keep visiting for more such useful articles…

Great job, I was I actually looking for an article like this one. So thank you so very much. Keep up the good work.

Thanks for appreciating and finding this article useful, keep connected to Tecmint for such wonderful articles…:)

What if I have 2 NICs on my server one for LAN & one for WAN and I want to set one of them (WAN) as default gateway? How to configure this server as gateway and as a router.

The easiest way to add default gateway using route command as shown:

Don’t forget to replace the gateway IP address and interface-name in the above command.

One can also use following command to setup static IP on eth0 interface for example. # ifconfig eth0 192.168.1.1 netmask 255.255.255.0 up # route add default gw 192.168.0.1 # service network restart

Thanks for the tip, but I think setting IP address directly from the commandline using ifconfig and route will only allow you to set temporarily, once you reboot, these settings disappears. So, the best option to set static IP address permanently in network configuration files only….

wipe on reboot, so that best option is to set permannetly

Hello Ravi, What is difference between the service “NetworkManager” and “network”

@Augustine,

This article will help you to understand the difference between and NetworkManager and Network: http://askubuntu.com/questions/1786/what-is-the-difference-between-network-manager-and-ifconfig-ifup-etc

Why do we need to specify DNS in both ifcfg-eth0 and resolvlf.conf?

Hello Augustine,

Actually if you have added the DNS servers in the ifcfig-eth0 file the DNS servers will be automatically added to /etc/resolv.conf. You can skip defining the DNS servers in the ifcfig-eth0 file, but then you will need to have them set in /etc/resolv.conf manually. It’s a good practice to make sure that the DNS servers are specified correctly in both files, this is why the article says to set them in both files.

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VirtualBox host only adapter interface doesn't get an IP address in Oracle Linux 8

I have configured two VMs with Oracle Linux 8 on VirtualBox. Each VM:

• Adapter 1 : NAT, each has connectivity to the internet
• Adapter 2 : Host only adapter, Which doesn't shows a IP address!

Each configured with the same Hhost only adapter DHCP server.

• Host only adapter interface is enp0s8
• Nat interface is enp0s3

What am I missing here? Why does interface enp0s8 has no IP addres and why doesn’t the manual IP assignment work?

• oracle-linux

• I think this is an old bug in VirtualBox. Try to exchange the adapters, so Adapter 1 is the Host Only. –  harrymc May 17, 2022 at 19:36
• @harrymc , Well I tried to do so , But then I didn't had an IP address for my Adapter 2 , which is the NAT interface , so I didn't had internet connectivity. Very strange... Thanks –  Arik Jordan Graham May 18, 2022 at 20:05
• If the DHCP of the host-only network isn't working, static IPs might be the solution. Try perhaps to reinstall VB, hopping you're using the latest version. –  harrymc May 18, 2022 at 20:31

3 Answers 3

There's been ongoing discussion on the answer posted by John . But I didn't find those answers/discussions working towards a plausible resolution. May be I missed something? But surely I read tons of articles/posts by now.

So here's my answer which should resolve the issue of the main question relating to assigning IP address while using Host Only Network Adapter.

When I spin-up a virtual machine with a Host Only Network Adapter by default, the VM doesn't get an IP on an interface called enp0s8 . This interface is valid for Debian 10. But, I am able to see an IP is assigned to enp0s3 interface. Yes, all the preceding comments are correct mentioning IP does not get assigned! However, the idea of assigning a VM to a Host Only Adapter is to be able to communicate to this new VM from host machine. And since, there's no IP assigned to this VM, host machine simply will not be able to connect to it.

For Debian/Ubuntu OS, you need to edit this file /etc/network/interface .

Then update the file with below contents. Note, there are 4 spaces for address and netmask directives.

Please note, I set up static instead of dhcp . This we should be able to assign a static IP to a particular VM. Now, perform restart on the VM.

Do a ping test from host machine with VM static IP: 192.168.56.11 . You should be able to ping success result. As such, you should be able to connect to this VM using SSH login as well i.e., ssh [email protected] . Use the username and password of your VM OS.

Hope this helps someone!

• 1 thanks a lot. After a few hours of trying, this is what worked for me –  Allan Vital Dec 9, 2022 at 11:29

Simply, request a new IP from DHCP server:

Virtualbox host only adapter interface doesn't get an IP

That is entirely normal.

A Host Only Adapter is isolated and does not include Internet. The Host Only machine should be able to communicate with the Physical Host Machine, and then would have an IP on the Host Machine.

Change the Host Only Adapter to NAT if you wish it to have Internet Access.

