[root@localhost ~]# hostname

localhost.localdomain
[root@localhost ~]# hostname k8s-node1 ##临时生效
localhost.localdomain

[root@localhost ~]# hostnamectl set-hostname k8s-node1 ##重启后永久生效

[root@localhost ~]# reboot

Last login: Tue Apr   ::

[root@k8s-node1 ~]# hostname

k8s-node1

[root@k8s-node1 ~]# cat /etc/hostname

k8s-node1

[root@k8s-node1 ~]# hostnamectl

   Static hostname: k8s-node1

         Icon name: computer-vm

           Chassis: vm

        Machine ID: a5a43f5916c643bf83d6f99425a4b9d2

           Boot ID: 0043950ecb374652aebb84e6b8f05fa6

    Virtualization: vmware

  Operating System: CentOS Linux  (Core)

       CPE OS Name: cpe:/o:centos:centos:

            Kernel: Linux 3.10.-.el7.x86_64

      Architecture: x86-

[root@k8s-node1 ~]# 

[root@k8s-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet

PROXY_METHOD=none

BROWSER_ONLY=no

BOOTPROTO=static

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=ens33

UUID=bf3736be---a658-39d7482dfabd

DEVICE=ens33

#ONBOOT=no

ONBOOT=yes

DNS1=192.168.48.2

IPADDR=192.168.48.131

PREFIX=

GATEWAY=192.168.48.2

PEERDNS=yes

PEERROUTES=yes

IPV6_PEERDNS=yes

IPV6_PEERROUTES=yes

[root@k8s-node1 ~]#

[root@k8s-node1 ~]#

[root@k8s-node1 ~]# service network restart

Restarting network (via systemctl):  [  确定  ]

[root@k8s-node1 ~]# 

[root@localhost network-scripts]# ifconfig

ens33: flags=<UP,BROADCAST,RUNNING,MULTICAST>  mtu

        inet 192.168.48.136  netmask 255.255.255.0  broadcast 192.168.48.255

        inet6 fe80:::624d:7d8a:a50a  prefixlen   scopeid 0x20<link>

        ether :0c::::7c  txqueuelen   (Ethernet)

        RX packets   bytes  (45.9 KiB)

        RX errors   dropped   overruns   frame

        TX packets   bytes  (14.9 KiB)

        TX errors   dropped  overruns   carrier   collisions 

lo: flags=<UP,LOOPBACK,RUNNING>  mtu

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::  prefixlen   scopeid 0x10<host>

        loop  txqueuelen   (Local Loopback)

        RX packets   bytes  (14.5 KiB)

        RX errors   dropped   overruns   frame

        TX packets   bytes  (14.5 KiB)

        TX errors   dropped  overruns   carrier   collisions 

virbr0: flags=<UP,BROADCAST,MULTICAST>  mtu

        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255

        ether :::::  txqueuelen   (Ethernet)

        RX packets   bytes  (0.0 B)

        RX errors   dropped   overruns   frame

        TX packets   bytes  (0.0 B)

        TX errors   dropped  overruns   carrier   collisions 

[root@localhost network-scripts]#