[root@localhost ~]# ifconfig
-bash: ifconfig: command not found
it seem like ifconfig is not longer there, note that if you do upgrade from centos 6.x , you should be aware of this. If you are going to configure network interface, start to get familiar to command ip. But if you want command ifconfig, you can still install the package net-tools.
Let's restart network interface.
[root@centos7-test1 network-scripts]# service network restart
Restarting network (via systemctl): [ OK ]
[root@centos7-test1 network-scripts]# service network status
Configured devices:
lo eth0
Currently active devices:
lo eth0
[root@centos7-test1 init.d]# systemctl restart network
[root@centos7-test1 init.d]# systemctl status network
network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network)
Active: active (exited) since Tue 2014-07-15 14:33:28 CEST; 13s ago
Process: 11597 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS)
Process: 11753 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)
Jul 15 14:33:27 centos7-test1 network[11753]: Bringing up loopback interface: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Jul 15 14:33:27 centos7-test1 network[11753]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Jul 15 14:33:27 centos7-test1 network[11753]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Jul 15 14:33:28 centos7-test1 network[11753]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Jul 15 14:33:28 centos7-test1 network[11753]: [ OK ]
Jul 15 14:33:28 centos7-test1 network[11753]: Bringing up interface eth0: Connection successfully activated (D-Bus active path: /org/...tion/3)
Jul 15 14:33:28 centos7-test1 network[11753]: [ OK ]
Jul 15 14:33:28 centos7-test1 systemd[1]: Started LSB: Bring up/down networking.
Hint: Some lines were ellipsized, use -l to show in full.
Noticed that service manager now is done via systemctl, C7 is using systemctl in replace of SysV. Also notice configuration file for ifcfg-lo is not loadable? This issue has been file here.
Upstream has changed the default networking service is provided by NetworkManager, which is a dynamic network control and configuration daemon that attempts to keep network devices and connections up and active when they are available.
If it does not install for any reason (which it should not because it comes with predefault installation), you can follow these commands
# # install it
# yum install NetworkManager
# # ensure network manager service is started everything system boot up.
# systemctl enable NetworkManager
# # manual start for now.
# systemctl start NetworkManager
# # check the status.
[root@centos7-test1 ~]# systemctl status NetworkManager
NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled)
Active: active (running) since Tue 2014-07-15 13:39:18 CEST; 3h 40min ago
Main PID: 679 (NetworkManager)
CGroup: /system.slice/NetworkManager.service
├─ 679 /usr/sbin/NetworkManager --no-daemon
└─11896 /sbin/dhclient -d -sf /usr/libexec/nm-dhcp-helper -pf /var/run/dhclient-eth0.pid -lf /var/lib/NetworkManager/dhclient-55911be2-9763-471f...
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: bound to 192.168.0.116 -- renewal in 3581 seconds.
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> (eth0): DHCPv4 state changed renew -> renew
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> address 192.168.0.116
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> plen 24 (255.255.255.0)
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> gateway 192.168.0.1
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> server identifier 192.168.0.1
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> lease time 7200
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> nameserver '192.168.0.1'
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> nameserver '8.8.8.8'
Jul 15 17:05:21 centos7-test1 NetworkManager[679]: <info> domain name 'PowerRanger'
If you are configuring manually remotely, you can use command nmtui. nmtui is a simple curses-based text user interface. But if you want to configure interface using script, better still to use command ip or nmcli. For more information, you can read here.
That's it for this article. I would like to thank my buddy for kind enough to let me ssh and study centos 7 in his host. :) you know who you are! dankeschon!