To avoid confusion, here is a decent article on connecting a Host Only VM to a Host machine

Connect a Host Only VM to Host

Create the Virtual Network First, you must set up a virtual network that the host-only adapter(s) will communicate through. In the VirtualBox window, click File > Host Network Manager > Create. Check Enable under the DHCP Server column of the network you just created. Select your network and click Properties. In the Adapter Tab, select Configure Adapter Manually and use the following settings: IPv4 Address: 192.168.56.1 IPv4 Network Mask: 255.255.255.0 In the DHCP Server Tab, make sure that Enable Server box is checked, and use the following settings: Server Address: 192.168.56.100 Server Mask: 255.255.255.0 Lower Address Bound: 192.168.56.3 Upper Address Bound: 192.168.56.254 Click Apply and then Close Add a Host-Only Adapter to the Guest Machine For each guest you want to communicate with using the network from the previous step, you need to add a host-only adapter. Select the appropriate guest machine Click Settings > Network Under the Adapter 2 tab, input the following settings: Enable Network Adapter: Checked Attached to: Host-Only Adapter Name: vboxnet0 (NOTE: this should be the name of the network you created in the previous steps) Click OK

• 1 Having an IP address is not related to having Internet access. VirtualBox has a built-in DHCP server which is supposed to issue IP addresses to VM guests in this case. –  u1686_grawity May 17, 2022 at 18:48
• This is not correct , the VM should have been assigned a ip address from the DHCP pool. I have tried it on another VM before and It did assigned me an IP address , But this time I am not sure what I'm missing. Thanks anyway –  Arik Jordan Graham May 18, 2022 at 20:00
• A Host Only VM does not have Internet access, and only talks to its host. So it should not be part of a general DHCP pool. That would defeat the purpose of a Host Only machine –  John May 18, 2022 at 20:21
• I amended my answer to illustrate how to connect an isolated Host Only VM to its host –  John May 18, 2022 at 22:19
• DHCP pool does not required to be an Internet feature , It's a network feature. Anyway , How would you recommend to setup a VM with a internet connection and with a connection to other VMs. Thanks –  Arik Jordan Graham May 20, 2022 at 8:29

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How to configure IP addresses on Oracle Linux

I am trying to install Oracle Linux 7 on a VirtualBox 4.1.3. However I am a core DBA and not a sysadmin and am facing many difficulties. While trying to configure IP addresses I am getting following error:

cannot find device eth0

This is only one issue. I have to do many things such as installing rpms required for Oracle 11gR2 RAC, configure shared storage, etc which will also pose many problems. Do I need to master all these sysadmin activities by reading concepts manuals, etc. or there is a easier workaround? My aim is to install 11gR2 RAC and Grid Infrastructure.

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How to Assign an IP Address on a Linux Computer

Last Updated: July 28, 2022 Tested

Debian, Ubuntu, & Linux Mint

Red hat, centos, & fedora.

This article was co-authored by wikiHow staff writer, Jack Lloyd . Jack Lloyd is a Technology Writer and Editor for wikiHow. He has over two years of experience writing and editing technology-related articles. He is technology enthusiast and an English teacher. The wikiHow Tech Team also followed the article's instructions and verified that they work. This article has been viewed 728,433 times. Learn more...

This wikiHow teaches you how to assign a new IP address to your computer when using Linux. Doing so can prevent connection issues for the item in question.

• Press Ctrl + Alt + T or Ctrl + Alt + F1 (if you're on a Mac, substitute the ⌘ Command key for Ctrl .
• Click the text box at the top or bottom of the screen if possible.
• Open the Menu window and find the "Terminal" application, then click on it.

• A "root" account is the Linux equivalent of an Administrator account on a Windows or Mac computer.

• The top item should be your current router or Ethernet connection. This item's name is "eth0" (Ethernet) or "wifi0" (Wi-Fi) in Linux.

• In most cases, this is the "eth0" or "wifi0" item.

• To assign an IP of "192.168.2.100" to your ethernet connection ("eth0"), for example, you'd enter sudo ifconfig eth0 192.168.0.100 netmask 255.255.255.0 here.

• If you have a different DNS server address that you would rather use, enter that in the place of 8.8.8.8 .

• 5 Find the network connection that you want to change. This will normally be the Ethernet or Wi-Fi connection, which has an IP address currently listed on the right side of the window.

• For a network named "eno12345678", for example, you'd enter vi ifcfg-eno12345678 here.

• BOOTPROTO - Change dhcp to none
• Any IPV6 entry - Delete any IPV6 entries entirely by moving the cursor to the I on the left and pressing Del .
• ONBOOT - Change no to yes

• For example: to use "192.168.2.23" as your IP address, you'd type in IPADDR=192.168.2.23 and press ↵ Enter .
• Type in PREFIX=24 and press ↵ Enter . You can also enter NETMASK=255.255.255.0 here.
• Type in GATEWAY=192.168.2.1 and press ↵ Enter . Substitute your preferred gateway address if different.

