Linux—Centos7修改网卡名称

# Linux—Centos7 修改网卡名称

首先我们先了解不同网卡名称对应的内核参数：

biosdevname=0 net.ifnames=1：网卡名 “enps” 此内核参数一般为默认
biosdevname=1 net.ifnames=0：网卡名 “em*”
biosdevname=0 net.ifnames=0：网卡名 “eth*”

本次以将网卡名命名为 eth * 格式作示例

# 1. 查看当前网卡的信息

[root@manager ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.40.88  netmask 255.255.255.0  broadcast 192.168.40.255
        inet6 fe80::b92f:3dd3:19e7:1311  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:5e:a0:59  txqueuelen 1000  (Ethernet)
        RX packets 75  bytes 8065 (7.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 63  bytes 7754 (7.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

# 2 . 修改配置文件

（1）在下列路径下找到 ifcgf-ens33

[root@manager ~]# cd /etc/sysconfig/network-scripts/
[root@manager network-scripts]# ls
ifcfg-ens33  ifdown-ippp  ifdown-routes    ifup          ifup-ipv6   ifup-ppp       ifup-tunnel
ifcfg-lo     ifdown-ipv6  ifdown-sit       ifup-aliases  ifup-isdn   ifup-routes    ifup-wireless
ifdown       ifdown-isdn  ifdown-Team      ifup-bnep     ifup-plip   ifup-sit       init.ipv6-global
ifdown-bnep  ifdown-post  ifdown-TeamPort  ifup-eth      ifup-plusb  ifup-Team      network-functions
ifdown-eth   ifdown-ppp   ifdown-tunnel    ifup-ippp     ifup-post   ifup-TeamPort  network-functions-ipv6

（2）使用 MV 命令，修改当前网卡的名称

[root@manager ~]# mv ifcfg-ens33 ifcfg-eth0
[root@manager network-scripts]# ls
ifcfg-eth0   ifdown-ippp  ifdown-routes    ifup          ifup-ipv6   ifup-ppp       ifup-tunnel
ifcfg-lo     ifdown-ipv6  ifdown-sit       ifup-aliases  ifup-isdn   ifup-routes    ifup-wireless
ifdown       ifdown-isdn  ifdown-Team      ifup-bnep     ifup-plip   ifup-sit       init.ipv6-global
ifdown-bnep  ifdown-post  ifdown-TeamPort  ifup-eth      ifup-plusb  ifup-Team      network-functions
ifdown-eth   ifdown-ppp   ifdown-tunnel    ifup-ippp     ifup-post   ifup-TeamPort  network-functions-ipv6

（3）同步修改网卡配置文件中的 name 和 device，修改为需要配置网卡的名字

NAME="ens33"
DEVICE="ens33"
 
将上列命令修改为
 
NAME="eth0"
DEVICE="eth0"

（4）修改 grub

[root@manager ~]# cd /etc/default/

#编辑内核信息,在GRUB_CMDLINE_LINUX行添加字段net.ifnames=0 biosdevname=0
[root@manager default]# cat grub 
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=auto rhgb net.ifnames=0 biosdevname=0 quiet"
GRUB_DISABLE_RECOVERY="true"

#生成启动菜单
[root@manager default]# grub2-mkconfig -o /boot/grub2/grub.cfg

（5）完成之后 reboot 重启系统即可

[root@manager default]# reboot

（6）使用 ifconfig 即可查看

[root@manager ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.40.88  netmask 255.255.255.0  broadcast 192.168.40.255
        inet6 fe80::63d4:467f:9b76:e34f  prefixlen 64  scopeid 0x20<link>
        inet6 fe80::1856:7b0:9d1e:7208  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:5e:a0:59  txqueuelen 1000  (Ethernet)
        RX packets 77  bytes 8117 (7.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 62  bytes 7842 (7.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Linux

# Linux—Centos7 修改网卡名称

# 1. 查看当前网卡的信息

# 2 . 修改配置文件

未命名