Archive for ‘How To?’

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Extract Audio From Youtube HD MP4 Video Files

Extract Audio From Youtube HD MP4 Video Files

What if you want to get the audio file corresponding to one of the HD videos that you like on Youtube? It is very easy if you have a linux box to run a few simple commands. This post would also tell you how to convert an aac or m4a file to mp3. First...

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DIY Webcam Server or Home Security / Monitoring Setup Using BeagleBoard XM Running Ubuntu

DIY Webcam Server or Home Security / Monitoring Setup Using BeagleBoard XM Running Ubuntu

Earlier I showed how you can use a BeagleBoard XM as a home file server as well as a DLNA server using Ubuntu headless server. It is now time to extend the setup to include Home Security / Monitoring capability using a cheap webcam and a webcam server software. This tutorial is not restricted...

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Enable Workspaces / Multiple Desktops in Ubuntu 13.04

Enable Workspaces / Multiple Desktops in Ubuntu 13.04

Default installation of Ubuntu 13.04 has workspaces disabled or one is left with only a single desktop. If you want to enable it, here is what to do. Launch system settings and then open Appearance settings. Move to Behavior tab and check the Enable workspaces box and you have regular 2×2 workspace. Not too...

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Clone or Backup an SD / SDHC / Micro SDHC Card / Media on Linux

Clone or Backup an SD / SDHC / Micro SDHC Card / Media on Linux

I wanted to move my Raspbmc installation to a faster SDHC card for my Raspberry Pi, a complete reinstall would be silly, unless you have tons of time to waste. Easy way is cloning! Cloning is good way to backup bootable Micro SDHC or SDHC etc. cards (these cards are notorious at failing without...

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Fixed Grub error: “symbol not found: ‘grub_efi_secure_boot'”

Fixed Grub error: “symbol not found: ‘grub_efi_secure_boot'”

If you have an EFI bios boot enabled computer then updating Ubuntu would leave Grub with the following error: error: symbol not found: 'grub_efi_secure_boot'. error: symbol not found: 'grub_efi_secure_boot'. The solution to this error is identical to the original hack needed to enable dual boot. The issue is that Ubuntu update copies the updated...

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How to Install or Remove DEB Packages Using dpkg (Ubuntu / Debian)

How to Install or Remove DEB Packages Using dpkg (Ubuntu / Debian)

This post explains how to install, uninstall, verify deb packages on Debian or Ubuntu. dpkg is the command that allows one to install or uninstall a .deb package in Ubuntu or Debian Linux. Here is how to use it. Before we begin, it is important to note that you should use dpkg only in...

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Repair / Recover Crashed fat32 Drive/ File System Using fsck in Ubuntu

Repair / Recover Crashed fat32 Drive/ File System Using fsck in Ubuntu

If your fat32 formatted USB memory stick / hard drive is failing on you and not allowing you to access it. You can try repairing it to restore access by using free tool fsck available with most linux distros. Beware: fsck does not guarantee full recovery but is certainly expected to fix the disk...

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Install Apache MySQL PHP phpmyadmin (LAMP) on Linux Mint 13 Maya

Install Apache MySQL PHP phpmyadmin (LAMP) on Linux Mint 13 Maya

Installing Apache MySQL, PHP and phpmyadmin on Linux Mint 13 Maya is very easy. You start by installing a small utility called tasksel which does most of it for you. sudo apt-get install tasksel Now you caninstall Apache2, php, MySQL all in one shot using the following command: sudo tasksel install lamp-server After this...

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Viewport / Workspace Switching Using Mouse Wheel Ubuntu 12.04 Unity

Viewport / Workspace Switching Using Mouse Wheel Ubuntu 12.04 Unity

I love multi-tasking and Ubuntu 12.04 allows me to have my way with 4 (2×2) workspaces by default. However, old Gnome allowed one to change number of workspaces or viewports with ease. With new Unity in Ubuntu 12.04 Precise, one can achieve similar setup. One can have as many viewports as one wants and...

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Disable SELinux on Fedora 16 Verne

Disable SELinux on Fedora 16 Verne

You can disable SELinux in Fedora 16 Verne (which is more of an annoyance for several user) by editing the config file in /etc/selinux while being root (either you can use text editor of your choice or by using vi as described below) su vi /etc/selinux/config In vi to edit a file you first...

