Here is a book on how to analyze and convert text files on Linux. The book is dedicated to everything related to the processing of text information. This includes typing, editing texts, formatting, structuring them, searching, automatic conversion, layout, creating repositories of text information and databases, creating, sending and receiving e-mail, describing office applications, in a word, everything that is within the scope of duties of any employee of a modern office: from manager to secretary. This book is addressed to a wide range of readers: both a beginner and an experienced Linux user.