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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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How to Block WiFi Access although Password is Known | April 23, 2024
We usually get internet connection from any ISP and buy any WiFi Router and then configure wireless/AP with password and configure DHCP Server to get connection from own WiFi devices. We use these WiFi Routers/APs at home, office, workspace or any other public places. Usually, we get connected to our WiFi using our provided WiFi password. Initially there will be no problem to keep your network safe using password authentication. But day by day your password will be known by [...]
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Firewalld Installation and Configuration in Ubuntu Server | May 5, 2022
Firewalld is an awesome host based firewall management tool for Linux Operating System. Firewalld has developed on Fedora but it is now available for almost all Linux distributions. So, Firewalld can be installed in Ubuntu Server although Ubuntu Server has UFW as the default firewall system. Firewalld is more robust and easy to maintain than UFW, I think. So, I am going to discuss how to install and configure Firewalld in Ubuntu Server. Installing Firewalld in Ubuntu Server By default [...]
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MikroTik Hotspot HTTPS Redirect with Free SSL Certificate | June 21, 2020
SSL Certificate is required to enable HTTPS Login and HTTPS Redirect in MikroTik Hotspot. In one of my last articles I discussed how to configure MikroTik Hotspot HTTPS redirect and HTTPS login with MikroTik self-signed certificate. But self-signed certificate is not trusted by operating system. So, we get the following two issues if we configure HTTPS Login and HTTPS Redirect with self-signed certificate. Ask to proceed unsafe site: As browsers cannot trust self-signed certificate, it shows a warning message and [...]
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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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MikroTik RouterOS Device Mode: Home, Basic, and Advanced – and Their Impact on Hotspot Setup | November 4, 2025
MikroTik RouterOS offers flexible configuration options for everything from home routers to ISP-grade hotspots. When setting up your MikroTik device, you’ll see a Device Mode option in Quick Set — allowing you to choose between Home, Basic, or Advanced modes. These modes define how much control you have over the router’s features and directly affect your ability to create and manage a Hotspot network. In this guide, we’ll explain each mode, show you how to check and change device mode [...]
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Virtual Web Hosting with Apache on CentOS 7 (Name Based) | July 15, 2019
Virtual Hosting is a method of hosting multiple domains on single server. If you have multiple domains (such as domain1.com, domain2.com and so on) and want to host on a webserver, Virtual Web Hosting is your right choice. Apache web server provides an easy way to manage Virtual Hosting. Virtual Hosting can be either Name Based or IP Based. In Name Based Virtual Hosting, multiple domains can be hosted on single IP address. On the other hand, in IP Based [...]
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How to Assign Static IP Address in Windows OS | September 16, 2015
Communication between one computer to another computer or server is established with IP addresses. Without IP address no communication is possible in computer network. An Internet Protocol (IP) Address is a numerical value or label assigned to each electronic device (e.g., computer, smartphone and printer) which uses Internet Protocol for communication. IP can be assigned both dynamically and statically on a IP devices. Dynamic IP is assigned by a DHCP server. If a DHCP server is present in a network, [...]
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MikroTik Hotspot Auto Login by MAC Address | July 1, 2020
Hotspot is an awesome service in MikroTik Router. MikroTik Hotspot is popularly used in ISP, Hotel, Airport, Coffee Shop, Enterprise office and many other organizations. By default MikroTik Hotspot uses HTTP CHAP login method where user must provide username and password to get internet service. Sometimes we may face that some users are not eager to provide username and password to get internet service or we cannot ask some users to put username and password to get internet due to [...]
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Ubuntu Web Server Configuration with phpMyAdmin (LAMP Stack) | July 12, 2021
Ubuntu Server is one of the most popular open source operating systems that can be used in production without any hassle. In my previous article, I discussed how to install Ubuntu Server with LVM partition. I also discussed how to assign static IP address on Ubuntu Server interface with Netplan network management tool. Ubuntu web server is a popular service because web developers usually use Ubuntu Server for their development project. Besides development project, Ubuntu web server can also be [...]
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