Bash Shell Scripting - Standard I/O Concepts

This video tutorial covers the concepts of standard input and output in Linux, including how to redirect input and output using various symbols. It explains the role of file descriptors in managing input, output, and error streams, and introduces the concept of the Linux 'black hole' file, /dev/null, which discards any data sent to it. The tutorial aims to provide a foundational understanding of these concepts, preparing viewers for practical demonstrations in subsequent videos.

What is the default standard input device in a Linux system?

• Monitor

• Keyboard

• Mouse

• Printer

Which symbol is used for input redirection in Linux?

• Double greater than (>>)

• Greater than (>)

• Less than (<)

• Pipe (|)

What does the pipe symbol (|) do in Linux?

• Redirects input from a file

• Deletes a file

• Appends output to a file

• Passes output of one command as input to another

What file descriptor number is associated with standard error in Linux?

• 2

• 3

• 1

• 0

Which file descriptor is used for standard output?

• 3

• 1

• 0

• 2

What is the purpose of the /dev/null file in Linux?

• Stores temporary files

• Acts as a black hole for data

• Serves as a backup location

• Holds system logs

How can you redirect unwanted output to be ignored in Linux?

• Redirect it to a file

• Use the 'ignore' command

• Send it to /dev/null

• Use the 'delete' command