virtualbox復制了虛擬機，重新初始化網卡后，需要對/etc/sysconfig/network-scripts/ifcfg-eth0更新UUID值，雖然不改暫時也沒發現有問題。
網上查找需要nmcli工具進行查看。
1.首先我們查看一下nmcli是哪個軟件包提供的
[root@localhost ~]# yum provides "*/nmcli" Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.163.com * extras: mirrors.163.com * updates: mirrors.163.com 1:NetworkManager-0.8.1-113.el6.x86_64 : Network connection manager and user applications Repo : base Matched from: Filename : /usr/bin/nmcli
2.安裝NetworkManager服務
[root@localhost ~]# yum -y install NetworkManager
啟動NetworkManager服務
[root@localhost ~]# /etc/init.d/NetworkManager start
運行nmcli發現有報錯
[root@localhost ~]# nmcli con Error: could not connect to D-Bus.
查看/var/log/messages日志
[root@localhost ~]# more /var/log/messages ... Apr 20 14:53:05 localhost NetworkManager[2013]: <info> NetworkManager (version 0.8.1-113.el6) is starting... Apr 20 14:53:05 localhost NetworkManager[2013]: <info> Read config file /etc/NetworkManager/NetworkManager.conf Apr 20 14:53:05 localhost NetworkManager[2013]: <error> [1492671185.606620] [nm-dbus-manager.c:278] nm_dbus_manager_init_bus(): Could not get the system bus. Make sure the message bus daemon is running! Message: Failed to connect to socket /var/run/dbus/system_bus_socket: Connection refused ...
3.需要先啟動messagebus，再啟動NetworkManager
[root@localhost ~]# /etc/init.d/messagebus start Starting system message bus: [ OK ] [root@localhost ~]# /etc/init.d/NetworkManager start Setting network parameters... [ OK ] Starting NetworkManager daemon: [ OK ]
4.此時再運行nmcli即可查看網卡UUID
[root@localhost ~]# nmcli con NAME UUID TYPE SCOPE TIMESTAMP-REAL System eth0 bbc0e340-6979-4e10-8b98-f1d395e7304e 802-3-ethernet system Thu 20 Apr 2017 02:54:51 PM CST NAME UUID TYPE SCOPE TIMESTAMP-REAL