Linux Commands with Semicolon and Pipes

How can you combine the output of 'ls' and 'grep' commands using a pipe?

• ls > grep keyword

• ls | grep keyword

• ls && grep keyword

• ls | grep -v keyword

What is the purpose of using semicolon in Linux commands?

• To execute commands in a specific order

• To add comments in the command line

• To indicate the end of a command

• To separate multiple commands on a single line

Explain how you can redirect the output of a command to a file using pipes.

• Use the '>' symbol followed by the file name to redirect output to a file.

• Use the '|' symbol followed by the file name to redirect output to a file.

• Use the '<' symbol followed by the file name to redirect output to a file.

• Use the '>>' symbol followed by the file name to redirect output to a file.

What command can be used to display the contents of a file and count the number of lines in it?

• wc -l filename

• ls -l filename

• cat -n filename

• grep -c filename

How can you sort the output of a command in reverse order using pipes?

• command_name | sort -f

• command_name | sort -n

• command_name | sort -t

• command_name | sort -r

Describe a scenario where you would use multiple commands separated by semicolons.

• cd folder1 & ls & cd folder2 & ls

• cd folder1 | ls | cd folder2 | ls

• cd folder1 && ls && cd folder2 && ls

• cd folder1; ls; cd folder2; ls

What filter can be used to display only the unique lines in a file?

• unique file.txt

• sort -u file.txt

• uniq file.txt

• grep -v file.txt

How can you check the size of a file in Linux?

• size file.txt

• checksize file.txt

• ls -l file.txt

• filesize file.txt

Explain the difference between using a pipe and a semicolon in Linux commands.

• A pipe (|) is used to separate arguments in a command, while a semicolon (;) is used to concatenate strings

• The pipe (|) is used to chain commands by passing output as input, while a semicolon (;) is used to separate multiple commands to be executed sequentially.

• A pipe (|) is used to execute commands in parallel, while a semicolon (;) is used to execute commands sequentially

• A pipe (|) is used to redirect output to a file, while a semicolon (;) is used to chain commands

What command can be used to search for a specific pattern in a file and display the line number?

• grep -n

• locate -n

• search -n

• find -l