linux7启动网络失败,Linux 7 启动网络Failed to start LSB: Bring up/down networking. 解决方法...

在Redhat 7.6 系统中启动网络失败：https://www.cndba.cn/dave/article/3890

[root@www.cndba.cn~]# systemctl start network.service

Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.

[root@www.cndba.cn~]# systemctl status network.service

● network.service - LSB: Bring up/down networking

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

Active: failed (Result: exit-code) since 日 2019-12-29 21:08:02 CST; 18s ago

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

Process: 19628 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)

12月 29 21:08:02 dw8_monitor network[19628]: RTNETLINK answers: File exists

12月 29 21:08:02 dw8_monitor network[19628]: RTNETLINK answers: File exists

12月 29 21:08:02 dw8_monitor network[19628]: RTNETLINK answers: File exists

12月 29 21:08:02 dw8_monitor network[19628]: RTNETLINK answers: File exists

12月 29 21:08:02 dw8_monitor network[19628]: RTNETLINK answers: File exists

12月 29 21:08:02 dw8_monitor network[19628]: RTNETLINK answers: File exists

12月 29 21:08:02 dw8_monitor systemd[1]: network.service: control process exited, code=exited status=1

12月 29 21:08:02 dw8_monitor systemd[1]: Failed to start LSB: Bring up/down networking.

12月 29 21:08:02 dw8_monitor systemd[1]: Unit network.service entered failed state.

12月 29 21:08:02 dw8_monitor systemd[1]: network.service failed.

提示Failed to start LSB: Bring up/down networking. 的错误。 解决方法就是禁用 NetworkManager：https://www.cndba.cn/dave/article/3890https://www.cndba.cn/dave/article/3890

https://www.cndba.cn/dave/article/3890https://www.cndba.cn/dave/article/3890https://www.cndba.cn/dave/article/3890

https://www.cndba.cn/dave/article/3890https://www.cndba.cn/dave/article/3890https://www.cndba.cn/dave/article/3890

[root@www.cndba.cn~]# systemctl stop NetworkManager

[root@www.cndba.cn~]# systemctl disable NetworkManager

Removed symlink /etc/systemd/system/multi-user.target.wants/NetworkManager.service.

Removed symlink /etc/systemd/system/dbus-org.freedesktop.NetworkManager.service.

Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service.

Removed symlink /etc/systemd/system/network-online.target.wants/NetworkManager-wait-online.service.

在重启网络恢复正常：

https://www.cndba.cn/dave/article/3890

[root@www.cndba.cn~]# systemctl restart network

[root@www.cndba.cn~]# ifconfig

ens33: flags=4163 mtu 1500

inet 192.168.74.110 netmask 255.255.255.128 broadcast 192.168.74.127

inet6 fe80::20c:29ff:fec0:2b02 prefixlen 64 scopeid 0x20

ether 00:0c:29:c0:2b:02 txqueuelen 1000 (Ethernet)

RX packets 11 bytes 1012 (1012.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 28 bytes 4388 (4.2 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ens34: flags=4163 mtu 1500

inet 192.168.222.110 netmask 255.255.255.128 broadcast 192.168.222.127

inet6 fe80::20c:29ff:fec0:2b0c prefixlen 64 scopeid 0x20

ether 00:0c:29:c0:2b:0c txqueuelen 1000 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 23 bytes 3511 (3.4 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73 mtu 65536

inet 127.0.0.1 netmask 255.0.0.0

inet6 ::1 prefixlen 128 scopeid 0x10

loop txqueuelen 1000 (Local Loopback)

RX packets 212 bytes 16436 (16.0 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 212 bytes 16436 (16.0 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4099 mtu 1500

inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255

ether 52:54:00:2a:24:af txqueuelen 1000 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 0 bytes 0 (0.0 B)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

[root@www.cndba.cn~]#

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