iptables利用的是包过滤机制，所以它会分析数据包的包头数据。

A.kills the process whose PID is 9

B.kills all processes belonging to UID 9

C.sends SIGKILL to the process whose PID is 9

D.sends SIGTERM to the process whose PID IS 9

A./

B.

C.;

D.|

A.$/bin/sh

B.!/bin/sh

C.use/bin/sh

D.setshell=/bin/sh

A.rpm-U*.rpm

B.rpm-F*.rpm

C.rpm-e*.rpm

D.rpm-q*.rpm

A./lib/ld.so

B./etc/ld.so.conf

C./etc/ld.so.cache

D./etc/modules.conf

A.MBR

B./

C.root分区的首扇区

D./LILO

A./var/mail/

B./var/spool/mail/

C./var/spool/mqueue/

D./var/mail/deliver/

A.The Fonts section.

B.The Files section.

C.The xfsCodes section.

D.The Graphics section.

A.cat/proc/modules

B.cat/proc/devices

C.cat/proc/ioports

D.cat/io/dma

A.DISPLAY

B.TERM

C.ECHO

D.OUTPUT