Author: Rahul

I, Rahul Kumar am the founder and chief editor of TecAdmin.net. I am a Red Hat Certified Engineer (RHCE) and working as an IT professional since 2009..

VLC is a free, open-source, and cross-platform multimedia player. It’s useful to play music and videos on the system. This article will help you to install VLC on Fedora Systems. This tutorial provides you two methods for installing VLC on Fedora systems. The first method will use the Snap package to install VLC and the second method will use the traditional way with rpm repositories for installing VLC on the Fedora system. Method 1 – Installing VLC on Fedora via Snap The Snapcraft is the latest way for installing Packages on Linux systems. It provides cross-platform applications to install on…

Read More

Hi Guys, This tutorial will help to for installing MySQL 5.6 on CentOS/RHEL system. I am using CentOS 6, 32 bit version. For other OS version you can download files from here. Also change the rpm names in all given commands in this tutorial. Step 1: Download RPMs from MySQL Download required rpm files from MySQL cdn network using following download links. # cd /opt/ # wget http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-server-5.6.15-1.el6.i686.rpm # wget http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-client-5.6.15-1.el6.i686.rpm # wget http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-shared-5.6.15-1.el6.i686.rpm Step 2: Install MysQL RPMs Install downloaded rpms using rpm command line tool. # rpm -ivh MySQL-server-5.6.15-1.el6.i686.rpm # rpm -ivh MySQL-client-5.6.15-1.el6.i686.rpm # rpm -ivh MySQL-shared-5.6.15-1.el6.i686.rpm Step…

Read More

This article will help to how to add SPF records for all accounts on cPanel server 1. For Single Account cPanel provides scripts to add SPF record in accounts. If you want to add SPF record in single account use following command as root user. # /usr/local/cpanel/bin/spf_installer <username> <username> : cPanel account name to which SPF need to configure. 2. For All Accounts Use following script to add SPF records for all accounts on cPanel server. # for USER in /var/cpanel/users/*; do /usr/local/cpanel/bin/spf_installer “${USER##*/}”; done Reference: http://docs.cpanel.net/twiki/bin/view/AllDocumentation/CpanelDocs/EmailAuthentication

Read More

The dd is an command which stands for “data duplicator”. This command is used for copying and converting data. The dd command simply copies standard input to standard output, read in 512-byte blocks. You can use the dd command to backup the entire hard disk or partition. Using dd command you can also backup the MBR. Go through this tutorial and understand the uses of dd command. #1 – Create Backup of Existing Partition The following command will create a backup of entire partition /dev/sdb1 and write to /backup/sdb1.img file. dd if=/dev/sdb1 of=/backup/sdb1.img Sample Output 16064937+0 records in 16064937+0 records…

Read More

SQLite is a lightweight SQL database that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. Except some of the commands, SQLite uses similar command syntax as used by MySQL, Oracle. This article will help to How to use SQLite database using the command line. 1. Create SQLite Database SQLite provides a simple command to create database. Use following command to create an sqlite database. sqlite3 tecadmin.db Basically SQLite database is a file that gets created in your currect working directory. ls -l tecadmin.db -rw-r–r–. 1 root root 3072 May 11 14:32 tecadmin.db 2. Create Tables in SQLite Database After…

Read More

Until today I was using the basic HAProxy settings, Today i found a task about selection of backend server basis of url request. While working on this task, I learned about HAProxy ACLs. Task: I have wordpress installed as http://domainname.com/blog . This domain is running from 2 back-end server and balanced by HAProxy, The task is to redirect all /blog request to only single server. Network Scenario for this setup HAProxy Server: 192.168.1.90 WEB1 : 192.168.1.103 WEB2 : 192.168.1.105 Domain: tecadmin.net The below example includes ACL for url_beg. url_beg matches the string used in url submitted. Using the url all…

Read More

Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local branching, convenient staging areas, and multiple workflows. This how to guide will help you to upgrade git version on your CentOS/RHEL 6 system. Step 1: Install rpmforge Repository Download and install rpmforge repository rpm using following commands. RHEL/CentOS 6 – 64bit # rpm -i ‘http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm’ #…

Read More

The DNS ( Domain Name System ) is a distributed system, used for transalate domain names to IP and vice a versa. This article will help you to How to Setup Master Slave DNS Server on CentOS 6 and RHEL Systems. Network Scenario for this Setup Master DNS Server IP: 192.168.1.90 ( ns1.tecadmin.net ) Slave DNS Server IP: 192.168.1.91 ( ns2.tecadmin.net ) Domain Name : demotecadmin.net ( For Testing Purpose ) Domain IP : 192.168.1.100 ( For Testing Purpose ) Step 1: Install Required RPMS ( at Master and Slave Both ) Install bind packages at both Master and Slave…

Read More

cPanel/WHM is a web-based control panel to manage complete Linux operating system. All the cPanel accounts are created using one primary domain. This article will help you to change documentroot for the primary domain of cPanel user. You must have root shell access for changing the main/primary domain document root in cPanel, Use following steps to change document root of your primary domain in cPanel account. Prerequisites You must have SSH access to root user to cPanel server. Step 1 – Update Document Root in cPanel Use SSH to get shell access for your server as root account, using your…

Read More

NGINX (Engine X) is a web server, Its getting popular very fast due to its fast speed. NGINX is also used as reverse proxy server. To use php script with nginx it required to install php-fpm. This article will help you To setup web hosting environment using Nginx, MySQL, PHP (LEMP) Stack with PHP-FPM on CentOS and RHEL 6 Server Step 1: Install Required RPM Repositories Fristly you would required to install EPEL and Remi repositories on your system. Use following commands to install repositories. # rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm # rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm If you are using another system version/architecture,…

Read More