Cant install Energia on ubuntu help

I am new on linux and i am doing this... downloading the energia then following this steps

• Open a terminal and cd to your how directory:

   cd ~

• unpack the energia using tar.

  tar -tzf /energia-0101E00XYZ-linux64.tgz

In a terminal cd to the directory where you have unpacked Energia. e.g. /home/username/energia-0101E00XYZ-linux64/ and run:

./energia &

and getting this error

----------------------------------------------------------------------------------------------------------

simeon@Aimyni:~$ cd ~
simeon@Aimyni:~$ tar -tzf /energia-0101E00XYZ-linux64.tgz
tar (child): /energia-0101E00XYZ-linux64.tgz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
----------------------------------------------------------------------------------------------------------