numcli con show （Error: System

这个问题我的原因是

网卡名称带有空格。命令无法显示。加上双引号就可以啦。

[root@liruilong ~]# nmcli connection show
NAME         UUID                                  TYPE      DEVICE 
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  ethernet  eth0   

[root@liruilong ~]# nmcli con show System eth0
Error: System - no such connection profile.

解决办法：

[root@liruilong ~]# nmcli con show "System eth0"
connection.id:                          System eth0
connection.uuid:                        5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03
connection.stable-id:                   --
connection.type:                        802-3-ethernet
connection.interface-name:              eth0
connection.autoconnect:                 yes
connection.autoconnect-priority:        0
connection.autoconnect-retries:         -1 (default)
connection.multi-connect:               0 (default)
connection.auth-retries:                -1
connection.timestamp:                   1600489843