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1500 questions
163
votes
9 answers

Could not load 'vboxdrv' after upgrade to Ubuntu 16.04 (and I want to keep secure boot)

I upgrade from Ubuntu 15.10 to 16.04 and since then VirtualBox 5.0.18 isn't starting my VMs anymore. It complains that 'vboxdrv' isn't loaded. So I try to load it and get the following error: $ sudo modprobe vboxdrv modprobe: ERROR: could not insert…
jans
  • 1,915
163
votes
2 answers

What is the "show desktop" keyboard shortcut?

I just upgraded to 11.10 from 11.04. Previously the shortcut to show the desktop was Super +D (same as in Windows), But now it is not working. What is the new shortcut?
aneeshep
  • 30,321
163
votes
2 answers

How to install Skype 4.3?

Note: The legacy Skype for Linux application (v4.*) is now discontinued and was removed from Canonical’s partner repositories, so this question and its answers are obsolete. Please refer to a newer answer of our canonical Skype installation…
tuxtu
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163
votes
5 answers

What are zombie processes?

With commands like top and the gui based System Monitor I can see that at the moment I have several zombie processes. What are zombie processes? Do they affect the performance of the system or the application they are zombie to. Do they use too much…
Jesper
  • 2,227
163
votes
7 answers

How to setup OpenVPN Client

I'm trying to setup OpenVPN using NetworkManager. The GUI seems buggy and unresponsive. Are there any other tools for setting up a VPN client?
Nicholas Marshall
  • 1,763
163
votes
6 answers

Best way to cache apt downloads on a LAN?

I have multiple Ubuntu machines at home and a pretty slow internet connection, and sometimes multiple machines need to be updated at once (especially during new Ubuntu releases.) Is there a way where only one of my machines needs to download the…
Ken Simon
  • 2,093
163
votes
6 answers

How to record output to speakers?

Is there a program for Ubuntu that can record sounds of only the output of the speaker and not any voices from outside the PC?
AmirRazoR
  • 3,267
163
votes
7 answers

How can I uninstall a nvidia driver completely ?

As expected, Nvidia drivers have reduced my customizations. I can't login to Unity 3D session. I can't find any content to help me to uninstall the driver and I don't know what to do as I have never uninstalled them before.
VedVals
  • 3,471
163
votes
8 answers

Download files from a list

How can I download files (that are listed in a text file) using wget or some other automatic way? Sample file list: www.example.com/1.pdf www.example.com/2.pdf www.example.com/3.pdf
Sourav
  • 2,305
162
votes
5 answers

How to enable root login?

I would like to enable the root account on my Ubuntu installation. I realize the security implications of this.
Lincity
  • 25,371
162
votes
8 answers

Set "older" kernel as default grub entry

I installed a mainline kernel for testing purposes. I would like to set grub to boot from the older kernel by default. I know I can set the GRUB_DEFAULT=0 setting for the first page of grub but how do I set it to boot by default from one kernel in…
To Do
  • 15,502
162
votes
1 answer

What is the rationale for the `/usr` directory?

What is the rationale for the "unix system resources", or /usr directory, as described here, which duplicates many of the directory names under the root directory /? My purpose: I'm installing Oracle JDK for the umpteenth time and decided this time…
H2ONaCl
  • 9,693
162
votes
8 answers

Pip is not working: ImportError: No module named 'pip._internal'

Running pip or pip3 results with: Traceback (most recent call last): File "/home/myuser/.local/bin/pip", line 7, in from pip._internal import main ImportError: No module named 'pip._internal' I had issues with this, and uninstalled pip3,…
Keweik
  • 1,721
161
votes
3 answers

How do I install svn?

I am trying to install svn and am running into issues. The command I am running is sudo apt-get install svn. When I run this, I get the error "Unable to locate package svn". Why is this? How do I fix it?
coffee
  • 1,611
161
votes
12 answers

How to recover deleted files?

Are there any tools, methods, incantations to recover recently deleted files on Ubuntu? If it makes any difference, I want to recover a Keepass 2.x database file. But would be better to have a method/tool that works on any kind of file.
Decio Lira
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