LinuxTechLab Blog

grep command with examples

Learn to use GREP command with examples

Grep is a very important & powerful Linux commands. It stands for ‘Global Regular Expression Print’ & is used for matching & printing a search pattern or a regular expression from a single or...

configure ldap

OpenLDAP: Complete guide to install & configure LDAP on CentOS/RHEL

OpenLDAP is an open source implementation of LDAP or Lightweight Directory Access Protocol . OpenLDAP allows to store store and organize user related data centrally. OpenLDAP functions like a relational database & can store...

changing default runlevel

Changing Default Runlevel in Centos/RHEL 6 & 7

Hello Linux-Fanatics, in this post we will be process for changing default runlevel in Centos\RHEL 6 & 7 . But before we do that, we must discuss following… What is a runlevel ? Runlevel...

rename user in linux

How to rename user in Linux (also rename group & home directory)

We might have come across a situation where we might want to rename user in Linux system, for whatever reasons. We can easily rename user in Linux & also we can rename the home...

Installing SKYPE on CentOS & RHEL 7

Recently Microsoft has pulled the plug on Skype version 4.10, which was the only version working on CentOS 6. Though we can install the latest version of skype on CentOS 7, RHEL 7 but...

squid tips & tricks

Some pretty useful SQUID tips & tricks

In our earlier tutorials regarding Squid proxy server, we have learned to install & configure squid proxy, setup ACLs ( Squid proxy installation & configuration, also discussed about squid with authentication & also configured...

secure grub

How to secure Grub in Centos/RHEL 5/6/7 & 7.2

Hello Linux-fanatics, in this tutorial we will learn to secure Grub. GRUB or Grand Unified Bootloader, is the default boot-loader for most of the Linux distributions. It provides a user the choice to boot one of...

zimbra mail on centos

Complete guide to install Zimbra Mail on CentOS & RHEL

Zimbra Collaboration Suite (ZCS) or commonly known as Zimbra Mail, is collaborative software suite that includes an email server and a web client. It also includes contacts, file sharing, calendar , tasks etc which...

install nvm

Install NVM: Maintain multiple NodeJS versions with Node Version Manager

We have earlier discussed How to install Node.js on Linux systems. In this tutorial, we will learn about NVM & process to install NVM. NVM stands for Node version manager & as you might...

install nodejs

How to install NodeJS on Linux (CentOS/Ubuntu)

Node.js or as commonly called NodeJS, is an open source , cross platform Java Run time environment based Chrome’s V8 JavaScript engine, meant for server-side programming. It allows us to run scripts on server-side...

installing VLC

Installing VLC & running it as root on CentOS/RHEL

Hello Linux-fanatics, every now & then we must have used our RHEL/CentOS machines to play some Videos. Some of the video formats work out of the box in the default video player, called “VIDEOS”...

change hostname

5 ways to add or change hostname in RHEL/CentOS 7

Hostname for a system is like an identity for that system, it not only makes system management easy but we can also use hostname to access a system over LAN. In this tutorial, we...

curl command with examples

Learn to use CURL command with examples

Curl command is used to transfer files to and from a server, it supports a number of protocols like HTTP, HTTPS, FTP, FTPS, IMAP, IMAPS, DICT, FILE, GOPHER, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP,...

install firefox quantum

How to install Firefox Quantum on Linux

Mozilla released Firefox 57 aka Firefox Quantum on 14th November, 2017, though it was in Beta for quite some time but a official release was provided. Firefox quantum is said to be the fastest...

utorrent on ubuntu

How to install UTorrent on Ubuntu Systems

Utorrent needs no introduction, it’s being used by thousands if not millions for sharing data all over the world. It uses BitTorrent protocol for sharing the data. Utorrent is available for Windows, Linux &...

Nagios monitoring using SSH

Easy guide to setup Nagios monitoring using SSH (check_by_ssh)

In our earlier tutorials, we have discussed how to install Nagios server & add Linux client for monitoring using NRPE plugin & also to add Windows clients for monitoring using NSClient++. But those are...