Spark 2.7.5 Installation issues on Ubuntu and fedora

I have followed below given steps but still i am not able to find spark on my system…

Checking JAVA Version

$ java -version

java version “1.7.0_95”

OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.15.10.1)

OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)

Download Spark Archive file

$ sudo wget http://download.igniterealtime.org/spark/spark_2_7_5.tar.gz

Extract Spark Archive file

$ sudo tar -zxvf spark_2_7_5.tar.gz

Download Spark Icon

$ sudo wget https://dl.dropbox.com/u/50880014/spark.png

Prerequiest library

$ sudo apt-get install libxtst6:i386 libxi6:i386

$ sudo nano /usr/share/applications/spark.desktop

[Desktop Entry]

Name=Spark

Version=2.7.5

GenericName=Spark

X-GNOME-FullName=Spark

Comment=ignite realtime Spark IM client

Type=Application

Categories=Application;Utility;

Path=/opt/Spark

Exec=/opt/Spark/Spark

Terminal=false

StartupNotify=true

Icon=/opt/Spark/spark.png

TargetEnvironment=Unity

Tar.gz package already has Java included, you don’t have to install one. You also don’t need to install that library on Ubuntu. Tar.gz already has everything it needs. To run it first time i do it in cmd: go to Spark folder and run command: ./Spark (if Spark is not set as executable, then first run: chmod +x Spark). Once it is running you can pin it to the left panel (if using Unity) and then you can run it by pressing its icon in the panel.

The dropbox link for the icone download is not working, this outside has to be arranged, please