A、more B、cat C、less D、head E、tail
A、head -8 /etc/passwd | tail -4 B、tail -8 /etc/passwd | head -4 C、more -8 /etc/passwd | less -4 D、less -8 /etc/passwd | more -4
A、mkdir /tmp/file B、touch /tmp/file C、mv /tmp/file D、rm /tmp/file