Fix Error: libpci check failed. Disable KVM Device Assignment capability [Solved]
Question: I was stuck with an error “Error: libpci check failed. Disable KVM Device Assignment capability” while compiling qemu-kvm package...
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How to Install and Configure Puppet 4 on CentOS and Ubuntu? [Master and Agent]
Puppet, a popularly known configuration management tool for Unix and Windows based systems that allows an administrator to easily automate...Here’s everything you can do with Nmap – Command Examples
Nmap is an open source network mapper that allows one to scan network of hosts, services, perform security assessment and...How to Fix Package installation error – Unable to correct problems, you have held broken packages
Question: I was installing few OpenStack packages on Ubuntu 14.04.4 LTS and landed up with an error Unable to correct...How to Fix DROWN Vulnerability in Apache/NGINX Web server and SMTP?
Here’s a latest vulnerability called DROWN (Decrypting RSA with Obsolete and Weakened eNcryption) that aims to attack servers using weak...How to use libguestfs tools to Edit Virtual machine (VM) Disk Images in CentOS/RHEL/Fedora?
Question: By mistake I had disabled ‘root’ account in a CentOS Virtual machine running in VMWare. Thereafter, I tried all...How to Extract Audio from YouTube Videos and Save it as mp3, wav using youtube-dl command-line tool in Linux?
This tutorial will guide you to install a simple command-line utility called youtube-dl that allows you to extract audio from...How to Compile and Install FFmpeg from source in CentOS/RHEL?
I got an ERROR: ffprobe or avprobe not found while installing youtube-dl command-line utility on CentOS. This tutorial will show you on...How to Install or Update autoconf and automake on RHEL/CentOS?
Question: I was installing ffmpeg with Yasm support, during which I need to use autoconf to generate configuration script on...[Linux]: Diagnose Network Issues using MTR – better than traceroute!
Monitoring network connectivity is an important part of server administration. Few tools like ping, traceroute are simple to use and provides valuable...How to Install Multiple Versions of Python (2.7 and 3.5) Without breaking System tools and Create Isolated environment using Virtualenv?
Today, I’m going to tell you how to install Python 2.7 and 3.5 versions on CentOS 6.4. And we are...Error: md5 validation failed for PyYAML-3.11.zip possible download problem? [Solution]
Question: I was installing Packstack and was hit with an error “error: md5 validation failed for PyYAML-3.11.zip; possible download problem?“....Preug Command – SyntaxError: Missing parentheses in call to ‘print’ – Solution
Question: I get SyntaxError: Missing parentheses in call to ‘print’ when I invoke/execute ‘preupg‘ command on my CentOS machine. What...How to Disable LogWatch Email Reports in CentOS/RHEL/Fedora?
I have been using LogWatch on my CentOS box to monitor Kernel errors, mailbox usage, disk usage, refused SSH connections,...Dwarf Error: found dwarf version ‘4’, this reader only handles version 2 information [Solved]
I was trying to compile latest version of ‘tar‘ (version 1.28) from source. The ./configure script exited with an error...7 Ways to Detect Virtualization from your VM [Xen,VirtualBox,KVM,OpenStack with KVM]
At Techglimpse we frequently receive mails from our readers asking us to write a tutorial on ‘Virtualization Detection’ from a VPS or...How to Increase Maximum File Upload Size and allow PDF Uploads in MediaWiki
By default, MediaWiki allows user to upload jpg, png, ogg and tiff files that are up to 2MB in size. However, if...Fix OpenSSL Vulnerabilities on CentOS, Debian, Ubuntu and RHEL! [1.0.1e-fips]
If you find your production machines using OpenSSL version 1.0.1, 1.0.0 and 0.9.8, then here’s a serious vulnerability reported on...Sass installation, Compass setup, creating your first application and more
Css is sexy, and Sass is sexier. If you are a front-end developer, you should have heard about this acronym...