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1500 questions
165
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
  • 1,935
165
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
  • 2,247
165
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
  • 2,115
165
votes
8 answers

How to edit pdf metadata from command line?

I need a command line tool for editing metadata of pdf-files. I'm using a Aiptek MyNote Premium tablet for writing my notes and minutes on this device, import them later and convert them to pdf automatically with a simple script using inkscape and…
bdr529
  • 3,098
165
votes
7 answers

How to open a folder (with GUI) from terminal?

I want to place a link/shortcut/launcher in my unity panel (ubuntu 12.10). I followed this tutorial on handytutorial.com to create a custom launcher and drag it to the panel. I just need to know which command do I have to input. Is this possible?
Tiago
  • 1,801
165
votes
14 answers

How to fix missing GPG keys?

I have just installed Ubuntu 12.04 and I added some repo, and when I did apt-get update, I got missing gpg key. Following command seems to doesn't work for me: apt-get update 2> /tmp/keymissing; for key in $(grep "NO_PUBKEY" /tmp/keymissing |sed…
Fih
  • 1,943
165
votes
10 answers

How do I use 'chmod' on an NTFS (or FAT32) partition?

I have a script that I need to execute on an NTFS partition. The script's permission is set to 600. I attempted to modify the permissions by running chmod 755 script.sh, which doesn't report a failure or anything - but it also doesn't change the…
Nathan Osman
  • 32,495
165
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
  • 2,325
164
votes
6 answers

How do I enable automatic updates?

Update Manager is constantly offering me updates (e.g. security fixes, updates from PPAs). How can I tell my Ubuntu installation to automatically download and install updates whenever they become available?
David Siegel
  • 9,022
164
votes
7 answers

Bash history handling with multiple terminals

I use mainly Terminator, and it's usually opened with 3 split terminal windows. I also use Gnome terminal for various reasons. I'm wondering how is bash history handled in this case as I sometimes miss previously issued commands when I run…
zetah
  • 9,871
164
votes
7 answers

Missing date & time applet from top Unity panel

I like Unity very much. Recently, I installed Compiz manager and Nautilus Elementary also then tried to Play. During some of my playing around, Unity's clock applet has vanished. I want to make it show the time again. How can I do this?
Dev
  • 1,641
164
votes
9 answers

What is the terminal command to take a screenshot?

What command(s) can I use in the terminal that's equivalent to the PrtSc (Print Screen) button? I am running Ubuntu GNOME.
devav2
  • 37,290
164
votes
5 answers

How can I change the default audio device from command line?

Ubuntu's desktop gui is great for changing audio settings (System->Preferences->Sound), like the default input/output device and setting the volume. However, I would like to be able to do these things from the command-line. What tool is the gui…
paleozogt
  • 1,743
164
votes
7 answers

Is Logitech's Unifying receiver supported?

Logitech has a Unifying receiver that you can add several devices using the same USB device. Is this supported in Ubuntu and if so do I have to additionally configure something so that when adding a new wireless device it gets recognized by the same…
Luis Alvarado
  • 216,643
163
votes
6 answers

What do the nomodeset, quiet and splash kernel parameters mean?

What do Kernel command line parameters (also also known as boot options) mean? When you go to Ubuntu (or better, GRUB) options, you have things like nomodeset, quiet and splash. What do these options mean? I am also interested in other parameters…
Star OS
  • 2,668
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