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RHEL7/CentOS7安装完成并配置好所有网络相关配置后重启机器，使用systemctl --failed检查是否有失败的服务，发现在network服务启动失败，使用systemctl status network查看服务状态，得到如下错误信息： 01.<SPAN style="FONT-FAMILY: Microsoft YaHei; FONT-SIZE: 14px"># systemctl status network 02.network.service - LSB: Bring up/down networking 03. Loaded: loaded (/etc/rc.d/init.d/network) 04. Active: failed (Result: exit-code) since Sun 2014-11-23 22:09:08 EST; 15min ago 05. Process: 597 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE) 06. 07.Nov 23 22:09:07 hdcoe02 network[597]: Bringing up loopback interface: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' 08.Nov 23 22:09:07 hdcoe02 network[597]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' 09.Nov 23 22:09:08 hdcoe02 network[597]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' 10.Nov 23 22:09:08 hdcoe02 network[597]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' 11.Nov 23 22:09:08 hdcoe02 network[597]: [ OK ] 12.Nov 23 22:09:08 hdcoe02 network[597]: Bringing up interface enp0s25: Error: Connection activation failed: Connection 'enp0s25' is not available on the device enp0s25 at this time. 13.Nov 23 22:09:08 hdcoe02 network[597]: [FAILED] 14.Nov 23 22:09:08 hdcoe02 systemd[1]: network.service: control process exited, code=exited status=1 15.Nov 23 22:09:08 hdcoe02 systemd[1]: Failed to start LSB: Bring up/down networking. 16.Nov 23 22:09:08 hdcoe02 systemd[1]: Unit network.service entered failed state.</SPAN> # systemctl status network network.service - LSB: Bring up/down networking Loaded: loaded (/etc/rc.d/init.d/network) Active: failed (Result: exit-code) since Sun 2014-11-23 22:09:08 EST; 15min ago Process: 597 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE) Nov 23 22:09:07 hdcoe02 network[597]: Bringing up loopback interface: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' Nov 23 22:09:07 hdcoe02 network[597]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' Nov 23 22:09:08 hdcoe02 network[597]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' Nov 23 22:09:08 hdcoe02 network[597]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo' Nov 23 22:09:08 hdcoe02 network[597]: [ OK ] Nov 23 22:09:08 hdcoe02 network[597]: Bringing up interface enp0s25: Error: Connection activation failed: Connection 'enp0s25' is not available on the device enp0s25 at this time. Nov 23 22:09:08 hdcoe02 network[597]: [FAILED] Nov 23 22:09:08 hdcoe02 systemd[1]: network.service: control process exited, code=exited status=1 Nov 23 22:09:08 hdcoe02 systemd[1]: Failed to start LSB: Bring up/down networking. Nov 23 22:09:08 hdcoe02 systemd[1]: Unit network.service entered failed state. 通过查找相关文档，使用如下方法解决了问题：设定开机启动一个名为NetworkManager-wait-online服务，命令为： systemctl enable NetworkManager-wait-online.service (责任编辑：IT) |