Because i use internet from usb device which supports only on windows, and when I downloaded offline files from packages.ubuntu.com and linuxappsfinder.com and tried to install them in ubuntu, i just double clicked on such file(whose format extension was .deb), then it opened in ubuntu software center but said, dependency is not supported,
How can i install softwares and plugins or codecs in ubuntu, without internet?
I tried to make file through terminal using zipped files, (tar.bz2), but said something xml not found.