A.-c B.-v C.-n D.-i
A.grep"IPADDR$"/etc/sysconfig/network-scripts/ifcfg-eth0 B.grep"IPADDR#"/etc/sysconfig/network-scripts/ifcfg-eth0 C.grep"!IPADDR"/etc/sysconfig/network-scripts/ifcfg-eth0 D.grep"^IPADDR"/etc/sysconfig/network-scripts/ifcfg-eth0
A.-i B.-f C.-n D.-h