linux lvm commands

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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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    NGINX Web Server Installation and Configuration in Ubuntu |   September 7, 2024

    NGINX is a feature rich and high-performance software which is mainly used for Web Server. NGINX can also be used as a proxy server, load balancer, mail proxy and HTTP Cache Server. NGINX is a free and open-source software and can be run on Linux, Windows. macOS and other operating systems. NGINX is a single-thread based application. So, it can handle unlimited client requests using asynchronous technique. NGINX processes highly efficient run loops in a single-thread process called workers. Workers accept [...]

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    Ubuntu RADIUS Server Configuration with freeRADIUS |   September 3, 2022

    Ubuntu Server is one of most popular open-source Linux Server distribution. It is stable and reliable than other Linux distributions. So, enterprise level application can be hosted on Ubuntu Server. Ubuntu RADIUS Server is popularly used for remote authentication and mostly used with the freeRADIUS open source RAIDUS application. freeRADIUS is one of the most popular and powerful AAA (Authorization, Authentication and Accounting) application. Any enterprise (specially ISP company) can use freeRADIUS for AAA solution and can develop billing system. [...]

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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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    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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    CentOS 7 Partition Management with fdisk Utility |   February 11, 2019

    CentOS or Red Hat Linux is a popular server operating system to the system administrators. Almost all the system admins or IT guys who play with mail server, file server, proxy server and so on are so known with CentOS or Red Hat Linux and cannot go a single day without this operating system. The guys who are also wish to be a system admin should be familiar with CentOS or Red Hat operating system. In my previous article, I [...]

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    MikroTik UserMan RADIUS Server Customers, Users and Routers |   November 13, 2017

    MikroTik User Manager RADIUS Server is a centralized user authentication and accounting application that gives the ISP Company or network administrator ability to manage MikroTik RouterOS user, PPP user and Hotspot user so smoothly. There are two methods to install MikroTik User Manager RADIUS Server in your network. You can install User Manager Package either on a physical RouterOS or on a dedicated Server Machine or on a Personal Computer where RouterOS is running. How to install and configure User [...]

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    6 Best VPN Providers to Consider in 2022 |   October 19, 2021

    There are many VPN providers on the market. It can be difficult to know which one is best for you, but luckily we have compiled a list of six of the best! Get ready for our top picks. What is a VPN? A VPN, or virtual private network, hides and encodes your internet traffic so that you can surf the web more securely. By doing so, it protects your data from hackers and prying eyes. Think of a VPN as [...]

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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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    Block Internet Access at a Certain Time in MikroTik RouterOS |   August 1, 2024

    We often find how to block or allow internet access at a certain time in our LAN network specially in WiFi network. Time based internet access is so useful for controlling Kids internet in any family or managing stuff internet accessibility in any office or other network. MikroTik RouterOS offers a feature named Kid Control to block internet access at a certain time. This feature is so useful for the parents or network engineers who want to block internet access [...]

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