修改网卡ens33为eth0

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.bak

mv /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。

[root@linfan ~]# ip a

1: lo: 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 forever

2: eth0: 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

[root@linfan ~]# route -n

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

0.0.0.0 192.168.24.2 0.0.0.0 UG 100 0 0 eth0

192.168.24.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0

2.查看DNS, 我的是192.168.24.2

[root@linfan ~]# cat /etc/resolv.conf

# Generated by NetworkManager

search localdomain

nameserver 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"

修改后为

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO="static"

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

NAME=eth0

DEVICE=eth0

ONBOOT=yes

DNS1=192.168.24.2

IPADDR=192.168.24.130

NETMASK=255.255.255.0

GATEWAY=192.168.24.2

重启网卡

[root@linfan ~]# service network restart

Restarting network (via systemctl): [ OK ]

验证：

ping www.baidu.com

[root@linfan ~]# ping www.baidu.com

PING www.a.shifen.com (119.75.216.20) 56(84) bytes of data.

查看ip

[root@linfan ~]# ifconfig eth0

eth0: flags=4163mtu 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

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