Network Manager – How to Temporarily Turn Off NetworkManager from Command-Line

network-manager

The network interface should not make a request for an IP over DHCP. So, what is the command to turn off NetworkManager in Ubuntu?

Update:

I am writing a script in which the interfaces receive static IPs. For this to happen I need to put a line in the script which will turn off NetworkManager. But when I'm not using that script I want to have DHCP on the interfaces.

Best Answer

If you don't want to have your inteface make a DHCP request, simply edit it (right on network manager applet, choose "Edit Connections", click on the interface in question, then choose the IPv4 tab and change "Automatic (DHCP)" to "Manual" and specify your settings manually.

If you need to turn off network manager regardless, use

sudo service network-manager stop

You can specify stop, start or restart for most services.

Htorque notes that service is being deprecated in Ubuntu in favour of the stop, start and restart commands. So :

sudo stop network-manager

would also work. I still prefer using service because, as of Maverick, there's no auto-complete when you use the newer commands. A bug has been filed about this, and from that, a fix has been released, so hopefully this will be rectified in Natty this coming April.

Related Solutions

Ubuntu – 802.1q VLAN interface configuration on Ubuntu 12.04 Desktop

Install VLAN package on your computer:

sudo apt-get install vlan
Edit your /etc/network/interfaces file so it would contain the following:

#The loopback network interface

auto lo
iface lo inet loopback

#This is a list of hotpluggable network interfaces.
#They will be activated automatically by the hotplug subsystem.

auto vlan500

# VLAN 500

iface vlan500 inet static
address xxx.xxx.xxx.xxx
netmask xxx.xxx.xxx.xxx
network xxx.xxx.xxx.xxx
broadcast xxx.xxx.xxx.xxx
mtu 1500
vlan_raw_device eth0

Note: You have to replace my IP addresses, network masks and gateway IP address with your own.

3.Make sure that switch interface you are connected to configured with respective VLANs.

4.Restart your network interface:

sudo /etc/init.d/networking restart

You should see something like:

Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 500 to IF -:eth0:-

Ubuntu – How to configure dhcp to always assign from the lowest unused ip

As suggested by Melebius, the dhcp server in my scenario is not actually in the Ubuntu instance (vm guest) - it was simply a virtualized component (or "part of the virtualization program") on the host machine, with some configurable options. Even if I could configure it, it would have been independent of Ubuntu.

Hence, the workaround using dhcp-requested-address with dhclient seems to be the best option in this situation, with minimal change to a default installation.

Best Answer

Related Solutions

Ubuntu – 802.1q VLAN interface configuration on Ubuntu 12.04 Desktop

Ubuntu – How to configure dhcp to always assign from the lowest unused ip

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