Bash Shell Scripting - Standard I/O Demo

This video tutorial covers the concept of redirection in Linux systems, including output redirection to files, appending outputs, input redirection, and using pipes to connect commands. It explains how to redirect command outputs to files, overwrite or append to existing files, and use pipes to pass output from one command to another for further processing.

What command is used to display the current directory in Linux?

• PWD

• LS

• CD

• MKDIR

Which symbol is used to redirect the output of a command to a file, overwriting the file if it exists?

• <

• >>

• |

• >

What happens to the contents of a file when you use a single greater than symbol for redirection?

• The file is copied

• The file is appended

• The file is overwritten

• The file is deleted

How can you append the output of a command to an existing file?

• |

• <

• >>

• >

Which symbol is used for input redirection in Linux?

• >>

• >

• |

• <

What is the purpose of the pipe symbol '|' in Linux?

• To connect the output of one command to another

• To delete a file

• To redirect output to a file

• To append output to a file

When using a pipe, what happens to the output of the first command?

• It is displayed on the screen

• It is used as input for the second command

• It is discarded

• It is saved to a file

What is the result of using 'ls | wc -l' in Linux?

• Creates a new file

• Lists all files

• Counts the number of lines in the output of ls

• Displays the current directory

Which command combination will not work as expected due to missing input?

• ls | wc -l

• ls > file.txt

• wc -l

• cat < file.txt

What is the main advantage of using pipes in command-line operations?

• To save disk space

• To reduce command errors

• To connect multiple commands for streamlined processing

• To increase processing speed