Category: Articles

Learn | Teach Open Source Technologies

How to recover RPMDB in RHEL / CentOS / Fedora

You can see below is the error while updating RHEL/CentOS/Fedora using yum update [root@babar rpm]# yum update rpmdb: Thread/process 8367/457660786 failed: Thread died in Berkeley DB library error: db4 error(-41638) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery error: cannot open Packages index using db3 – (-30575) error: cannot open Packages database in /var/lib/rpm CRITICAL:yum.main:…
Read more

How to configure APACHE server with Self Signed Certificate on CentOS/ Red Hat Linux / Fedora

We need to follow below steps to configure APACHE with Self Signed certificate

Unable to Access WP-Admin because .htaccess not readable by APACHE user in LAMP

Unable to Access WP-Admin because .htaccess not readable by APACHE user in LAMP .htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable If you are unable to open portal please make sure you have corrected the permission of your files. To check the permissions of directory

WordPress has Launched Important Security release WordPress 3.8.2 for all WordPress based Websites around the Globe

According to this release will fix important issues: This release also fixes nine bugs and contains three other security hardening changes: Pass along additional information when processing pingbacks to help hosts identify potentially abusive requests. Fix a low-impact SQL injection by trusted users. Reported by Tom Adams of dxw. Prevent possible cross-domain scripting through Plupload, the…
Read more

LibreOffice an Open Source Office Productivity suite a very good alternative to Microsoft office Products

LibreOffice an Open Source Office Productivity suite a very good alternative to Microsoft office Products or any other propriety office productivity suites. LibreOffice is a office suite as famous Open Source Software being used widely for word processing. It  is a fork of  & developed by The Document Foundation in 2010. The LibreOffice suite is set of programs…
Read more

RapidSMS – Configure your own SMS Gateway on Linux

RapidSMS is a free and open-source framework for rapidly building mobile services for scale. RapidSMS is built with Python and Django and is designed for building robust, highly customized mobile services with web-based dashboards. RapidSMS provides a flexible platform and modular components for large-scale data collection, managing complex workflows, and automating data analysis. For more details: Installation: First…
Read more

Facebook is a big Advocate of Open Source Technologies, actively contributing source code to Open Source community

Facebook is a big advocate of Open Source Technologies,  always contribute to source code to Open Source Community from its big projects.  

Linux Find Out CPU Architecture Information

How do I find out my CPU architecture information under Linux operating systems? You can use /proc/cpuinfo file or use the lscpu command to get info about CPU architecture. It will display information like: Number of CPUs Threads Cores Sockets NUMA nodes

How to install RPM package in Linux

Linux Install an RPM File RPM is nothing but a a package management system. To install an rpm file, open a terminal and then type the following command: rpm -ivh .rpm.file-name


when we implement the REDHAT based servers, when we dont have the proper license we will be facing a lot of issues for installing the softwares. So to overcome the issue we need to setup the LOCAL REPOSITORY server. this  will eliminate the installation issues.Below i have explained how to setup the repo server step-by-step. SETTING…
Read more