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LVM Management in CentOS/Red Hat 7 Linux
LVM (Logical Volume Manager) is the recommended partition method for CentOS/Red Hat 7 Linux. Specially, if we work on Mail Server, File Server, FTP Server, Web Proxy Server or any application where disk space changes frequently, the LVM partition is mandatory in this case. In my previous article, I discussed how to install CentOS 7.5 with LVM partitioning. If you are new here or CentOS 7 is not yet installed, I will suggest you to follow my previous article and install CentOS 7 with LVM partitioning and then continue this article. In this article, I will discuss how to manage LVM partitioning in CentOS/ Red Hat 7 Linux with the command line utility. Basic Components and Architecture of LVM Before going to start LVM management with command line tool, we should have basic knowledge on the basic LVM terms and architecture. The following three terms are the basic components of the LVM partitioning. Physical Volume: The underlying physical storage unit of an LVM is a block device such as a partition of a disk or the whole disk. To use the block device for an LVM logical volume, the device must be initialized as a physical volume (PV). Volume Groups: [...]
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Turn Computer into Wi-Fi Hotspot | September 17, 2015
Internet Connection Sharing is an awesome feature in windows operating system. Using this feature, you can turn your computer which has wireless network card integrated into Wi-Fi hotspot and share your internet connection with your friends or family members. Generally, each laptop has a wireless network card integrated by default. So, if you are a laptop user, you can turn your laptop into Wi-Fi hotspot so easily. If you are a Desktop user, you can also turn your desktop as [...]
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MikroTik Wireless AP Configuration with DHCP using Winbox | October 22, 2019
MikroTik Wireless Router is one of the most popular and stable WiFi Routers. WiFi Zone for an ISP or for an office or for a home can easily be configured with MikroTik WiFi Router. MikroTik has a lot of WiFi Routers that can be used as a WiFi Access Point (AP), a WiFi Station or a WiFi Repeater. MikroTik Wireless Router can also be used as both WiFi Station and WiFi AP simultaneously. The simple usage of MikroTik Wireless Router [...]
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MikroTik WiFi Frequency Band and Channel Width Explanation | January 10, 2020
MikroTik WiFi frequency, band and channel width tuning is an important task in any wireless network. If we fail to setup WiFi frequency and channel width parameter properly, we will notice a poor performance of wireless network. WiFi is aimed at use within unlicensed spectrum and the unlicensed spectrum that is usually used for WiFi is 2.4 GHz and 5 GHz band. 2.4 GHz and 5 GHz bands have multiple channels and these channels must be setup properly to get [...]
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MikroTik DHCP Server Configuration in RouterOS 7 | October 14, 2015
Dynamic Host Configuration Protocol (DHCP) is a client/server protocol. DHCP server automatically provides an Internet Protocol (IP) address and other related information such as subnet mask, default gateway and DNS to DHCP clients. DHCP server and client use UDP port 67 and 68 for communication. In a network, a DHCP client (IP devices such as Desktop, Laptop, Smartphone etc.) requests for an IP lease to DHCP servers and a DHCP server responses allocating IP address and other related IP information [...]
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System Restore in Windows 10 | August 30, 2015
Windows is the most popular operating system in the world. No computer user can go a single day without windows operating system. As windows is a popular and mostly used operating system, a lot of viruses or unwanted programs are creating everyday. So, you may face various unusual behavior in your windows operating system due to various virus attack or unwanted programs installation. But windows has integrated a lot features which help to prevent these unwanted programs and keep your [...]
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Unlocking Digital Opportunities: A Beginner’s Guide to Computer Networking | October 14, 2025
Summary Computer networking has created the digital world, enabling communication networks that unite various regions of the world and connect any device in some way or another. Networking provides new opportunities to secure employment, act as freelance workers, or even pursue volunteer work, which is why it is worth investing in for career development. Being practical should be valued even more than theory. Even after setting up a home lab, reviewing real projects, and consulting trusted sources, you will learn [...]
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How to Create Free SSL/TLS Certificate with OpenSSL | July 23, 2021
SSL/TLS certificate is required to encrypt data sent over internet communication. Without encryption, the sent data can be hacked by the middle man attack. SSL/TLS certificate is usually a pair key, public key and private key, solution where data is encrypted with public key and decrypted with private key. In public communication, public key is required to be signed by a CA (certificate authority) but in private communication, there is no need to be signed by any CA. If we [...]
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Hard Disk Partitioning in Windows 7, 8 & 10 | August 26, 2015
Windows is the most popular operating system in the world. Any computer user cannot go a single day without windows operating system. Even, I am writing this article on a windows operating system and you are also reading this article on any windows operating system, I think. Windows provides a lot of features or utilities for its user so that they can maintain their operating system so easily. Disk Management is such a built-in powerful utility in windows operating system which [...]
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MikroTik Firewall Basic Concept | October 6, 2017
MikroTik Firewall functions as a network security tool for preventing unauthorized access to networks as well as provides Network Address Translation functionality. So, a network administrator who is using MikroTik Router in his network cannot go a single day without MikroTik Firewall. Actually, the main duty of a MikroTik administrator is to maintain Firewall properly along with Bandwidth management after completing MikroTik Router basic configuration. So, a MikroTik administrator should have enough knowledge on MikroTik Firewall and so this article [...]
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