hostname
# vi /etc/sysconfig/network
/etc/hosts
静止ping vi /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_all = 0
# cat /etc/resolv.conf
# route -n
route add defult gw 网关
# dig www.baidu.com
# nslookup
# traceroute www.baidu.com
telnet -------- 80
nmp
tcpdump
# tcpdump -n icmp -i eth0
19:13:33.470103 IP 192.168.10.5 > 192.168.10.10: ICMP echo request, id 1, seq 1, length 40
19:13:33.470258 IP 192.168.10.10 > 192.168.10.5: ICMP echo reply, id 1, seq 1, length 40
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原文：http://hequan.blog.51cto.com/5701886/1759297