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  • Access denied for user ‘root’@’localhost’ after installing MySQL [Fix]

    I Installed MySQL server (MariaDB 8.0) on my CentOS 7 using yum. Once started the service and when I tried...
  • Run multiple versions of PHP for different domains in NGNIX

    I recently purchased EduExpression WordPress plugin for a client to setup an examination software. I was able to install and...
  • How to Install phpize in Ubuntu?

    Question: I got an error phpize not found while installing PHP-SSH2 extension on Ubuntu. How to install phpize in Ubuntu?...
  • Fix Sub-Process /usr/bin/dpkg returned an error code(1)

    I encountered an error “Sub-Process /usr/bin/dpkg returned an error code (1)” while installing a Single sign-on package called Gluu Server....
  • Unrecognized VM option MaxMetaspaceSize=256m – oxd-server failed to start [Solution]

    Recently I have been trying my hands with SSO using OpenID connect single sign-on plugin by Gluu. One of the...
  • Uncaught Error Class ZipArchive not found – docxpresso plugin

    One of my client wanted to write tutorials containing lots of mathematical equations and formulas. By default, WordPress editor supports...
  • Can’t exec mysql_config: No such file or directory at Makefile.PL [Fix]

    If you are getting an error “Can’t exec mysql_config: No such file or directory at Makefile.PL”, then here’s how you...
  • Cannot find valid baseurl : YumRepo Error [Solved]

    This tutorial will explain how to fix yum repo error “Cannot find valid baseurl”, while executing yum install or yum...
  • Createuser could not connect to database postgres [Fix]

    Here’s a question from one of our regular reader Sam. He says that PostgreSQL does not allow to create user...
  • Fix fatal error openssl err.h – No such file or directory [OpenCA]

    I have been installing OpenCA version 1.5.1 on CentOS 7 machine. According to the documentation, I need to install OpenCA...
  • Fix NGINX 403 forbidden error after changing Root directory

    Installed Nginx and PHP-FPM for processing PHP files on CentOS server. To my surprise when accessed PHP files through browser,...
  • What is the current runlevel of Linux system?

    These days Linux systems comes with beautiful graphical interfaces as compared to earlier terminals that are text-mode interfaces. So, Linux...
  • Perl error: PERL XML-Parser module requires expat-devel

    I recently fixed an error “addMessage failed for log slot XML” while accessing OpenCA pub page. However that was an older...
  • How to install LEMP on Ubuntu 14.04 LTS

    LEMP is a group of open source software stack used to setup web server, database and PHP on a Linux...
  • How to Configure virt-manager for Nested Virtualization Support?

    Question: I have installed KVM hypervisor on my Debian Guest OS (basically a nested virtualization) which is hosted on a...
  • msfconsole error after updating Metasploit Framework in Kali Linux [Solved]

    Updating Metasploit is quite easy – you just need to run msfupdate command. Later, you might have to be prepared...
  • Issue: IP address in Ubuntu gets cleared automatically after sometime [Solution]

    Question: I have set an ip address for eth0 interface in Ubuntu and it worked for a while. But after...
  • How to Fix libpci header check failed. Disable KVM Device Assignment capability?

    Question: I got an error “libpci header check failed. Disable KVM Device Assignment capability” while compiling qemu-kvm package on Ubuntu...
  • How to Fix apt-get Failed to Fetch error in unsupported Ubuntu releases

    For one of my project, I need to install an older version of Ubuntu (11.10 oneiric release). But apt-get failed...
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