How to create a icon to run for application in Ubuntu

 1.  Go   to   root  folder and  then open  a  terminal there .  If  not  use  Ctrl  +  L   and  search  "/usr/share/applications"

2. Then  go  to  path  "/usr/share/applications" 

     root@roshans-HP-PrBook-G4:/usr/share/applications#

3. Then  we have  to  give  a  name  for   icon  name as  we want ,

    Here  my  icon  name  is   "intelJIdea"

   sudo  touch intelJIdea.desktop 

4. After  that   sudo vi   intelJIdea.desktop .Then    we  have  to add following  code  to  that  file  

    [Desktop Entry]
    Name=IntelliJ IDEA
    Comment=IntelliJ IDEA IDE
    Exec=/home/roshans/Documents/Software/idea-IC-211.7628.21/bin/idea.sh
    Icon=/home/roshans/Documents/Software/idea-IC-211.7628.21/bin/idea.png
    Terminal=false
    StartupNotify=true
    Type=Application
    Categories=Development;IDE;

5. Then  save  that  file using :wq

6. Then  you  will  be  able  to  find   icon   for  any  application  you  wanted  to  run  using  icon  in the   your  application  list.