how do I install a network manager on Ubuntu?

I uninstalled my network manager trying to fix a problem. Now I have no network manager and therefore no internet. So I need one and I need to install it?

Solution 1:

I did not realize the OP could not connect to the internet. You don't need a network manager to connect to the internet. Don't waste your time looking for a different computer and transferring the files. If you have an Ethernet cable connect the computer directly to the modem and then:

sudo nano /etc/network/interfaces

Append the following lines to the end of the file:

allow-hotplug eth0
iface eth0 inet dhcp

Ctrl+X to exit and Y to save. Then:

sudo ifdown eth0
sudo ifup eth0

You should get an internet connection. If you do not have a DHCP server use the following instead (if you don't know if you have a DHCP server, then you probably have one so nevermind the following):

iface eth0 inet static
address 192.168.1.5
netmask 255.255.255.0
gateway 192.168.1.254

Replacing the address, netmask and gateway values with the ones you are used to.

If you cannot possibly connect the computer directly to the modem, you can also manually connect to a wireless AP, though it's much more complicated.

After connecting to the internet:

sudo apt-get install network-manager

or wicd instead of network-manager - it's the one I use.

If you are not on the sudoers list issue su to become root and then do all the commands without sudo.

Solution 2:

To install NetworkManager that is installed by default when you installed Ubuntu, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

sudo apt-get install network-manager 

Thanks to vasa1, I failed to see the no internet part. So what you can do is visit Ubuntu Packages, from a machine that has Internet connectivity (friend's, work, etc.) go down to the bottom of the page, and download Network Manager that corresponds to your Ubuntu version and architecture (32, or 64 bit), (in my case its for 13.04 Raring) and once downloaded, take it over to your system, and install it from the downloaded file.

Solution 3:

Happened to face same problem. That's how i solved it. I happened to remove the network-manager and yep now I have no internet. So I came to know after that best shot is http://packages.ubuntu.com/. So but which package I asked myself.

So what i did i executed command again sudo apt-get install network-manager.

Its obvious it fails, but I came to know what package it was trying to download. e.g in my case if failed while downloading http://in.archive.ubuntu.com/ubuntu/pool/main/n/network-manager-applet/network-manager-gnome_0.9.8.8-0ubuntu4.3_amd6. So that's it, go to your friend system. Hit this url .It will download deb package.

Now copy this package and paste it in /var/cache/apt/archives. And now run again sudo apt-get install network-manager and that's it.

I am hoping all dependencies are already there. So by this way you can install network manager without using any boot device