Install Spark IM client on Linux

Make sure you should install JAVA before proceeding Spark installation because it’s mandatory to run Spark.

# Checking JAVA Version #
$ java -version
java version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.14.04.1)
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_6.tar.gz

# Extract Spark Archive file #
$ sudo tar -zxvf spark_2_7_6.tar.gz
$ sudo mkdir /opt/spark
$ sudo mv Spark/.[!.]* /opt/spark/
# Download Spark Icon # 
$ sudo wget https://dl.dropbox.com/u/50880014/spark.png 
$ sudo mv spark.png /opt/spark/

# Prerequiest library # 
$ sudo apt-get install libxtst6:i386 libxi6:i386

# if you want to create a Ubuntu Unity Desktop Launcher, create a desktop launcher file with 
$ sudo gedit /usr/share/applications/spark.desktop
   
# Then add the following information and save :
[Desktop Entry]
Name=Spark
Version=2.6.3
GenericName=Spark
X-GNOME-FullName=Spark
Comment=ignite realtime Spark IM client
Type=Application
Categories=Application;Utility;
Path=/opt/spark
Exec=/bin/bash Spark
Terminal=false
StartupNotify=true
Icon=/opt/spark/spark.png
TargetEnvironment=Unity

You will then be able to search for Spark in you unity dash and launch Spark.

Finally log in with a valid Spark user and enter the server details.