vim /etc/hostname   #修改主机名  

[root@localhost ~]# reboot  

[root@oldboy ~]

 设置网络编辑器后不能连接互联网  设置图二

图一

图二安装CentOS时设置网卡地址

如果安装系统时没有设置网络

1.cd /etc/sysconfig/network-scripts

2.查看网卡信息  找到ifcfg-eth0 

[root@localhost network-scripts]# ls
ifcfg-eth0   ifdown-isdn      ifdown-tunnel  ifup-isdn    ifup-Team
ifcfg-lo     ifdown-post      ifup           ifup-plip    ifup-TeamPort
ifdown       ifdown-ppp       ifup-aliases   ifup-plusb   ifup-tunnel
ifdown-bnep  ifdown-routes    ifup-bnep      ifup-post    ifup-wireless
ifdown-eth   ifdown-sit       ifup-eth       ifup-ppp     init.ipv6-global
ifdown-ippp  ifdown-Team      ifup-ippp      ifup-routes  network-functions
ifdown-ipv6  ifdown-TeamPort  ifup-ipv6      ifup-sit     network-functions-ipv6

[root@oldboy network-scripts]# vi ifcfg-eth0

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="dhcp"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="eth0"
UUID="7fe86358-a1a8-44f4-95cb-717d2e75572e"
DEVICE="eth0"
ONBOOT="yes"
IPADDR=10.0.0.128
GATEWAY=10.0.0.254
NETMASK=255.255.255.0
DNS=233.5.5.5

4.Esc -->:-->wq-->回车 

CentOS网络设置