How to add PPA & Install Downloaded Synfig Studio in Ubuntu 15.04?

http://sourceforge.net/projects/synfig/files/releases/1.0-RC5/linux/

Is a deb to install

Be sure to check your Ubuntu arch by running:

uname -m

If you see "i686" then you want the i386 deb, otherwise you want the amd64 version

I downloade following packages from above LINK.

(1). synfigstudio_1.0-RC5_i386.deb -------> 67.0 MB
(2). synfigstudio-1.0.i386.tar.bz2 -----------> 60.3 MB

These are kept in “Home ---> Downloads ----> flareGet “ folder

The output of “uname -m” command shows “i686” that means I should use a 67.0 MB package at no. (1) above. Is it right?

Now what commands should I apply to install this package?

What is the output of:

uname -m

Thanks

Why are you downloading the RC5 release candidate package and not the official release?

I recommend using http://sourceforge.net/projects/synfig/files/releases/1.0/linux/

if uname -a shows i386 or i686 download synfigstudio_1.0_i386.deb
if it shows amd64 then download synfigstudio_1.0_amd64.deb

and then install it with software center.

What command are applied to install the software after downloading a package. Suppose I have downloaded the package in the “Home ---> Downloads ----> flareGet “ folder. What next have I to do? Please state command lines and OBLIGE.

You haven't given the output of the commands we have given....

Use the file explorer to display the folder that contains the .deb package file, right click the file and select 'open with software center' to install it.

As a reply to #6
Output of the command "uname -m" is as under:
------------------------------------------------------------
navin@navin:~$ uname -m
i686
navin@navin:~$
---------------------------------------------------------

As a reply to #7
I opened the .deb package with USC and found option for "Upgrade" (as I had already installed the set package from USC few days back). On selecting updrading option, it gave a warnig as:

"The installation of a package which violates the quality standards isn't allowed. This could cause serious problems on your computer. Please contact the person or organisation who provided this package file and include the details beneath."

So I did not install the new .deb package downloaded. The package is "synfigstudio_1.0-RC5_i386.deb" I also have downloaded the other "synfigstudio-1.0.i386.tar.bz2" package but is is not installable through USC. (as it is not a .deb package)

As already written in response #4, you should have selected not the older release candidate package, but the official published version

Download synfigstudio_1.0_i386.deb from http://sourceforge.net/projects/synfig/files/releases/1.0/linux/ and try installing with software center. If that again refuses to install with 'quality standards' errors, you have to contact the provider of that program to deliver a better version.

Sir,
I downloade the "synfigstudio_1.0_i386.deb" package of 66.90 MB size and could upgrade through USC successfully.
Now the remaining issue is:
How to add PPA of SynfigStudio 1.0?

There are 5 PPAs with versions of synfigstudio, but as far as I can see all of them have older versions than the one that you recently installed. https://launchpad.net/ubuntu/+ppas?name_filter=synfigstudio

So why do you need that it makes sense to add a PPA? I do not see any benefit in doing so.

OK sir.
I had no knowledge about possibility of multiple PPAs. Now it is clear and the one I installed is the latest/newest version.
So now there is no need for that.
Thanks and Regards.