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Change Default Boot Order / Sequence for Grub2 in Fedora 16 Verne

Change Default Boot Order / Sequence for Grub2 in Fedora 16 Verne

Fedora finally took the leap to Grub2 with its latest release Fedora 16 Verne. So, if you want to change the boot order and default boot choice for your multiboot system this post tells you how you can do so. You no longer edit grub.conf or menu.lst files located in /boot/grub folder. Instead you...

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VirtualBox Guest Addition Installation Fedora 16 Verne

VirtualBox Guest Addition Installation Fedora 16 Verne

If you installed / virtualized Fedora 16 using VirtualBox then you need to install the following packages before installing the guest additions for Fedora 16 guest OS. Installation of guest additions is a must to get 3D video acceleration required to enable Gnome 3 that is shipped with Fedora Verne. 1. Install kernel headers...

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Dual Boot Windows 7 and Fedora 16 Verne (Step by Step Guide)

Dual Boot Windows 7 and Fedora 16  Verne (Step by Step Guide)

The Fedora Project recently released Fedora 16 (“Verne”), featuring GNOME 3.2, as well as virtualization and cloud enhancements including Aeolus and OpenStack integration. Fedora 16 upgrades to Linux 3.1, the GRUB2 bootloader finally shows up, and Firefox 7.0.1, while offering improved system settings, plus enhanced contact and document management apps. This installation guide is...

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Perfect Desktop Using Ubuntu 11.10 Oneiric Ocelot: Post Install Guide

Perfect Desktop Using Ubuntu 11.10 Oneiric Ocelot: Post Install Guide

Ubuntu 11.10 tries to address some of the issues associated with the Unity Desktop system. Oneiric Ocelot also witnesses Canonical’s shift to Thunderbird as the default email client. This guide focuses onĀ  the post install steps to ensure that you have the optimum PC experience with Ubuntu 11.10. Now that you have installed Ubuntu...

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Change Default Boot Order for Grub 2 in Ubuntu 11.10 Oneiric Ocelot

Change Default Boot Order for Grub 2 in Ubuntu 11.10 Oneiric Ocelot

Ubuntus 11.10 use Grub2. This post discusses the procedure to change the default boot choice for Grub for multi OS setting. If you want to make Windows to boot automatically by default, read on. With Grub 2 you can no longer edit grub.conf or menu.lst files located in /boot/grub folder. The file to be...

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Enable Restart X server (Ctrl-Alt-BackSpace) in Ubuntu 11.10 Oneiric Ocelot

Enable Restart X server (Ctrl-Alt-BackSpace) in Ubuntu 11.10 Oneiric Ocelot

Since Ubuntu 9.10, X server kill/restart option via Ctrl-Alt-Backspace is disabled by default, to enable it in Ubuntu 11.10 Oneric Ocelot, follow the following approach. Click on the Ubuntu icon at top left corner and search for text “keyboard”. Launch the keyboard layout icon (first in search result as shown below) Now on the...

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Dual Boot Windows 7 and Ubuntu 11.10 Oneiric Ocelot

Dual Boot Windows 7 and Ubuntu 11.10 Oneiric Ocelot

This is an installation guide to dual boot UbuntuĀ 11.10 Oneiric Ocelot with Windows 7 (would work for any version of Windows) and Ubuntu 11.10. Most users out there would have Windows 7 already installed on the only hard drive in the system. Desktop users might have multiple drives and typically prefer installing Ubuntu on...

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Find Version of GRUB Bootloader (Legacy or GRUB2) in Ubuntu / Linux

Find Version of GRUB Bootloader (Legacy or GRUB2) in Ubuntu / Linux

Planning on tweaking the settings of Grub bootloader on your machine, but you are not sure which version are you running? Yeah, it is very important to know, as commands are version specific and you may end up rendering your system unbootable if you run wrong commands. Well most recent versions of Ubuntu ship...

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Change Background Color for Emacs and Other Customizations

Change Background Color for Emacs and Other Customizations

If you like black background for emacs then you can do so by editing the .emacs file in your home (\home\username) directory. Just add the following lines in your .emacs file and save it to change the background color from black to white. gedit .emacs Now add these lines and save the file ;;to...

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Import Missing Launchpad PPA GPG Keys Automatically in Ubuntu

Import Missing Launchpad PPA GPG Keys Automatically in Ubuntu

Quite often when you add a PPA when the Ubuntu keyserver is down, the key is doesn’t get added. It can be quite annoying to search for and manually import the GPG keys for various PPAs. When you don’t have the appropriate GPG imported, in most cases you can’t update and when you run...

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