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In this tutorial we are going to learn how to install and configure Nagios Core from Repos on Ubuntu 18.04 for server resource consumption and availability monitoring. Nagios is an enterprise grade free and open source software that can be used to monitor servers, applications and networks. It also offers alerting services for servers, switches, applications and services. Nagios supports...

In this tutorial, we will discuss how to configure NFS server on Ubuntu 18.04 server. NFS operates on a server-client architecture and therefore to demonstrate how to configure NFS server on Ubuntu 18.04 server to share directories and files over the network and Ubuntu 18.04 desktop as our NFS client, follow through this guide. Network File system (NFS) is a commonly...

In this tutorial, we are going to learn how to enable ssh server on OPNsense. So you have installed OPNsense and can be able to login via web gui but login via ssh is timing out? # ssh -v [email protected] OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g 1 Mar 2016 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to 192.168.10.23...

In this tutorial, we are going to learn how to configure static IP Addresses using Netplan on Ubuntu 20.04/18.04 To manage network interfaces, Ubuntu 20.04/18.04 uses the Netplan utility. Netplan is a YAML network configuration abstraction for various backends The Netplan command has replaced the commonly used static interfaces configuration file, /etc/network/interfaces, with various network configuration files in the /etc/netplan/ directory. The...

In this tutorial, we are going to learn how to enable the ICMP ping response on QRadar SIEM. So you have installed IBM QRadar SIEM and trying to verify its connectivity using ping command but you realized that ping icmp requests are  being dropped? Well, this happens because by default, QRadar SIEM drops all ICMP traffic received on the management...

In this tutorial, we will learn how to check hardware information, block devices and filesystems on Linux system. Many a time as we interact with the Linux system in our day to day activities, there may arise a need to check on the mounted filesystems, available block devices, disk space usage, system hardware information or even file space usage. Well,...

When commands are run on a system, various processes associated with them are created. Among the roles of a system administrator, being able to determine what processes are running, monitor and manage them is a critical skill. There are several program tools that can be used to achieve this. In this tutorial, we are going to explore some of...

In this tutorial, we will learn how to Install and Configure NFS Server on RHEL/CentOS 7. Network File system (NFS) is a commonly used file-based storage system that allows remote systems to access files over a computer network and interact with them as if they were locally mounted. This enables system Administrators to group resources onto centralized servers on a...

In this tutorial, we are going to learn about how to create LVM logical volumes. Before we dive deeper, let us have a look at LVM architecture. LVM ARCHITECTURE OVERVIEW The structure of an LVM disk environment is simply illustrated in the figure below. LVM Logical Volumes Components The underlying structure of an LVM environment is a block device such a partition or...

So for some reason you just forgot the root password for your OPNsense router/firewall and you are now locked out and dont know what to do!!? Relax as in this article, we will show you How To Reset Or Recover Root Password On OPNsense from single user mode. You can also check our previous guide on how to install OPNsense...