Knowledge Base
427 articles and guides on knowledge base from the NexonHost team — page 13 of 18.
How to use Type command.
How To Use Type Command. In this article, we will explain how to use the Linux type command. The type command is used to display information about the command type. It will show you how a given command would be interpreted if typed on the command line. How to Use the type Command type…
Read article →How to use nohup command.
How To Use Nhup Command. The nohup command executes another program specified as its argument and ignores all SIGHUP (hangup) signals. SIGHUP is a signal that is sent to a process when its controlling terminal is closed. Usually, when you run a program over SSH, if your connection drops or you log…
Read article →How To Set Up Time Synchronization on Ubuntu 20.04
How To Set Up Time Synchronization On Ubuntu 20.04 Accurate timekeeping is integral to modern software deployments. Without it, you may encounter data corruption, errors, and other issues that are difficult to debug. Time synchronization can help ensure your logs are being recorded in the correct…
Read article →How to start/enable timesyncd on Ubuntu 20.04 LTS
How To Start/Enable Timesyncd On Ubuntu 20.04 LTS The systemctl command is used to manage system services on Ubuntu 20. One of the services it can manage is the systemd-timesyncd service, which is responsible for synchronizing the system clock. The status option is used to display the current…
Read article →How to Save a File in Vim / Vi and Quit the Editor
How To Save A File In Vim / Vi And Quit The Editor This guide explains how to save a file in Vim / Vi and quit the editor. Vim is the text editor of choice for many users that spend a lot of time on the command line. Unlike other editors, Vim has several…
Read article →How to understand Sudo Command.
How To Understand Sudo Command. In this tutorial, we will explain how to use the sudo command. Using sudo instead of login in as root is more secure because you can grant limited administrative privileges to individual users without them knowing the root password The sudo command allows you to run…
Read article →How to use Bash Source Command.
How To Use Bash Source Command. The source command reads and executes commands from the file specified as its argument in the current shell environment. It is useful to load functions, variables, and configuration files into shell scripts. Source is a shell built-in in Bash and other popular…
Read article →How to use Free Command.
How To Use Free Command. The free command provides information about the total amount of the physical and swap memory, as well as the free and used memory. In Linux systems, you can use the free command to get a detailed report on the system’s memory usage. How much free RAM memory do I have…
Read article →How to Install and Configure an NFS Server on Ubuntu 18.04
How To Install And Configure An NFS Server On Ubuntu 18. In this tutorial, we’ll go over how to set up an NFSv4 Server on Ubuntu 18.04. We’ll also show you how to mount an NFS file system on the client. NFS protocol is not encrypted by default and unlike Samba , it does not…
Read article →How to use tr command.
How To Use Tr Command. In this tutorial, we will show you how to use the tr command through practical examples and detailed explanations of the most common options. tr is a command-line utility in Linux and Unix systems that translates, deletes, and squeezes characters from the standard input and…
Read article →How to Run Sudo Command Without Password
How To Run Sudo Command Without Password The sudo command allows trusted users to run programs as another user, by default the root user. If you spend a lot of time on the command line, sudo is one of the commands you will use on a frequent basis. Usually, to grant sudo access to a…
Read article →How to use less command
How To Use Less Command Less is a command line utility that displays the contents of a file or a command output, one page at a time. It is similar to more, but has more advanced features and allows you to navigate both forward and backward through the file. When starting less doesn’t read the…
Read article →How to use unmask command.
How To Use Unmask Command. It is used by mkdir, touch, tee , and other commands that create new files and directories. On Linux and Unix operating systems, all new files are created with a default set of permissions. The umask utility allows you to view or to set the file mode creation mask, which…
Read article →How to Check if a String Contains a Substring in Bash
How To Check If A String Contains A Substring In Bash In this article, we will show you several ways to check if a string contains a substring. One of the most common operations when working with strings in Bash is to determine whether or not a string contains another string. Using Wildcards The…
Read article →How to Check for Open Ports
How To Check For Open Ports This article describes several approaches to find out what ports are opened to the outside on your Linux system. Whether you are troubleshooting network connectivity issues or configuring a firewall, one of the first things to check is what ports are actually opened on…
Read article →How to Check the Kernel Version in Linux
How To Check The Kernel Version In Linux In this tutorial, we’ll show you several different ways to find out what version of Linux kernel is running on your system. The kernel is the core component of an operating system. It manages the system’s resources, and it is a bridge between your…
Read article →How to understand what is a kernel
How To Understand What Is A Kernel The kernel is a core component of an operating system and serves as the main interface between the computer’s physical hardware and the processes running on it. The kernel enables multiple applications to share hardware resources by providing access to CPU,…
Read article →How to understand Bash Shebang.
How To Understand Bash Shebang. If you are learning Bash scripting by reading other people’s code you might have noticed that the first line in the scripts starts with the #! characters and the path to the Bash interpreter. This sequence of characters (#!) is called shebang and is used to tell the…
Read article →How to Add a Directory to PATH in Linux
How To Add A Directory To PATH In Linux This article shows how to add directories to your $PATH in Linux systems. When you type a command on the command line, you’re basically telling the shell to run an executable file with the given name. In Linux, these executable programs like ls , find ,…
Read article →How to use ps command.
How To Use Ps Command. This article explains how to use the ps command to list the currently running processes and display information about those processes. In Linux, a running instance of a program is called process. Occasionally, when working on a Linux machine, you may need to find out what…
Read article →How to understand OSI.
OSI Model OSI stands for Open System Interconnection is a reference model that describes how information from a software application in one computer moves through a physical medium to the software application in another computer. OSI consists of seven layers, and each layer performs a particular…
Read article →How to understand TCP/IP protocol.
What is TCP? Transmission Control Protocol (TCP) is a communications standard that enables application programs and computing devices to exchange messages over a network. It is designed to send packets across the internet and ensure the successful delivery of data and messages over networks. TCP…
Read article →How to use Locate Command.
How To Use Locate Command. In this article, we will explain how to use the locate command. One of the most common operations when working on Linux is to search for files and directories. There are several commands on Linux systems that allow you to search for files, with find and locate being the…
Read article →how to use cp command.
How To Use Cp Command. In this article, we will explain how to use the cp command. When working on Linux and Unix systems, copying files and directories is one of the most common tasks you’ll perform on a daily basis. cp is a command-line utility for copying files and directories on Unix and Linux…
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