Vishnu Prasad

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Content Idea Generator

• Don't capitalize keywords (except proper nouns)<br>• Use the singular version of your keyword<br>• Revise the result to create your own fantastic (grammatically …

DigitalOcean home

Introduction<p>The cloud-init program that is available on recent distributions (only Ubuntu 14.04 and CentOS 7 at the time of this writing) is able to …

Linux

Ruby Version Manager

∞Installing RVM<p>RVM supports most UNIX like systems and Windows (with Cygwin or Bash on Ubuntu on Windows). The basic requirements are bash, curl, …

Linux

server

chef-server-ctl (executable)¶<p>The Chef server includes a command-line utility named chef-server-ctl. This command-line tool is used to start and stop …

How To Set Up a Firewall Using FirewallD on CentOS 7

IntroductionFirewalld is a complete firewall solution available by default on CentOS 7 servers. In this guide, we will cover how to set up a firewall …

Linux

How to Attach and Mount an EBS volume to EC2 Linux Instance

AWS allows you to create new EBS volumes and you can attach it to instances for extra storage. However, to make it usable as a storage inside the …

Linux

25 Hardening Security Tips for Linux Servers

Everybody says that <b>Linux</b> is secure by default and agreed to some extend (It’s debatable topics). However, Linux has in-built security model in place …

Linux

Linux Package Management

Updated Thursday, February 23, 2017 by Linode Written by Linode<p><b>Contribute on GitHub</b><p>Many tutorials reference “package managers” and “package …

Full Setup of Wordpress On Amazon EC2 Amazon Linux AMI - Amazon Web Services

In this tutorial we will be taking you through the full setup of installing a WordPress install on a Amazon Web Services EC2 AMI using a FREE …

Install and Configure Varnish with Apache on CentOS 7

Beginner<p>Table of Contents<p>Introduction<p>Varnish is an open source reverse HTTP proxy, an HTTP accelerator, and a useful tool for speeding up an Apache …

ElasticSearch Cluster: Configuration & Best Practices

ElasticSearch

Understand JavaScript Callback Functions and Use Them

(Learn JavaScript Higher-order Functions, aka Callback Functions)<p>In JavaScript, functions are first-class objects; that is, functions are of the type</i> …

The Complete Guide to the ELK Stack - 2018

With millions of downloads for its various components since first being introduced, the <b>ELK Stack</b> is the world’s most popular log management platform. …

Databases

This tiny little device lets you create your own personal cloud network in seconds

The Lima Smart & Private Cloud Storage Device is a tiny little device that fits in the palm of your hand, but don’t let its cute design fool you: …

Tech Trends

RAID Part-2

<b>Continue......</b><p># mdadm –detail /dev/md0 - to see the raid device details<p># mdadm /dev/md0 --fail /dev/sdb3 - to do manual failure of disk<p>To see the …

RAID Part-1

<b>Redundant array of independent disk</b><p>RAID (originally redundant array of inexpensive disks; now commonly redundant array of independent disks) is a …

Redhat Package Manager

Home<p>RPM is a powerful software manager. It can install, remove, query, and verify the software on your system. Setup of applications is called as …

Disk Quota Management

Disk Quota Management<p>Disk quotas are commonly used by ISPs, by Web hosting companies, on FTP sites, and on corporate file servers to ensure continued …

Logical Volume Management (LVM) Part-2

<b>Continuation......</b> of Logical Volume Management.<p><b>Command options:</b><p>lvchange Change the attributes of logical volume(s)<p>lvconvert Change logical volume …

Logical Volume Managar (LVM) Part-1

Logical Volume Manager<p>LVM is a logical volume manager for the Linux kernel that manages disk drives and similar mass-storage devices. Using logical …

File System

A file system is the underlying structure a computer uses to organize data on a hard disk. If you are installing a new hard disk, you need to …

what is crontab and how to use crontab in Linux / Unix

The crontab is a list of commands that you want to run on a regular schedule, and also the name of the command used to manage that list. Crontab …

Linux

Search related commands

Search commands will help you to search files/directories and file content.<p><b>Command GREP</b><p>Grand regular expression, it is used to search the file name …

File Links

<b>File Types</b><p>-b - block device file Example: HDD and pen drive<p>-d - directory file<p>- - common file<p>c - Character device file Example: terminal<p>l - Linked …

POSIX Access Control List ACL Linux / Unix

<b>POSIX Access Control List ACL :</b> To manage file security using <b>POSIX</b> (Portable Operating System Interface) access control list ( ACL ).<p>ACLs allows to …

Linux

String Related Commands

String related commands will help you to print/search file text as required<p><b>HEAD</b><b>:</b> Head prints the first N number of data of the given input. By …

How to Run or Repeat a Linux Command Every X Seconds Forever

A system administrator often needs to run a command repeatedly in a certain periods of time. Often such tasks can be easily completed with simple …

Linux

Netdata – A Real-Time Performance Monitoring Tool for Linux Systems

netdata is a extremely optimized Linux utility that provides real-time (per second) performance monitoring for Linux systems, applications, SNMP …

Linux