The basics of the command language of mobile UNIX-like operating systems (OS) and the basics of programming procedures in the Korn-shell language are considered Operating systems of the UNIX family (Linux, Sysyem V, AIX, MCBC, etc.) ) combine common standards for both the structure of algorithms and control data, and external interfaces for users. UNIX’s capabilities in file management and protection, process management, variable management and export, programming of validation procedures, and loop management are being explored. The study is based on a large number of examples and tasks. A special place is given to control issues and testing. The manual is intended for use in universities, colleges, lyceums and advanced training courses, as well as for self-study of UNIX OS . ;Griff:Recommended by UMO "Nuclear Physics and Technologies" as a teaching aid for students of higher educational institutions