W5_L1: $hell variables

Welcome to Week 5 Lecture 1 of the course "Introduction to the Linux Shell" by Gandham Phanikumar. Full Course: https://study.iitm.ac.in/es/course_pages/CS1102.html Video Overview In this lecture, you will be introduced to shell variables in Linux and understand how they play a crucial role in system operations. The session explains how to display and manage shell variables while exploring their importance in inter-process communication and software configuration. You will learn about commonly used special variables such as $USER, $HOME, $PWD, $?, and $$. The lecture also covers essential commands like echo, printenv, set, and ps, demonstrating how to view environment and process-related information. In addition, you will gain insights into interpreting program exit codes and managing processes using shell control techniques. By the end of this lecture, you will have a clear understanding of how shell variables influence process behavior and configuration within the Linux environment. About IIT Madras' online Bachelor of Science programme IIT Madras offers four-year BS programmes that aim to provide quality education to all, irrespective of age, educational background, or location. The BS programme has multiple levels, which provide flexibility to students to exit at any of these levels. Depending on the courses completed and credits earned, the learner can receive a Foundation Certificate from IITM CODE (Centre for Outreach and Digital Education), Diploma(s) from IIT Madras, or BSc/BS Degrees from IIT Madras. For more details, Visit: https://www.iitm.ac.in/academics/study-at-iitm/non-campus-bs-programmes #shellvariables #linux #commandline #echo #printenv #set #ps #processid #exitcodes #environmentvariables #uservariables #bash #terminal #commandlineinterface #processcontrol #backgroundprocesses #foregroundprocesses #jobs #top #kill #specialshellvariables #dollarzero #doubledollar #dollarquestionmark #dollarhyphen #processmanagement #shellscripting #IITMadras #LinuxShell #OnlineLearning #Education #Technology