问题描述

也重启了network，但是就是无法获取ip地址。也无法ping通网络。

[root@localhost ~]# 
[root@localhost ~]# systemctl restart network
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ping www.baidu.com
ping: www.baidu.com: 未知的名称或服务
[root@localhost ~]# 
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

解决办法

1、编辑网卡

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 

把ONBOOT=no改为：

ONBOOT=yes

2、ok了

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
[root@localhost ~]# systemctl restart network
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:5b:5b:7d brd ff:ff:ff:ff:ff:ff
    inet 192.168.181.129/24 brd 192.168.181.255 scope global noprefixroute dynamic ens33
       valid_lft 1798sec preferred_lft 1798sec
    inet6 fe80::757f:9d9c:77b9:3bd2/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
[root@localhost ~]# 
[root@localhost ~]# ping www.baidu.com
PING www.a.shifen.com (61.135.169.121) 56(84) bytes of data.
64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=1 ttl=128 time=20.9 ms
64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=2 ttl=128 time=18.9 ms
64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=3 ttl=128 time=22.0 ms
64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=4 ttl=128 time=21.1 ms
^C
--- www.a.shifen.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 18.934/20.750/22.060/1.145 ms
[root@localhost ~]#