Ubuntu Restart Network/etc/init.d/networking restart error

Linux version: Ubuntu 12.04

After configuring the gateway, restart the network, prompting/etc/init.d/networking restart is deprecated.

sudo /etc/init.d/networking Restart* running/etc/init.d/networking Restart is deprecated Because it may not enable again some interfaces* Reconfiguring network interfaces ...          [OK]

Search on the internet for half a day, found several ways to try the next.

One argument is that/etc/init.d/networking restart has been discarded, leaving only/etc/init.d/networking Start|stop, but the test results show that stop|start availability is worse.
After the execution of Sudo/etc/init.d/networking stop, except for the loopback other network cards are stopped (sometimes directly crashes ...). ), and cannot be restarted by sudo/etc/init.d/networking start, only rebooting the system.

One way is to update the iptables and restart the NIC

sudo iptables-sudo /etc/init.d/networking restart

But the results are still error, as with the direct implementation of/etc/init.d/networking restart.

Another way is to replace/etc/init.d/networking restart with a command service networking restart.

[Email protected]:/etc/init.d$ Service Networking restartstop:unknown instance:start:Rejected send Message,1Matched rules; Type="Method_call", sender=": 1.94"(uid= +Pid=3847comm="Start Networking") interface="Com.ubuntu.Upstart0_6.Job"Member="Start"Error name="(unset)"requested_reply="0"destination="Com.ubuntu.Upstart"(uid=0Pid=1comm="/sbin/init")
[Email protected]:/etc/init.d$sudoService Networking Restartstop:unknown instance:networking Stop/waiting

The difference is that the error message is different, but visual inspection does not work.

Had to roll up the sleeves of their own dry, open/etc/init.d/networking looked, this is a shell script, the restart of the actual processing command is IFDOWN-A and ifup-a.

Case "$" in
Start
/lib/init/upstart-job Networking Start
;;
Stop
Check_network_file_systems
-------Skip-------

force-reload|restart) process_options log_warning_msg"Running $ deprecated because it may not enable again some interfaces"log_action_begin_msg"Reconfiguring network Interfaces"
 Ifdown  -A--exclude=lo | |true         if ifup-a--exclude=lo; ThenLog_action_end_msg $?ElseLog_action_end_msg $?fi         ;;

Man, Ifdown and Ifup,ifdown can stop a running network port, and Ifup can start the network port configured in the/etc/network/interfaces file and labeled Auto, Auto starts automatically.

Ifdown-a       -a       in/etc/network/interfaces

So try sudo ifdown-a,sudo ifup-a, the NIC restarts successfully.

So, for a network port that needs to be restarted, first confirm that the/etc/network/interfaces configuration has auto ID and then use ifdown-a | The IFUP-A implements a reboot.
Like Eth0 's configuration.

Auto Eth0iface eth0 inet DHCP
----slightly----

Serious spit Slot: A small network card restart function, was modified by Ubuntu chicken Fly Dog Jump!

Resources
Http://www.jscto.net/html/109.html
http://comments.gmane.org/gmane.linux.debian.user/390797

Ubuntu Restart Network/etc/init.d/networking restart error