linux CentOS 7网卡ens33修改为eth0

r囧r小猫 2023-10-05 17:58 3阅读 0赞

## linux CentOS7的网卡ens33修改为eth0 ##

*  Linux 操作系统的网卡设备的传统命名方式是 eth0、eth1、eth2等，而 CentOS7 提供了不同的命名规则，默认是基于固件、拓扑、位置信息来分配。这样做的优点是命名全自动的、可预知的，缺点是比 eth0、wlan0 更难读，比如 ens33 。
 *  如果不习惯使用新的命名规则，可以恢复使用传统的方式命名

1、先编辑网卡的配置文件将里面的NAME, DEVICE项修改为eth0

vim /etc/sysconfig/network-scripts/ifcfg-ens33 
     
    NAME=eth0   //修改为eth0
    ...
    DEVICE=eth0   //修改为eth0

1.  把网卡配置文件改为 ifcfg-eth0

[root@localhost ~]# cd /etc/sysconfig/network-scripts/  
    [root@localhost network-scripts]# mv ifcfg-ens33 ifcfg-eth0

1.  禁用该可预测命名规则。

*  你可以在启动时传递“net.ifnames=0 biosdevname=0 ”的内核参数。
 *  这是通过编辑/etc/default/grub并加入“net.ifnames=0 biosdevname=0 ”到GRUBCMDLINELINUX变量来实现。

编辑 grub 配置文件

[root@mysql ~]# vi /etc/default/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 rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0 rhgb quiet"
    '         /在上面添加 "net.ifnames=0 biosdevname=0"     '
    GRUB_DISABLE_RECOVERY="true"

1.  运行命令grub2-mkconfig -o /boot/grub2/grub.cfg 来重新生成GRUB配置并更新内核参数。

[root@mysql ~]# grub2-mkconfig -o /boot/grub2/grub.cfg

1.  重启网络服务会报错,重启linux系统就好了

systemctl restart network

1.  重新启动linux系统，重启后通过ipaddr 或者ifconfig命令验证

reboot

可以看到网卡改为eth0

[root@client1 ~]# ifconfig
    eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 20.0.0.13  netmask 255.255.255.0  broadcast 20.0.0.255
            inet6 fe80::6d44:3c07:4465:144f  prefixlen 64  scopeid 0x20<link>
            ether 00:0c:29:6a:e9:5c  txqueuelen 1000  (Ethernet)
            RX packets 163  bytes 220240 (215.0 KiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 146  bytes 12383 (12.0 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 1  (Local Loopback)
            RX packets 12  bytes 1404 (1.3 KiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 12  bytes 1404 (1.3 KiB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
            inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
            ether 52:54:00:14:ad:d1  txqueuelen 1000  (Ethernet)
            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

ping www.baidu.com

[root@client1 ~]# ping www.baidu.com
    PING www.wshifen.com (103.235.46.39) 56(84) bytes of data.
    64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=1 ttl=128 time=412 ms
    64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=3 ttl=128 time=330 ms
    64 bytes from 103.235.46.39 (103.235.46.39): icmp_seq=4 ttl=128 time=349 ms