CompTIA Linux+ (XK0-004) — Question 72

An administrator notices the HISTSIZE variable is 50, using the commands below:

HISTSIZE=50 -
export HISTSIZE
The administrator rechecks the HISTSIZE value using echo HISTSIZE but gets no value. Which of the following commands should the administrator use to retrieve its value?

Answer options

• A. printenv | grep $HISTSIZE
• B. echo HISTSIZE
• C. printf HISTSIZE
• D. grep $HISTSIZE

Correct answer: B

Explanation

The command 'echo HISTSIZE' is correct because it is meant to print the value of the HISTSIZE variable. However, it needs to be used as 'echo $HISTSIZE' to retrieve the actual value. The other options do not correctly display the value of the HISTSIZE variable, as they either print the variable name or use incorrect syntax.