Category: CentOS

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What Is /etc/hosts File and How To Create and Edit It?

New comers to the Linux generally asks for what is the purpose and usage of the /etc/hosts file. /etc  directory holds system and service related configuration. hosts file is used to store host name or DNS to IP address resolution. It provides easy way to match a host or DNS name with...

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How To Use vmstat To Monitor Linux Performance

Linux distributions provides a lot of tools in order to monitor system performance. vmstat is one of the most used tool for system performance monitoring. vmstat can collect and report information about memory, cpu, swap, io in a detailed way. In this tutorial we will examine the output of the vmstat and different...

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Linux Bash Case Statement with Examples

Bash provides an interactive shell and programming environment for its users. Programming environment have very reach features like loops for and while, selection if and case. In this tutorial we will examine the case mechanism in detail. Syntax Syntax of case statement is a bit different and complex then if and other conditional...

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What Is Default SFTP Port and How To Change SFTP Port Number?

SFTP is secure version of the FTP . SFTP provides encrypted channel with the remote server. This makes authentication and data transfer more secure than FTP. SFTP protocol is generally provided by SSH servers by default. In this tutorial we will learn the default SFTP port and how to change...

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Vim Editor Commands Cheat-sheet

vim or vi is very powerful text editor used in Linux systems. As they provide a lot of features and used from command line they have a lot of commands and shortcuts. In this page we will list these commands as a cheat-sheet. We will look most used command and shortcuts in...

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What Is init.d and How To Use For Service Management In Linux

Linux operating systems generally uses boot loader like grub and lilo and than uses init process to start operating system and other services.init is the most important process which forks or creates other process in a Linux system. init.d is init  configuration directory which holds information about the services or daemons. init.d Location init.d is located...

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How To Unmount Disk in Linux, Ubuntu, CentOS with umount Command

Linux distributions like Ubuntu, Debian, CentOS, RHEL and others uses disks by mounting them to the file system. We have all ready examined mount command in the following tutorial. In this tutorial we will learn how to umount the disk in a Linux system. Linux Mount Command Tutorial With Examples Before...

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How To Download and Upload Directories Recursively In Linux

scp is popular protocol and command used to download and upload files and directories in a secure manner. We have all ready examined most of the scp command features in the following tutorial. In this tutorial we will learn hoe to copy directories or folders recursively with scp . Linux Scp Command Usage...

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How To Find And Change SSH Port Number?

ssh  is default protocol used to manage remote systems which are mainly Linux and Network Devices. As it is working over network connection and uses TCP it has a default port number which is 22  . In this tutorial we will look how to change the default port number from...

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