Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

A system administrator is writing a script that creates a daily backup. The script must use the path from the BACKUP_TARGET environment variable. If BACKUP_TARGET is unset or empty, the script should use /var/backups as the target for that command only, without permanently changing the variable. Which of the following commands correctly achieves this?

  • cp /var/log/app.log "\((\){BACKUP_TARGET:-/var/backups})/app-$(date +%F).log"

  • cp /var/log/app.log "\({BACKUP_TARGET:=/var/backups}/app-\)(date +%F).log"

  • cp /var/log/app.log "\({BACKUP_TARGET:-/var/backups}/app-\)(date +%F).log"

  • cp /var/log/app.log "(\({BACKUP_TARGET:-/var/backups})/app-\)(date +%F).log"

CompTIA Linux+ XK0-006 (V8)
Automation, Orchestration, and Scripting
Your Score:
Settings & Objectives
Random Mixed
Questions are selected randomly from all chosen topics, with a preference for those you haven’t seen before. You may see several questions from the same objective or domain in a row.
Rotate by Objective
Questions cycle through each objective or domain in turn, helping you avoid long streaks of questions from the same area. You may see some repeat questions, but the distribution will be more balanced across topics.

Check or uncheck an objective to set which questions you will receive.

Wipe Score
Bash, the Crucial Exams Chat Bot
AI Bot