Configure Local DNS Server using Dnsmasq on Ubuntu 20.04
Welcome to our tutorial on how to install and configure local DNS Server using Dnsmasq on Ubuntu 20.04. "Dnsmasq is a lightweight, easy to configure, DNS forwarder and DHCP server. It is designed to provide DNS and optionally, DHCP and TFTP, to a small network. It can serve the names of local machines which are not in the global DNS".
If...
Setup Caching-Only DNS Server using BIND9 on Ubuntu 20.04
In this tutorial, we will discuss how to install and setup caching-only DNS server using BIND9 on Ubuntu 20.04. The Berkeley Internet Name Domain (BIND 9) is a versatile, classic and complete name server software that implements an Internet domain name server. It is the most widely-used name server software on the Internet. DNS on the hand refers to...
How to Monitor Disk Input/Output on Linux
In this tutorial, you will learn how to Monitor Disk Input/Output on Linux. In most cases whenever your Linux Server experience a performance slow down, the first thing you would want to check is the CPU or Memory usage using top, htop or any othet command. However all my seem well except the I/O Wait (wa, %iowait), a form...
How to Measure Memory Usage in Linux
Linux provides a handful tools for measuring and checking memory usage. In this tutorial, we are going to learn a quite a number of these tools so that we can be able to troubleshoot any memory related issues.
free
free command is one of the most popular commands for checking free and used physical memory as well as swap space on...
How to Measure CPU Usage in Linux
This simple guide will take you through how to Measure CPU Usage in Linux. CPU is critical to every other system operations. If a process consumes too much of CPU such that it becomes unavailable to other process, it causes performance bottleneck. Therefore, in order to troubleshoot any CPU related problems, you can use any of the following tools.
How...
Topic 200: Capacity Planning
Capacity Planning is the first topic of the LPIC-2 exam 201-405 It covers the following objectives as described in LPIC-2 Exam 201-405 Objectives.
Measure and Troubleshoot Resource Usage
Predict Future Resource Needs
In order to meet the first objectives, the following utilities are covered.
iostat
The iostat command is used to report the CPU as well as input/output statistics for devices and...
LPIC-2 Exam 202-405 Objectives
Topic 207: Domain Name Server
207.1 Basic DNS server configuration
Weight: 3
Description: Candidates should be able to configure BIND to function as a caching-only DNS server. This objective includes the ability to manage a running server and configuring logging.
Key Knowledge Areas:
BIND 9.x configuration files, terms and utilities
Defining the location of the BIND zone files in BIND configuration files
Reloading modified configuration and zone files
Awareness...
LPIC-2 Exam 201-405 Objectives
Topic 200: Capacity Planning
200.1 Measure and Troubleshoot Resource Usage
Weight: 6
Description: Candidates should be able to measure hardware resource and network bandwidth, identify and troubleshoot resource problems.
Key Knowledge Areas:
Measure CPU usage
Measure memory usage
Measure disk I/O
Measure network I/O
Measure firewalling and routing throughput
Map client bandwidth usage
Match / correlate system symptoms with likely problems
Estimate throughput and identify...
