du and df Command : Find Size of a directory & Free disk space in linux

Linux yum

Command: ‘du’ – Finding the size of a directory in linux $ du Typing the above at the prompt gives you a list of directories that exist in the current directory along with their sizes. The last line of the output gives you the total size of the current directory including its subdirectories. The size … Read more

adduser : Linux Command- Create New User account

add user in linux

What is adduser command? In Linux, a ‘useradd‘ command is a low-level utility that is used for adding/creating user accounts in Linux and other Unix-like operating systems. The ‘adduser‘ is much similar to useradd command, because it is just a symbolic link to it. To create a new user account under any Linux distribution use … Read more

rsync : File Synchronization and File Transfer program

rsync-backup tool

What is rsync command in Unix based system? – Rsync, which stands for “remote sync”, is a remote and local file synchronization tool. – It uses an algorithm that minimizes the amount of data copied by only moving the portions of files that have changed. – Rsync is a widely-used utility to keep copies of a … Read more

Load Balancing : Understanding Load Balancing

load_balancer

Why Load Balance is required? As the e-commerce industry continues to grow, more businesses rely on their Web sites to communicate with customers. A high-performance Web site that quickly and reliably delivers content gains and retains customers and is crucial to a successful and competitive e-business. Few potential customers will return to a frustratingly slow … Read more

ClearOS – Network Gateway and Network server : Introduction

clearos

ClearOS (formerly named ClarkConnect) is a Linux distribution, based on CentOS and Red Hat Enterprise Linux,. It is designed for use in small and medium enterprises as a network gateway and network server with a web-based administration interface. It is designed to be an alternative to Windows Small Business Server. ClearOS is a modular operating system … Read more

How to Install and Configure OpenSSH Server In Linux

ssh

Being a network administrator requires a deep knowledge about remote login protocols such as rlogin, telnet and ssh. The one I will discuss in this article is ssh, a secure remote protocol which is used to work remotely on other machines or transfer data between computers using SCP (Secure Copy) command. But, what is OpenSSH and how to install it in your Linux distribution? … Read more

RPM : What is RPM – Red-hat Package Manager

redhat

What is RPM: RPM Package Manager (also known simply as RPM), originally called the Red-hat Package Manager, is a program for installing, uninstalling, and managing software packages in Linux. RPM was developed on the basis of the Linux Standard Base (LSB). In latter-day usage, the “RPM” portion of this term arises from the fact that .rpm … Read more

YUM – What is yum

YUM (Yellowdog Updater Modified) is an open source command-line as well as graphical based package management tool for RPM (RedHat Package Manager) based Linux systems. It allows users and system administrator to easily install, update, remove or search software packages on a systems. yum can perform operations such as: installing packages deleting packages updating existing installed packages … Read more

How to get processer (CPU) details in Linux

cpuinfo

Use the command # cat /proc/cpuinfo  to see the processor details in linux. processor — Provides each processor with an identifying number. On systems that have one processor, only a 0 is present. cpu family — Authoritatively identifies the type of processor in the system. For an Intel-based system, place the number in front of “86” to determine the value. … Read more

The vi Editor

vi editor basic

No matter what work you do with the Unix/Linux system, you will eventually write some C programs or shell (or perl)  scripts. You may have also edit some of the system files at times. For all this you must learn to use an editor, and Unix provides a very versatile one — vi. Bill Joy … Read more