Knowledge Base
427 articles and guides on knowledge base from the NexonHost team — page 17 of 18.
How to understand KVM (KERNEL VIRTUAL MACHINE)
How To Understand KVM (KERNEL VIRTUAL MACHINE) KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, KVM.ko, that provides the core virtualization…
Read article →How to understand virtualization environments.
How To Understand Virtualization Environments. Server virtualization is the process of dividing a physical server (computer) into multiple unique and isolated virtual machines (VMs) by means of a software application. To put it simply, this is a box with various storage sections. A server divided…
Read article →How to create RAID 10 or 1+0 (nested)
How To Create RAID 10 Or 1+0 (Nested) RAID 10 is a combine of RAID 0 and RAID 1 to form a RAID 10. To setup Raid 10, we need at least 4 number of disks. In our earlier articles, we’ve seen how to setup a RAID 0 and RAID 1 with minimum 2 number…
Read article →How to create RAID 6 (Striping with Double Distributed Parity)
How To Create RAID 6 (Striping With Double Distributed Parity) On Linux based operating system (OS), software RAID functionality is provided with the help of the md(4) (Multiple Device) driver and managed by the mdadm(8) utility. “md” and “mdadm” in RHEL 6 support RAID levels 0, 1, 4, 5, 6, and 10.
Read article →How to create RAID 5 (Striping with Distributed Parity)
How To Create RAID 5 (Striping With Distributed Parity) Redundant Array of Independent Disks Mode 5 (Redundant Array of Independent Disks Mode 5) A popular disk or solid state drive (SSD) subsystem that increases safety by computing parity data and increasing speed by interleaving data across…
Read article →How to create RAID 1 (mirroring)
How To Create RAID 1 (Mirroring) RAID 1 is a hard disk configuration where the contents from one hard disk are mirrored onto another. This provides the user with some redundancy in case a disk fails. On your Linux system, the two hard drives are represented as a single file system. About RAID 1,…
Read article →How to create RAID 0 (disk striping)
How To Create RAID 0 (Disk Striping) RAID 0 (disk striping) is the process of dividing a body of data into blocks and spreading the data blocks across multiple storage devices, such as hard disks or solid-state drives (SSD), in a redundant array of independent disks (RAID) group. About RAID-0…
Read article →How to understand RAID, RAID Level 0, 1 and RAID concepts.
How To Understand RAID, RAID Level 0, 1 And RAID Concepts. RAID (redundant array of independent disks) is a way of storing the same data in different places on multiple hard disks or solid-state drives (SSDs) to protect data in the case of a drive failure. There are different RAID levels, however,…
Read article →How to use SSH command.
How To Use SSH Command. This article explains how to use the OpenSSH command-line client (ssh) to login to a remote machine and run commands or perform other operations. Secure Shell (SSH) is a cryptographic network protocol used for an encrypted connection between a client and a server. The ssh…
Read article →How To Create a Sudo User on Ubuntu
How To Create a Sudo User on Ubuntu The sudo command is designed to allow users to run programs with the security privileges of another user, by default the root user. In this guide, we will show you how to create a new user with sudo access on Ubuntu systems. You can then use this…
Read article →How to Install Gitea on Ubuntu 20.04
How to Install Gitea on Ubuntu 20.04 Gitea is a fast and easy-to-use self-hosted git server written in Go. It includes a repository file editor, project issue tracking, user management, notifications, built-in wiki, and much more. This article explains how to install and configure Gitea on Ubuntu…
Read article →Install ONLYOFFICE Docs on Ubuntu 20.04
Install ONLYOFFICE Docs on Ubuntu 20.04 ONLYOFFICE Docs is an open-source office suite distributed under the AGPLv3 license. It allows working with office documents, spreadsheets,and presentations, as well as with fillable forms, which you can save as PDF files. The suite uses DOCX, XLSX, and PPTX…
Read article →How to Install Docker on Ubuntu 20.04
How to Install Docker on Ubuntu 20.04 Docker is an open-source containerization platform that allows you to quickly build, test, and deploy applications as portable containers that can run virtually anywhere. A container represents a runtime for a single application and includes everything the…
Read article →How to Install Odoo 15 on Ubuntu 20.04
How to Install Odoo 15 on Ubuntu 20.04 Odoo is a popular open-source suite of business apps that help companies to manage and run their business. It includes a wide range of applications such as CRM, e-Commerce, website builder, billing, accounting, manufacturing, warehouse, project management,…
Read article →How to Install Let’s Encrypt with Apache on CentOS 7
How to Install Let’s Encrypt with Apache on CentOS 7 In this tutorial, we will show you how to install the Let’s Encrypt client on your CentOS 7 VPS and issue an SSL certificate for your domain. Improving your website security through SSL encryption can increase your visitors’ trust in your website.
Read article →How to Install Smartctl on Ubuntu 20.04 – Monitor the health of your hard disks
How to Install Smartctl on Ubuntu 20.04 – Monitor the health of your hard disks As mentioned above, the smartctl command belongs to the smartmontools utilities that we can install from the official repositories of Ubuntu 20.04. To achieve this, open a terminal or SSH session. Then, you can update…
Read article →How to use WinMTR
How to use WinMTR Windows For a simple diagnostic of the network connection to a remote host, just enter its IP address or domain name in the Host field, and then click Start. All parameters can be left at default. After that, you will see how WinMTR sends requests every second and which hosts…
Read article →How to Compress and Extract Files and Directories in Linux Using gzip and bzip2
How to Compress and Extract Files and Directories in Linux Using gzip and bzip2 The post explains provides basic commands to compress files and folders in Linux OS. To compress a file or folder, gzip and bzip2 are two very popular tools. Gzip Compression To compress a file: # gzip file1 A file by…
Read article →How to Zip Files and Directories in Linux
How to Zip Files and Directories in Linux Zip is the most widely used archive file format that supports lossless data compression. A Zip file is a data container containing one or more compressed files or directories. Compressed (zipped) files take up less disk space and can be transferred from…
Read article →How to archive and extract files/directories using “tar” in Linux
How to archive and extract files/directories using “tar” in Linux Archiving and compressing files are useful when creating backups and transferring data across a network. One of the oldest and most common commands for creating and working with backup archives is the tar command. With tar, users can…
Read article →CentOS 8 : upgrade to latest linux kernel
CentOS 8 : upgrade to latest linux kernel Update CentOS 8 Software Packages: Connect with centos-8.centlinux.com server as root user by using a SSH tool. Upgrade existing software packages in CentOS 8 machine by using the dnf command. [root@centos-8 ~]# dnf update -y Last metadata expiration…
Read article →CentOS 7 : how to update kernel
CentOS 7 : how to update kernel Introduction The Linux kernel is the foundation on which all Linux distributions operate. It is open-source software – anyone can decompile, examine, and modify the code. Updated versions of the kernel can improve security, add functionality, and improve the speed…
Read article →How to Install PowerDNS and Poweradmin on CentOS 7
How to Install PowerDNS and Poweradmin on CentOS 7 Step 1 – Install EPEL and Remi Repositories First of all, we need to install dependencies for the PowerDNS installation. We’re going to install the EPEL repository and the REMI for PHP 7.2 installation. Install EPEL and PHP Remi repository using…
Read article →How to use the MTR command on Linux
How to use the MTR command on Linux MTR (Matt’s traceroute) is a program with a command-line interface that serves for network diagnostic and troubleshooting. The advantage of this software is that it combines the functionality of the Ping command and the Traceroute. Just like a typical traceroute…
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