Application file formats

Formats of WHAT!?

  What are you asking exactly?

   David
   in TN

for applications...

ubuntu is based on debian so uses debs to install packages. You can install applications using software centre which is in the menus on the OS.

New to Ubuntu: read the Ubuntu Manual, it's very informative: http://ubuntu-manual.org/
Click on the "download Button" to download the latest PDF version.
The online help https://help.ubuntu.com/10.04/index.html

Relax and fun:
http://planet.ubuntu.com/ and Full Circle Magazine http://fullcirclemagazine.org/

thankzz....but is there any way to run exe files on ubuntu?

I'm guessing you mean to install Windows software, if this is your ACTUAL question why didn't you ask that in the first place?

Wine exists but it is a best effort attempt, some apps work amazingly, some refuse to even install, and everyting in between. Instead of using a Windows app it will benefit you to us an open alternative or even better, the open version (assuming one exsists, for example Pidgin runs on both Linux and Windows).

There is a list of windows apps and hos they perform under wine called the appdb, you can search to see if your intended app will work:
http://appdb.winehq.org/objectManager.php?sClass=application&sTitle=Browse%20Applications&sOrderBy=appName&bAscending=true

I read somewhere that using wine hq i could run all exe files on
ubuntu.Is that so?

No it will not run ALL executables at all. Well, they may run (as in cause an activity in the OS when ran), but as to their effectiveness that is a whole different matter.

If an app you need does not run and it is the MAIN use for the system then I suggest you use windows. If it is a casual app you use occasionally then you can use virtualbox and install windows to virtualbox (This will require a valis license and install media), you can then install your app the virtualized system and run your app. You will not get games running in virtualbox, and if your system is of low spec (less than 1Gb RAM) then running 2 operating systems at the same time will really make it struggle to operate.

If you're looking for an alternative solution, you could consider using VirtualBox, a virtualization software. By installing Windows on VirtualBox (which requires a valid license and installation media), you can create a virtualized environment for running your casual app, even if you only use it occasionally. This approach allows you to install and run your app within the virtual system. as you can see here. https://allaplicationsformats.in/