Is it possible to quit Google?

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How to convert flv to mp3 in Ubuntu

FFmpeg from the repository is not compiled to support restricted formats such as mp3. You can use a third-party repository such as Medibuntu, compile ffmpeg yourself, or use another library, such as: libavcodec-extra-53.

The basic command:

Code:

ffmpeg -i inpuvvideofile.flv outputaudiofile.mp3

By default this will create a 64 kb/s file. You can declare the audio bitrate with -ab:

Code:

ffmpeg -i inpuvvideofile.flv -ab 128k outputaudiofile.mp3

If the flv already has mp3 audio, then there is no need to re-encode. You can just copy the audio stream. This will preserve the audio quality and will be much quicker since there is no re-encoding:

Code:

ffmpeg -i inpuvvideofile.flv -acodec copy outputaudiofile.mp3

Don't know what the audio is? Just ask ffmpeg:

Code:

ffmpeg -i inputvideo.flv

Along with some other information, ffmpeg will provide file details with the above command:

Code:

Stream #0.0: Video: flv, yuv420p, 320x240, 29.97 tb(r)
Stream #0.1: Audio: mp3, 22050 Hz, mono, s16, 56 kb/s

Source:ubuntuforums

64 bit ও 32 bit লিনাক্সে Avro keyboard ইন্সটল করার পদ্ধতি | Ubuntu Library

64 bit ও 32 bit লিনাক্সে Avro keyboard ইন্সটল করার পদ্ধতি | Ubuntu Library.

download-scim-avro.tar.gz 

built instruction from avro

grub2 - Grub Error in Ubuntu 12.04 after upgrade from 11.10

Boot into the Ubuntu Live Cd and open terminal.



1. Identify Ubuntu partition:

sudo fdisk -l

2. Mount it ( replace sda1 with the Ubuntu partition number):

sudo mount /dev/sda1 /mnt

3.Reinstall grub:

sudo grub-install --root-directory=/mnt /dev/sda
sudo update-grub

Solution from: grub2 - Ubuntu 11.10 not showing up in GRUB bootloader after update and restart :( - Ask Ubuntu.

What are Unity's keyboard and mouse shortcuts? - Ubuntu 12.04

What are Unity's keyboard and mouse shortcuts? - Ask Ubuntu.

Show All Running Processes in Linux

Show All Running Processes in Linux.

Subversion Commands

Subversion Complete Reference.

Installing Oracle-JDK in Ubuntu

Download JDK from ORacle. Run Terminal:

chmod u+x jdk-6u31-linux-i586.bin
./jdk-6u31-linux-i586.bin
sudo mv jdk1.6.0_31 /usr/lib/jvm/

#Next line will add java to symlink

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.6.0_31/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.6.0_31/bin/javac" 1

Or, better if you can set environment variable by adding the following lines at the bottom of .bashrc by "gedit ~/.bashrc":

export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_03
export PATH=$PATH:$JAVA_HOME/bin

You can now check if the java is installed properly in terminal:

java -version
javac -version

These will return the version of java and javac.

Ubuntu Command Collection

• install debian file:

sudo dpkg -i package_name.deb

• install dependency:

sudo apt-get -f install

• install software:

sudo apt-get -f install package_name

• install bundle file:

sudo sh file_name.bundle

• install bin/sh file:

chmod +x file_name.bin
./file_name.bin

• Installing WIRESHARK's dumpcap without allowing non-root users to capture packets:

setcap 'CAP_NET_RAW+eip CAP_NET_ADMIN+eip' /usr/bin/dumpcap

• Find the MAC address:

ifconfig

References:

1. WIRESHARK:

Generics are not supported in -source 1.3 error in Maven Project

When compiling via maven project, you may have encountered following error:

generics are not supported in -source 1.3 error in Maven Project. use -source 5 or higher to enable generics.

Annotation is not allowed in -source 1.3 use -source 5 or higher to enable annotation.

To solve this you must add the below lines at your pom.xml :

    
        
            org.apache.maven.plugins
            maven-compiler-plugin
            
                1.5</source>
                1.5