A. Use df B. Use du/ C. Use du. D. Use df.
A. rpm -q /etc/my.conf B. rpm -requires /etc/my.conf C. rpm -qf /etc/my.conf D. rpm -q | grep /etc/my.conf
A. priority B. nice C. top D. setpri
A. cp fi.txt | f2.txt B. cat f1.txt | f2.txt C. cat f1.txt > f2.txt D. copy f1.txt | f2.txt