重启网卡报错Job for network.service failed because the control process exited with error code.

• 问题：配置静态ip后发现重启不了网卡

[root@localhost ~]# systemctl restart network 
Job for network.service failed because the control process exited with error code.
 See "systemctl status network.service" and "journalctl -xe" for details.

• 首先再次确认了网卡配置是没有问题的，也并没有发现有手误敲错了单词

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
NAME=ens33
UUID=f8506572-64e6-4f3d-b4c3-b7b47514f185
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.20.11
NETMASK=255.255.255.0
PREFIX=24
GATEWAY=192.168.20.2
DNS1=114.114.114.114

根据提示输入systemctl status network.service命令后出现如下错误信息：

Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)

Active: failed (Result: exit-code) since 三 2021-06-23 22:01:47 CST; 1min 16s ago

Docs: man:systemd-sysv-generator(8)

Process: 4681 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)

CGroup: /system.slice/network.service

└─1192 /sbin/dhclient -H mini1 -1 -q -lf /var/lib/dhclient/dhclient--ens33.lease -pf /v...

 
6月 23 22:01:47 mini1 network[4681]: RTNETLINK answers: File exists

6月 23 22:01:47 mini1 network[4681]: RTNETLINK answers: File exists

6月 23 22:01:47 mini1 network[4681]: RTNETLINK answers: File exists

6月 23 22:01:47 mini1 network[4681]: RTNETLINK answers: File exists

6月 23 22:01:47 mini1 network[4681]: RTNETLINK answers: File exists

6月 23 22:01:47 mini1 network[4681]: RTNETLINK answers: File exists

6月 23 22:01:47 mini1 systemd[1]: network.service: control process exited, code=exited status=1

6月 23 22:01:47 mini1 systemd[1]: Failed to start LSB: Bring up/down networking.

6月 23 22:01:47 mini1 systemd[1]: Unit network.service entered failed state.

6月 23 22:01:47 mini1 systemd[1]: network.service failed.

做法如下
和 NetworkManager 服务有冲突，直接关闭 NetworkManger 服务就好了， systemctl stop NetworkManager 。

[root@localhost ~]# systemctl stop NetworkManager
[root@localhost ~]# systemctl restart network

发现成功

[root@localhost ~]# ping www.baidu.com             //也能够上网了
PING www.a.shifen.com (36.152.44.96) 56(84) bytes of data.
64 bytes from 36.152.44.96 (36.152.44.96): icmp_seq=1 ttl=128 time=4.74 ms
64 bytes from 36.152.44.96 (36.152.44.96): icmp_seq=2 ttl=128 time=4.84 ms
64 bytes from 36.152.44.96 (36.152.44.96): icmp_seq=3 ttl=128 time=5.00 ms