A.ifconfig eth0 B.ifup eth0 C.ifdown eth0 D.ifconfig eth0 up
A.ifconfigeth0172.18.48.65netmask255.255.255.128 B.ifconfig172.18.48.65netmask255.255.255.128 C.ipconfigeth0172.18.48.65netmask255.255.255.128 D.ifconfigup172.18.48.65netmask255.255.255.128
A.mkswap/dev/sdb2 B.mkswapon C.mkswap/dev/ D.mkswap/dev/sdb