Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

You need to make a portable Bourne-style shell script terminate when the path stored in the variable LOGFILE is not both a regular file and writable. Complete the blank line in the excerpt so that the test is POSIX-compliant and protects the variable from word splitting:

# LOGFILE is already set
if __________; then
    echo "Logging to $LOGFILE"
else
    echo "Cannot write to $LOGFILE" >&2
    exit 1
fi

Which command correctly fills in the blank?

  • test -fw "$LOGFILE"

  • [ -f $LOGFILE && -w $LOGFILE ]

  • [[ -f "$LOGFILE" && -w "$LOGFILE" ]]

  • [ -f "$LOGFILE" ] && [ -w "$LOGFILE" ]

CompTIA Linux+ XK0-006 (V8)
Automation, Orchestration, and Scripting
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