This guide shows instuctions about converting PDF into TXT with pdftotext utility. pdftotext is already built-in in Ubuntu along with poppler-utils package. Thanks to Poppler Project and Glyph & Cog for providing this utility.
RPM (Red Hat Package Manager) is a package format used by Red Hat, Fedora, and many others distributions. There are still some applications, especially old appications which is available only in RPM format. So, it's not easy to install that application on Ubuntu. Fortunately, there is an application called alien which can convert RPM package into several package format including Ubuntu package (deb). There is also a GUI front end of alien which makes converting RPM package much easier! Introducing Package Converter!
Unoconv is a command line based application which makes document conversion especially automated document conversion easier. We can convert one even a hundred documents into another format in a single command. Unoconv converts between any document formats which LibreOffice supports or understands. It uses LibreOffice UNO bindings for on interactive conversion of documents. Unoconv needs to start an instance of LibreOffice or use an instance of LibreOffice you might have already running (if any) to do the conversion processes. Supported document formats such as: Open Document Format (.odt), MS Word (.doc), MS Office Open/MS OOXML (.xml), Portable Document Format (.pdf), HTML, XHTML, RTF, Docbook (.xml), and more. You can get list of complete supported formats by running "unoconv --show" (without quotes) on the Terminal.
FF Multi Converter is a simple GUI application which provides one-stop solution for converting files. It can convert video, audio, image, and document by using some open source libraries. It uses FFMPEG for converting video and audio, PythonMagick for converting image, and unoconv for converting document. FF Multi Converter provides an easy way to convert all multimedia files in one place!


