Linux sets static IP and DNS and changes the NIC name

Ubuntu

Ubuntu if it is the desktop version, because the desktop version installed NetworkManager, modify the contents of the interfaces document, will not take effect, need to first modify/etc/networkmanager/ Networkmanager.conf the managed parameter in the document, set it to true, and then modify the/etc/network/interfaces file to set the static IP.

#The Primary Network Interfaces

Auto Eth0 #表示让网卡开机自动挂载eth0

Iface eth0 inet Static

Address 192.168.3.3

Gateway 192.168.3.1

Netmask 255.255.255.0

#network 192.168.3.0

#broadcast 192.168.3.255

Restart the network for it to take effect

/etc/init.d/networking restart

If you cannot restart it, use the

Ifdown eth0 && ifup eth0

Set up fixed DNS

Vim/etc/resolvconf/resolv.conf.d/base

NameServer 8.8.8.8

Execute resolvconf-u after saving

can also be through vim/etc/network/interfaces, and finally add a sentence

Dns-nameservers 8.8.8.8 4.4.4.4

Centos

/etc/sysconfig/network CentOS setting hostname and network configuration either directly with the Hostnamectl command is OK, and the hostname can be modified.

/etc/sysconfig/network-scripts/ifcfg-eth0 settings for a specific NIC

/etc/resolv.conf Setting up DNS

/etc/hosts setting the specified domain name resolution address

Device=eth0

Bootproto=static

Type=ethernet

Name= "System etho0"

broadcast=192.168.56.255

hwaddr=08:00:27:24:f8:9b

Ipaddr=192.168.56.101

Ipv6init=yes

Ipv6_autoconf=yes

netmask=255.255.255.0

network=192.168.56.1

Onboot=yes

Service Network restart

Change the NIC name to Eth0

①VIM/ETC/SYSCONFIG/NETWORK-SCRIPTS/IFCFG-ENO16777736 will Name=eth0

② Renaming a configuration file

③ disable the predictable naming convention for this, you can pass "net.ifnames=0 biosdevname=0" kernel parameters at startup. This is done by editing/etc/default/grub and adding "net.ifnames=0 biosdevname=0. In the Grubcmd_linelinux variable.

④ Run the command grub2-mkconfig-o/boot/grub2/grub.cfg to regenerate the grub configuration and update the kernel parameters.

⑤ reboot at Ifconfig view should be in effect, according to the CentOS official Wiki FAQ, if you have multiple interfaces, and want to control their device name, rather than let the kernel in its own way name, create,/etc/udev/rules.d/ The xxx-net.rules rule is necessary! Well, let's create a good rule here, too.

Note: The net rule name of the previous system is 70-persistent-net.rules, here I also define the rules by this name! (This step does not make the problem is not big.) ）

⑥ Restart System

There may be a case where the service network restart fails.

①mac address binding issues. Change ifctg-eno167777 that file, MAC address forgot to change, this time delete this file in the Mac binding that line, delete/etc/udev/rules.d/70-xxx This file, this file also has about MAC address settings.

② after changing the name of the network card, remember to change the inside of the Ifcfg-eth0 devices=eno167777 Devices=eth0

Restart the NIC.

Linux sets static IP and DNS and changes the NIC name