The purpose of this tutorial is to show to use the Ubuntu ip command to see information about the local IP address, default gateway, and DNS servers on Ubuntu 20.04 Focal Fossa Linux. The IP address is used by your Ubuntu machine to talk to other devices on the network, like a router or other PCs. Keep in mind that your internal IP address is different from your system’s external IP.
networking
Ping sweep script to scan and monitor network
In this tutorial, we will provide a few Bash scripts to scan and monitor the network using combination of commands such as ping. Obviously, these scripts are no match to a full monitoring dedicated software like nagios, but they could be useful for small home brand networks, where implementing sophisticated monitoring systems can become too much overhead.
ssh_exchange_identification read connection reset by peer
The ssh_exchange_identification read connection reset by peer SSH error is something you may see in your terminal when trying to log in to a remote host or when your session expires on a Linux system. In this tutorial, we will go over a few different causes for this error and show you how to troubleshoot the connection on your system. Using one of our methods below will hopefully remedy the error and allow you to log in via SSH or maintain your current session.
ssh_exchange_identification: connection closed by remote host
If you are trying to SSH into a remote host from a Linux system, the ssh_exchange_identification: connection closed by remote host error is one you might encounter when trying to log in. In this tutorial, we will go over a few different causes for this error and show you how to troubleshoot the connection on your system. Using one of our methods below will hopefully remedy the error and allow you to log in via SSH.
bash: netstat: command not found – Debian/Ubuntu Linux
The netstat Linux command is used by system administrators to see information about network connections. Netstat is a powerful utility that can print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. It has been superseded by the ss command in recent years, but is still a viable tool for network diagnostics and troubleshooting.
Ubuntu 22.04 NTP server
NTP stands for Network Time Protocol and is used for clock synchronization across multiple computers. An NTP server is responsible for keeping a set of computers in sync with each other. On a local network, the server should be able to keep all client systems to within a single millisecond of each other.
Temporary failure resolving error on Ubuntu 22.04 Jammy Jellyfish Linux
The following tutorial will provide you with simple to follow steps on how to resolve the Temporary failure resolving error on Ubuntu 22.04 Jammy Jellyfish Linux. This error normally occurs when your internet is having connectivity problems, particularly with hostname resolution (the ability to map a website name to an IP address).
Linux: Create virtual network interface
On Linux, virtual network interface configuration isn’t something most people need to do very often, but it can come in handy sometimes. The system will recognize a virtual interface as a real, physical interface. linux create virtual network interface
How to check my IP address on Ubuntu 22.04 Jammy Jellyfish Linux
The objective of this tutorial is to learn how to identify internal and external IP address on Ubuntu 22.04 Jammy Jellyfish Linux. This can be accomplished via command line and GUI. We will cover the step by step instructions for both methods below.
How to install missing ifconfig command on Linux
Most of us longtime Linux users have the ifconfig command seared into our brain, after years of repetitive use. It comes as a shock to some when they type the command and are met with an error message (ifconfig command not found). Indeed, the command has become deprecated, but it’s still possible to install ifconfig command.
Netplan static IP on Ubuntu configuration
In this article we will discuss a netplan static IP configuration on Ubuntu Linux. Netplan allows for straightforward network IP address configuration using human-readable data-serialization language YAML. The article will also discuss a default Netplan network settings and the location of the Netplan configuration file.
Linux IP forwarding – How to Disable/Enable using net.ipv4.ip_forward
It may be necessary to configure Linux IP forwarding on a Linux system in certain scenarios. If the Linux server is acting as a firewall, router, or NAT device, it will need to be capable of forwarding packets that are meant for other destinations (other than itself).