Expert Q&A

• Some very specific Linux distributions will require you to go through a different process to assign an IP address. To see your specific distribution's specifications, check online. Thanks Helpful 0 Not Helpful 0

• Don't forget to switch back to the regular (non-root) user account when you're done. Thanks Helpful 1 Not Helpful 1

You Might Also Like

• ↑ https://danielmiessler.com/study/set_ip/
• ↑ https://www.youtube.com/watch?v=oQd5eG9BZXE&t=

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Set Static IP Address on Raspberry Pi

Recently, I set up Jellyfin media server on my Raspberry Pi. My Pi is wirelessly connected to the router and one problem I faced with this setup is accessing the media server on the TV or other devices.

Why? Because the Pi got assigned a random IP address at times between reboots. And since I was trying to access the media server running on Raspberry Pi though the IP address, it became an issue.

I had to manually enter the IP address on the TV every time the IP address changed. Finding the IP address of the Raspberry Pi was another challenge.

This is where static IP comes into play. If you Pi uses static IP, the IP address remains the same between the reboots.

This is one of the many scenarios where you are better off with a static IP assigned to your Pi. And in this tutorial, I'll discuss how you can achieve that.

Assigning static IP on Pi device vs on the router

Yes! There are two approaches for your Pi to have a static IP.

• You can set static IP on the Raspberry Pi itself
• You can have your router assign a static IP to the Pi

Both methods have their pros and cons.

Let's say you set the static IP on the Raspberry Pi . Your Pi will always seek the same IP address from the router (let's say 192.168.1.51). That's fine as long as the router remains the same. If you change your router and the new router insists on using a different subnet (let's say in the 172.16.12.0/32 range), then your PI won't be connected to WiFi like before. You'll have to manually update the network settings on the Pi again to use the new IP range. This could work when you just a couple of Pi devices and you can directly login to them (instead of SSH) or connect to them via Ethernet cable. For a fleet of Pis in random locations in the house.

Let's say you want to assign the Pi a static IP from the router . This way, you are changing nothing on the Pi. If you change the router, the Pi will get an IP address assigned automatically through the DHCP server. The problem is that it's not easy to assign static IP to devices on all the routers. Some internet companies provide routers with very little scope of configuration changes.

I cannot show how to assign static IP to different devices on the router, as it depends on what kind of router you have. So, I'll discuss how you can set static IP on the Raspberry Pi itself.

Setting static IP on Raspberry Pi

The procedure comprises the following four steps:

• Get the current IP address of the Pi (if you want to use this one as static IP)
• Get the gateway IP (router's IP)
• Get the DNS server address (optional)
• Use the above information to change network configuration

The first three steps can be easily done in the command line. The third step can be done easily in both the command line and GUI.

Step 1: Get the IP address of Pi

If you want to use the current IP address as the static IP,

This is very simple. In the terminal, type the following command:

You may also use this command:

Both will give you the current IP address of the Raspberry Pi.

As you can see in the screenshot above, my Raspberry Pi's IP address is 192.168.1.34.

Step 2: Get the gateway IP

This is also quite simple. To get the gateway IP address (your router's IP address), use this command:

As you can see in the screenshot below, the gateway IP in my case is 192.168.1.1.

Step 3: Get the DNS server details (optional)

Some people like to keep the same DNS server which is currently being used on the system. I think you can do without that as well. Most home users have the DHCP server handle it automatically anyway.

Still, if you want, you can get the DNS server address with:

Step 4 (Terminal Method): Change network configuration to set static IP

If you are accessing Raspberry Pi via SSH or if you prefer the command line, you can use the nmtui (network manager in terminal) tool.

Run this command:

You'll see an interface like this. Here, select Edit a connection and press Enter.

It will show the connections you have had in the past on your Pi. I believe you want to set the static IP for the currently connected network. Move down to the appropriate network. Now press tab a couple of times to select the Edit option and press enter.

Use the arrow key to scroll down to the IPv4 CONFIGURATION option. Change it from Automatic to Manual .

Next, select the Show option of IPv4 CONFIGURATION line.

Use the arrow keys to move down again and reach the IPv4 CONFIGURATION section again. This time you'll see option to add Address, Gateway and DNS servers.

Go to the Addresses line and click enter key. It may take you to the beginning. Scroll down back again.

Fill all the details such as IP address with mask, Gateway IP and DNS.

If you notice above, I used the gateway IP in DNS too. I also added 1.1.1.1, DNS of Cloudflare as an alternative.

After filling all the details, scroll down to the bottom, select OK and press enter.

Your changes are saved. You can exit the nmtui interface the same way (press Back and then Quit options).

Restart your Pi for the changes to take effect. You have successfully set up static IP on Raspberry Pi.

Step 4 (GUI Method): Change network configuration to set static IP

The same can be achieved from the graphical interface of Raspberry Pi OS.

First, click on the network icon and then go to the Advanced options and click Edit connections.

