All Questions(ubuntu)

Getting below error message while issuing :

sudo apt-get update

Get:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease [95.8 kB]
Ign:2 http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.2 InRelease                                                                                                            
Ign:3 http://dl.google.com/linux/chrome/deb stable InRelease                                                                                                                         
Hit:4 http://ppa.launchpad.net/canonical-x/vulkan/ubuntu xenial InRelease                                                                                                
Hit:5 http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.2 Release                                                                            
Hit:6 http://us.archive.ubuntu.com/ubuntu xenial-security InRelease                                                  
Ign:7 http://dl.google.com/linux/talkplugin/deb stable InRelease                                                     
Hit:8 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease                                                   
Ign:9 http://linux.dropbox.com/ubuntu wily InRelease                                           
Hit:10 http://ppa.launchpad.net/numix/ppa/ubuntu xenial InRelease                              
Get:12 http://dl.google.com/linux/chrome/deb stable Release [782 B]      
Hit:13 http://dl.google.com/linux/talkplugin/deb stable Release                  
Ign:14 https://apt.dockerproject.org/repo ubuntu-wily InRelease          
Hit:15 https://apt.dockerproject.org/repo ubuntu-wily Release            
Get:16 http://dl.google.com/linux/chrome/deb stable Release.gpg [181 B]  
Hit:17 http://linux.dropbox.com/ubuntu wily Release                                  
Get:20 http://dl.google.com/linux/chrome/deb stable/main amd64 Packages [1,191 B]
Fetched 98.0 kB in 0s (118 kB/s)                                 
Reading package lists... Done
N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'http://dl.google.com/linux/chrome/deb stable InRelease' doesn't support architecture 'i386'

This cuts across various releases of ubuntu

Other than viewing the history, is there a way to filter my history?

Say I want to search for a command that started with "ssh"?

So I have installed gcc-4.4 and gcc-4.3 (same for g++). Now as far as I remember there is a tool in Ubuntu which sets the symlinks for you if you just tell it which version you want. However it does not seem to work in the newest version, which I find disappointing.

root@nexus:~# update-alternatives --config gcc
update-alternatives: error: no alternatives for gcc.
root@nexus:~# update-alternatives --config cc
There is only one alternative in link group cc: /usr/bin/gcc
Nothing to configure.


root@nexus:~# dpkg -l | grep gcc | awk '{print $2}'
gcc
gcc-4.3
gcc-4.3-base
gcc-4.3-multilib
gcc-4.4
gcc-4.4-base
gcc-4.4-multilib
gcc-4.5-base
gcc-multilib
lib32gcc1
libgcc1

Any ideas?

There's got to be some simple way I'm missing, but for the life of me I can't find it. How do I check my version of GNOME-Shell?

I think I'm being the victim of a bug here. Sometimes while I'm working (I still don't know why), my network traffic goes up to 200 KB/s and stays that way, even tough I'm not doing anything internet-related.

This sometimes happens to me with the CPU usage. When it does, I just run a top command to find out which process is responsible and then kill it. Problem is: I have no way of knowing which process is responsible for my high network usage. Both the resource monitor and the top command only tell me my total network usage, neither of them tells me process specific network info.

I've found questions here about monitoring total bandwidth usage, but, as I mentioned, that's not what I need. Is there another command I can use to find out which process is getting out of hand?

The command iftop gives results that disagree entirely with the information reported by System Monitor. While the latter claims there's high network traffic, the former claims there's barely 1 KB/s.

I've already tried killing all the obvious ones (Firefox, update-manager, Pidgin, etc) with no luck. So far, restarting the machine is the only way I found of getting rid of the issue.