问题：使用systemctl restart network 或 service network restart 命令重启网卡失败，如下所示。
[root@localhost ~]# systemctl restart network
Failed to restart network.service: Unit network.service not found.
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# service network restart
Redirecting to /bin/systemctl restart network.service
Failed to restart network.service: Unit network.service not found.
解决：
1、可以尝试使用以下命令：
service network-manager restart
2、如果是 Kali Linux（Debian），则需要用以下命令：
service networking restart
3、如果是Centos 8，则需要用以下命令：
nmcli c reload
原文链接：
https://blog.csdn.net/l1028386804/article/details/105489968
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the default workstation install sets ONBOOT to no, there’s ur problem! so look at your /etc/sysconfig/network-scripts/ifcfg-ens33 or w/e name it used and change ONBOOT to yes then reboot.
https://www.golinuxcloud.com/unit-network-service-not-found-rhel-8-linux/
