Tuesday, December 2, 2014

Installing rtl8723be driver for a working wifi

Hey All,

If you own one of those latest Laptops and especially from Lenovo, there are chances that you have Realtek Network controller....

To check the driver your laptop needs:

Issue the command: lspci and grep for Network
lspci | grep Network

If the above command output is:

02:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device b723

Then follow the below procedure of installation:

1. First download the file given in the below link:

2. Extract the zip file

3. cd rtl8723be

4. Inside the folder issue these commands:

-> make
-> sudo make install
-> sudo modprobe rtl8723be

5. Your wifi access points should be now visible for login/auto internet.

Thanks and hope this helps you - pitch in your comments.

Ananth S Gouri

Monday, December 1, 2014

Creating a screencast in Linux

Hey All....

This post explains how to create video tutorials or a screencast in Debian based distributions.

You have too many softwares on the OSS world. But this procedure seems to be the apt way of creation.

You require these to be installed before quickly going through this post:

1. audacity
2. avidemux
3. kazam

Install 1, 2 and 3 using synaptic package manager or with the commands

1. sudo apt-get install audacity
2. sudo apt-get install avidemux
3. sudo apt-get install kazam

Steps to follow:

1. Start kazam from the run mode: 

Disable both Sound from microphone and Sound from speakers
Next capture the full screen, or the window or the area you want to cover.

Save the file in your videos - rename the file from the default kazam system.date timing nomenclature.

2. Simultaneously start audacity and speak along while the video recording / screen recording is taking place. Save your file as mp3.

[Connect your mic and make sure your mic settings are selected in the dropdown of the audacity. ]

How to create a clear Audio file?

You need a good mic first. No matter the quality - there seems to be many a times noises like hiss, buzz or background noises.

To remove these noise:

Copy the original mp3 - duplicate it to not to lose the original file.

Copy the noise part of your audio and select Effect -> Noise Removal tool: from the top pane of audacity and click the button - Get Noise Profile

Then again Ctrl + A to the whole audio clip and again select Effect -> Noise Removal -> and click ok.

Save the new file next to your video file.

3. Last part is to blend both into 1 single piece.

This is where avidemux comes into picture.

1. Open the video first as input
2. Next open the audio in mp3 format as output
3. Save the project as either avi / mpeg format

That's it ! Go test your video !

Let me know your thoughts about screencast creation!

Ananth S Gouri

Installing Knoppix on a VM

Hey All..

Download Knoppix by Klaus Knopper at knoppix.net for a price or for free at knoppix.org

Knoppix is a Live CD with loads of software in it.

Burn the iso image downloaded to a DVD/CD appropriately.

Install Virtualbox / VMWare player for your Linux / Windows distributions.

Virtualbox can be found for your OS at virtualbox.org

Now... What is it there to install an OS onto a VM(virtual machine)? What is the specialty of it or the big deal in it?

Installing OSes on a VM will allow you to discover more types of distributions.

We learn a lot of things in the process of installation.

Now coming back... Why knoppix?

1. For me its one of the fav distributions of all times.
2. Its huge - consists of so many softwares in it..
3. Its interesting.

Select type of OS as Linux 2.6

Use the DVD burnt earlier or the iso image would do (run as live cd option)

Create a VDI file of around 32 GB min.

Now run the Live CD and allow the OS to load.

Once the OS is fully loaded...

Dont use the Knoppix flash installer tool present on the Desktop but use the menu -> traverse to Knoppix and Install Knoppix to HD software.

Create the file system using gparted tool, format the VDI to reiserfs filesystem.

Allow for the installation to complete..

Hope this was interesting. !

let me know if you face any challenges in between - I shall demonstrate this with snapshots!

Thanks, Tc,
Ananth The Geek!

You want to write a diary on Linux???

Hey All.... Its been a while since I am blogging...

But here you go... crisp and clear post...

If you want to keep a dairy - but as a software on Linux...

Here it is..

1. Lifeograph
2. rednotebook

The best 2 softwares I found interesting enough to keep you writing for a while. !

Installation is via synaptic for Debian based distributions.

Ubuntu has a ppa for both.

Let me know if you find difficulties in installing them, I shall let you know the procedure next time.

Ananth The Geek