Bash Shell Scripting - Using "semicolon" and "pipe"

The video tutorial covers the execution of multiple commands in a sequence and the use of pipes to pass the output of one command to another. It begins by explaining how to run several commands at once without linking their outputs. Then, it introduces the pipe symbol, which allows the output of one command to be used as the input for another. A practical example is provided using the 'cat', 'grep', and 'wc' commands to filter and count entries in a file. The video concludes with a recap of these concepts.

What is the primary purpose of running multiple commands in a single line without using pipes?

• To reduce CPU usage

• To save command history

• To execute commands sequentially without passing output

• To execute commands in parallel

Which symbol is used to pass the output of one command as input to another?

• Pipe (|)

• Colon (:)

• Semicolon (;)

• Ampersand (&)

In the example provided, which command is used to filter entries from a file?

• ls

• cat

• wc

• grep

What is the purpose of using 'wc -l' in the command sequence?

• To list all files

• To filter specific entries

• To count the number of lines

• To display the file content

What is the main difference between using a semicolon and a pipe in command execution?

• Semicolon executes sequentially without passing output, pipe passes output

• Semicolon passes output, pipe does not

• Semicolon is used for loops, pipe is not

• Semicolon executes commands in parallel, pipe does not