how to install softwares from other os like windows and also run portable softwares
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how to install softwares from other os like windows
You can't, natively at least.
You might have some degree of success (or not at all) using wine (see winehq.org) to run *some* windows programs under linux. For other OSes you might need different emulation layers (dosbox for example, for DOS programs).
and also run portable softwares
If the software is portable as in "it compiles under many oses" then you need to either pick the binary package for linux or compile it yourself in your linux box. You can't run binaries made for other OSes directly on linux, as I already said in the other paragraph above.
If you mean that it's portable like in "java, python or any other language that's interpreted from text or byte-code" then you just need to install the correct virtual machine (like for java) or interpreter (like for python).
I can't be more concrete, since your question if really fuzzy and inaccurate.
Wine is a solution if you would like to have a windows like look and feel. And if you are considering linux just go for RPMs which will be more simple than executables. By the way if you can be more specific like which software you are trying to install the I can help you a bit more.
Wine is an Open Source implementation of the Windows API on top of X, OpenGL, and Unix.
Think of Wine as a compatibility layer for running Windows programs. Wine does not require Microsoft Windows, as it is a completely free alternative implementation of the Windows API consisting of 100% non-Microsoft code, however Wine can optionally use native Windows DLLs if they are available. Wine provides both a development toolkit for porting Windows source code to Unix as well as a program loader, allowing many unmodified Windows programs to run on x86-based Unixes, including Linux, FreeBSD, Mac OS X, and Solaris.
CrossOver Linux allows you to install many popular Windows productivity applications, plugins and games in Linux, without needing a Microsoft Operating System license. CrossOver includes an easy to use, single click interface, which makes installing a Windows application simple and fast. Once installed, your application integrate seamlessly with your Gnome or KDE environment. Just click and run your application, exactly as you would in Windows, but with the full freedom of Linux.
CrossOver Linux lets you use many Windows plugins directly from your Linux browser. Plugins work on any x86 based Linux distribution and will integrate with most browsers including Firefox 1.x, Netscape 6.x, Konqueror, Mozilla, and Opera. CrossOver also integrates with Gnome and KDE to let you transparently open any Word, Excel or PowerPoint file. But even better, you can open these attachment types directly from any mail client.
Portable software as in "run from the USB key whatever the PC" doesn't exist in Linux because the need did not arise se far. It is not unachievable though, as the ROX project shows: http://roscidus.com/desktop/about_rox