Bash Shell Scripting - Other Shell Variables - Part 1

The video tutorial covers special variables in shell scripting, focusing on $#, $?, $$, and $!. It explains how $# shows the number of arguments, $? provides the exit status of the last command, $$ gives the process ID of the current shell, and $! returns the process ID of the last background process. The tutorial includes examples and explanations to illustrate these concepts.

Describe the behavior of the exit status in Linux or Unix when a command runs successfully.

How can you check the status of the last command executed in a shell?

What happens to the process ID of a subshell after the execution of a shell script?