“Operating Systems” course is conceptualized for the second year of Bachelor studies in Economic Informatics. It comprises of lessons, dealing with the core theoretical aspects of processes, memory administration, deadlocks and interrupts, and more. During laboratory hours we will cover a specific OS, Linux - Ubuntu. This online content is dedicated to the practical aspects of Linux, where we will cover the fundamentals of shell scripting. A working knowledge of shell scripting is essential to anyone wishing to become reasonably proficient at system administration and deepen more their understanding on computer systems management in general, and scripting languages programming, a very useful technical skill.