There is a program known as "calibre" that should be capable of opening and reading non-DRM.lit files. There is also a command-line utility in most repositories known as "convlit" that can convert them to HTML files.
To open these Microsoft Reader (eBook) files without the reader you can use this free program to convert them to pdf format, which you can then open with the free Adobe Acrobat Reader.
http://www.processtext.com/abclit.html
Then if you need to you can copy the text from the pdf & paste it into the program of your choice.
OpenOffice or LibreOffice can open PowerPoint presentations.
In linux command line : tar -zxvf /path_to_your_file/filename.tar.gz
You can copy and backup any file in Linux, even if they are open. However, if the file is being edited, this is generally a bad idea, since the backup will not reflect any recent changes after they are saved.
CNET provides a download link in order to download a lit reader for Microsoft. Lit readers help read files with images which would not be possible to open without the download.
do your own research
Linux is an open system, Unix is not.
linux files dont need extensions
Linux and Unix and their variants have several different ways of locating files. each of the below commands can be used to locate files.findlocatewheriswhich
More or less.
cp.
If you want to share files with other linux computer use NFS. If you want to share files with windows computer use SAMBA.
These files are store electronic books that have been saved in the Microsoft LIT file format. The LIT file format is used by the Microsoft Reader software application. LIT files contain the actual contents of the digital book as well as book's digital rights information. The information limits the number of systems that each digital book can be read. Therefore protecting the copyright rights. They can not be opened.