Problems installing pycharm in Ubuntu

I am trying to install pycharm on my linux OS.
following the instructions pycharm/dowload.
Since it is a linux machine I tried running
ietX220:~$ ls
  Desktop pycharm-community-4.0.1
  Documents Music
  pycharm-community- 4.0.1.tar.gz
  Downloads New Folder Templates
  Dropbox octave-workspace Videos
  examples.desktop Pictures VirtualBox VMs
  jdk1.8.0_25 Public Win7-PV2hh-6c3HY-
  QJHM9-8RJJH-P86W8.iso
  ietX220:~$ pycharm-*.tar.gz

pycharm-community-4.0.1.tar.gz: command not found
As you can see the pycharm file is in the current(home) directory but is not found.

Then I opened the tar file made pycharm.sh executable:
chmod +x pycharm.sh
And then ran:
~/pycharm-community-4.0.1/bin$ ./pycharm.sh

Startup Error: Application cannot start in headless mode
ietX220:~/pycharm-community-4.0.1/bin$

What am I doing wrong?