如何修改CentOS 7.6的網卡名稱

1. 背景介紹
   在centos5的時候，咱們習慣了eth0這樣的網絡設備命名，在centos6發現網絡設備變成了em1這樣的命名，到了CentOS 7版本對網卡的命名規則又進行了從新定義，所以，對於這個命名規則的修改，仍是讓不少人比較頭疼，沒法適應這種隨機生成的網卡名稱，下面就教你們如何將網卡固定修改成eth0，操做步驟也很簡單；

2. 修改方法
   進入到/etc/sysconfig/network-scripts/目錄下，備份網卡文件
   [root@192168088102-NFS-Server ~]# cd /etc/sysconfig/network-scripts/
   [root@192168088102-NFS-Server network-scripts]# ls
   ifcfg-ens33 ifdown-bnep ifdown-ipv6 ifdown-ppp ifdown-Team ifup ifup-eth ifup-isdn ifup-post ifup-sit ifup-tunnel network-functions
   ifcfg-lo ifdown-eth ifdown-isdn ifdown-routes ifdown-TeamPort ifup-aliases ifup-ippp ifup-plip ifup-ppp ifup-Team ifup-wireless network-functions-ipv6
   ifdown ifdown-ippp ifdown-post ifdown-sit ifdown-tunnel ifup-bnep ifup-ipv6 ifup-plusb ifup-routes ifup-TeamPort init.ipv6-global
   [root@192168088102-NFS-Server network-scripts]# cp ifcfg-ens33 ifcfg-ens33.bak
   [root@192168088102-NFS-Server network-scripts]# ll ifcfg-ens33-rw-r--r--. 1 root root 347 Jul 27 11:41 ifcfg-ens33-rw-r--r--. 1 root root 347 Jul 27 12:48 ifcfg-ens33.bak將網卡文件名稱改成ifcfg-eth0，並修改網卡配置文件[root@192168088102-NFS-Server network-scripts]# mv ifcfg-ens33 ifcfg-eth0[root@192168088102-NFS-Server network-scripts]# ll ifcfg-eth0-rw-r--r--. 1 root root 347 Jul 27 11:41 ifcfg-eth0[root@192168088102-NFS-Server network-scripts]# cat ifcfg-eth0TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=staticDEFROUTE=yesIPV4_FAILURE_FATAL=no#將ens33改成eth0NAME=eth0UUID=7615d0b6-d6c2-46bf-9140-45083e4aed4b#將ens33改成eth0DEVICE=eth0ONBOOT=yesIPADDR=192.168.88.102NETMASK=255.255.255.0GATEWAY=192.168.88.2修改grub文件，添加內核參數net.ifnames=0 biosdevname=0信息，使網卡名稱修改成eth0[root@192168088102-NFS-Server network-scripts]# cat /etc/sysconfig/grubGRUB_TIMEOUT=5GRUB_DISTRIBUTOR="$(sed 's, release .$,,g' /etc/system-release)"GRUB_DEFAULT=savedGRUB_DISABLE_SUBMENU=trueGRUB_TERMINAL_OUTPUT="console"GRUB_CMDLINE_LINUX="crashkernel=auto rhgb net.ifnames=0 biosdevname=0 quiet"GRUB_DISABLE_RECOVERY="true"生成啓動菜單，從新加載到啓動中，並重啓系統[root@192168088102-NFS-Server network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfgGenerating grub configuration file ...Found linux image: /boot/vmlinuz-3.10.0-957.el7.x86_64Found initrd image: /boot/initramfs-3.10.0-957.el7.x86_64.imgFound linux image: /boot/vmlinuz-0-rescue-dc723d2d2d444cf0ae3794ab211366b8Found initrd image: /boot/initramfs-0-rescue-dc723d2d2d444cf0ae3794ab211366b8.imgdone[root@192168088102-NFS-Server network-scripts]# reboot驗證網卡是否成功修改成eth0[root@192168088102-NFS-Server ~]# ip addr1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:b6:52:ed brd ff:ff:ff:ff:ff:ffinet 192.168.88.102/24 brd 192.168.88.255 scope global noprefixroute eth0valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feb6:52ed/64 scope linkvalid_lft forever preferred_lft forever