Here you go to IPv4 Settings, set it to manual and then add all the details such as IP address, mask, gateway IP, DNS server etc. You have all the details.

Restart your system and you can see that the static IP is now set on your Pi.

Going back to non static IP

If you don't want to use static IP anymore on Raspberry Pi, you can easily revert the steps and go back to dynamic IP.

How? Simply edit the network connection in question again. This time, change the IPv4 configuration to 'automatic' and save your changes. And that's it. You don't have to provide IP address, gateway IP etc anymore.

As I mentioned at the beginning of this tutorial, you should use a static IP from the router end specially if your Pi won't be easily accessed physically.

But if your device is in your hands all the time, you have the liberty of accessing and changing its configuration.

I hope you find this tutorial on setting a static IP on Raspberry Pi helpful. Please let me know if you have any questions.

Abhishek Prakash

Created It's FOSS 11 years ago to share my Linux adventures. Have a Master's degree in Engineering and years of IT industry experience. Huge fan of Agatha Christie detective mysteries 🕵️‍♂️

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VeeamON 2024 | #BounceForwardThrowback (Win Custom Shoes!)

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Announcing Support for Oracle Linux KVM!

• 7 days ago 2 April 2024

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Hot off the presses! Today, we’re announcing the general availability of the newest entry to our long list of supported hypervisors, with the addition of Oracle Linux KVM. As some of you may be aware, Veeam Backup & Replication has been supporting Red Hat Virtualization for several years now, which runs oVirt and KVM under the hood. Although Red Hat has stopped development on RHV in favor of OpenShift, Veeam Backup & Replication will continue supporting RHV as a source until December 2026 .

But let’s focus on what’s new: Oracle Linux KVM support as a source. The process to get up and running is straightforward: just download the oVirt KVM plug-in and install it on your VBR server. Once completed, you can head back into the console and go to Inventory à Add Server, and you’ll now see Oracle Linux KVM listed as an option.

The experience of adding a server is very similar to what Veeam users have come to expect: Just provide a DNS name or IP address, followed by credentials, and then you’ll be ready to start protecting workloads. But, as we all know, protecting workloads is only helpful if you can actually perform a restore.

One quick note: Previously, an account such as admin@internal would work, but after some digging, I found that as of oVirt 4.5.1 the authentication engine was changed to Keycloack. If you run into trouble when it comes to credentials, try the username format of admin@ovirt@internalsso.

With the server added you will now be prompted to deploy a backup proxy. This is required for VBR to interact with the hypervisor. The wizard will walk you through the straightforward process of either deploying a new proxy or connecting to an existing one. In this case, I opted to go through the Wizard and create a new oVirt KVM proxy. As part of the setup, you can assign specific networks, define an admin account for the proxy, as well as restrict which backup repositories can used.

Once all is said and done, you should be good to go to start creating backup and restore jobs. When it comes to restoring data, you definitely have a lot of flexibility. Backups can be restored back to Oracle Linux KVM, or you can choose to restore them to the public cloud (Microsoft Azure, Amazon Web Services (AWS) and Google Cloud environments), or even perform an Instant Recovery to another hypervisor (Nutanix AHV, VMware vSphere and Microsoft Hyper-V).

Looking to learn more? Be sure to check out the following resources:

• Download Veeam Backup for Oracle Linux KVM and Red Hat Virtualization
• Help Center documentation
• Veeam R&D oVirt KVM forum

• Chris.Childerhose
• Veeam Legend, Veeam Vanguard
• 6100 comments

 If only I had Oracle Linux KVM to test with.  Thanks for sharing Matt.

• wolff.mateus
• Veeam Vanguard
• 514 comments

Thinking about doing a homelab with that. Thanks for sharing @Matt Crape  

• Geoff Burke
• 1216 comments

Thanks @Matt Crape  Does it support SOSApi?

• TylerJurgens
• Veeam Legend
• 80 comments

Glad to see Veeam pushing for more hypervisor diversity. Even though I’m not an Oracle KVM user (today anyway), additional support for KVM based hypervisors is pretty awesome for many reasons. Looking forward to seeing what Veeam supports next.

Thanks  @Matt Crape  Does it support SOSApi?

I just was told not yet. 

• 1169 comments
• 5 days ago 4 April 2024

Looks awesome….wish I had some time to play around with this.  Looking forward to additional hypervisor support as well?  ::fingers crossed::

• 4 days ago 5 April 2024

@Matt Crape  Were you getting the “Failed to get certificate from Virtualization Manager ‘……. ‘ Message at the credential stage before you found that they had switched to keycloak?

• 4 days ago 6 April 2024

Thanks for sharing!!

• 1 day ago 8 April 2024

Hey Geoff - I was actually receiving a “Cannot authenticate user No valid profile found in credentials..” error message.

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