在使用RHEL和Centos7，发现网卡名称变成了EnoX，挺不习惯。现更改回旧名称eth0看着顺眼。
1.备份/etc/sysconfig/grub文件
cp /etc/sysconfig/grub /etc/sysconfig/grub.bak
2.编辑/etc/sysconfig/grub文件
vim /etc/sysconfig/grub
在GRUB_CMDLINE_LINUX后的双引号内添加
net.ifnames=0 biosdevname=0
顺序无所谓，注意各参数间空格。
3.重建GRUB配置文件
grub2-mkconfig -o /boot/grub2/grub.cfg
4.备份网卡配置文件和更改网卡文件为eth0
cp /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-ens33.bakmv /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-eth0
ens33可能和各位不一样，具体先ifconfig查看自己的ensx多少。
5.编辑/etc/sysconfig/network-scripts/ifcfg-eth0文件
vim /etc/sysconfig/network-scripts/ifcfg-eth0
把NAME和DEVICE由原来的ens33更改为eth0即可。
6.重启系统即可。
[[email protected] ~]# ip a1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:7b:4d:fb brd ff:ff:ff:ff:ff:ff inet 192.168.24.148/24 brd 192.168.24.255 scope global dynamic eth0 valid_lft 1610sec preferred_lft 1610sec inet6 fe80::f395:669a:c751:9e90/64 scope link valid_lft forever preferred_lft forever
Linux下把动态Ip更改为静态Ip
我需要将ip修改为192.168.24.130
1.查看网关地址，我的是192.168.24.2
[[email protected] ~]# route -nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface0.0.0.0 192.168.24.2 0.0.0.0 UG 100 0 0 eth0192.168.24.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
2.查看DNS, 我的是192.168.24.2
[[email protected] ~]# cat /etc/resolv.conf# Generated by NetworkManagersearch localdomainnameserver 192.168.24.2
3.配置网卡信息，我的是 vi /etc/sysconfig/network-scripts/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="e7b272e4-cf09-46cb-8f85-ab6c9c469979"DEVICE="eth0"ONBOOT="yes"
需要更改的属性：
BOOTPROTO=”dhcp” 修改成 BOOTPROTO=”static”
需要添加的属性：
IPADDR0=192.168.24.130 # ip地址
PREFIXO0=24 #设置子网掩码
GATEWAY0=192.168.24.2 #设置网关
DNS1=8.8.8.8 #设置主DNS
修改后为
TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO="static"DEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=eth0UUID=e7b272e4-cf09-46cb-8f85-ab6c9c469979DEVICE=eth0ONBOOT=yesPREFIXO0=24DNS0=8.8.8.8IPADDR=192.168.24.130PREFIX=24GATEWAY=192.168.24.2
重启网卡
[[email protected] ~]# service network restartRestarting network (via systemctl): [ OK ]
验证：
ping www.baidu.com
[[email protected] ~]# ping www.baidu.comPING www.a.shifen.com (119.75.216.20) 56(84) bytes of data.
查看ip
[[email protected] ~]# ifconfig eth0eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.24.130 netmask 255.255.255.0 broadcast 192.168.24.255 inet6 fe80::f395:669a:c751:9e90 prefixlen 64 scopeid 0x20<link> ether 00:0c:29:7b:4d:fb txqueuelen 1000 (Ethernet) RX packets 3607 bytes 327107 (319.4 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2139 bytes 304955 (297.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
