Linux Foundation Certified System Administrator (LFCS) — Question 137

Which of the following commands lists all defined variables and functions within Bash?

Answer options

• A. env
• B. set
• C. env -a
• D. echo $ENV

Correct answer: B

Explanation

The command 'set' is the correct choice because it displays all defined variables and functions in the current shell session. The 'env' command shows the environment variables but does not list functions, while 'env -a' is not a standard command for displaying defined variables, and 'echo $ENV' simply displays the value of the ENV variable if it is set.