read command in Bash Scripting - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the read command do in Bash scripting?

The read command waits for user input from the keyboard and stores it in a variable.

beginner

How do you store user input into a variable named name using read?

Use read name. This waits for input and saves it in the variable name.

intermediate

What happens if you use read without specifying a variable?

The input is stored in the default variable REPLY.

beginner

How can you prompt the user with a message before reading input?

Use the -p option like read -p "Enter your name: " name to show a prompt.

intermediate

What does the -r option do in the read command?

It prevents backslashes from being treated as escape characters, so input is read literally.

Which variable holds input if you run read without a variable name?

A REPLY

B INPUT

C VAR

D DATA

When no variable is given, read stores input in the special variable REPLY.

How do you display a prompt message before reading input?

A read -r "Message" variable

B read -m "Message" variable

C read -p "Message" variable

D read --prompt "Message" variable

The -p option shows a prompt message before waiting for input.

What does read -r do?

A Reads input literally without interpreting backslashes

B Reads input and removes spaces

C Reads input and converts to uppercase

D Reads input and waits for a timeout

The -r option disables backslash escaping, so input is read exactly as typed.

If you want to read multiple words into separate variables, what does read do?

A Stores all input into the first variable only

B Reads only the first character

C Ignores extra words after the first

D Splits input by spaces and assigns each word to a variable

When multiple variables are given, read splits input by spaces and assigns each word to a variable.

What happens if you press Enter without typing anything when read is waiting?

A The previous value of the variable remains

B The variable is set to an empty string

C The script exits immediately

D An error message appears

Pressing Enter without input sets the variable to an empty string.

Explain how the read command works in Bash scripting and how to use it to get user input.

Think about how you ask a friend a question and wait for their answer.

Describe the purpose of the -r option in the read command and when you might need it.

Imagine typing a file path with backslashes and wanting it exactly as typed.