A.more-20/home/abC.txt
B.less-20/home/abC.txt
C.head-20/home/abtxt
D.ls-20/home/abC.txt

A.rpmdhcp.3.0pl1-23.i386.rpm
B.rpm-ivhdhcp.3.0pl1-23.i386.rpm
C.setupdhcp
D.rpm-qvhdhcp.3.0pl1-23.i386.rpm

A.80
B.21
C.23
D.25

A.get
B.put
C.mget
D.mput

A.httpD.conf
B.sendmail.cf
C.diphosts
D.host.conf

A.umstat
B.stat
C.list
D.ps

A.进程的用户ID
B.进程调度的级别
C.进程ID
D.父进程ID

A.3
B.5
C.2
D.1

A.目标是一个网段
B.目标是一个主机
C.目标是所有网段
D.目标是所有主机

A.2和0
B.0和0
C.1和0
D.500和500

A.500
B.499
C.0
D.1