Questions tagged [ubuntu]

Free, open-source operating system based on Debian GNU/Linux. Ubuntu questions are on topic here, but if you prefer an Ubuntu-only audience there is Ask Ubuntu (

Ubuntu is a computer operating system originally based on the Debian GNU/Linux distribution and distributed as free and open source software.

The related Stack Exchange site, Ask Ubuntu, exists if you would prefer an Ubuntu-only audience, as opposed to the multi-environment/operating system one found here on Super User.


At any given time, two or three Long Term Support (LTS) versions are supported as well as the most recent prior non-LTS version. If the latest stable release is non-LTS, then two non-LTS releases are supported: the current and the prior one. If the latest stable release is an LTS, then only the prior non-LTS release and the LTS releases are supported.

Support means that security and bug fix updates are continuing to be released to the update repositories. When support is dropped for an old release, responsibility for fixing any bugs or security issues is left up to the user.

The latest table of currently supported and unsupported releases can be found on the Releases page of the Ubuntu Wiki.

If your operating system is Ubuntu, you can run the following command to check the support status of the system's installed packages:


These are the Ubuntu version-specific tags on Super User:

  • (Zesty Zapus) end of support: January 2018
  • (Xenial Xerus) LTS end of support: April 2021
  • (Wily Werewolf) end of support: July 28, 2016
  • (Vivid Vervet) end of support: February 4, 2016
  • (Trusty Tahr) LTS end of support: April 2019
  • (Saucy Salamander) end of support: July 17, 2014
  • (Raring Ringtail) end of support: January 27, 2014
  • (Quantal Quetzal) end of support: May 16, 2014
  • (Precise Pangolin) LTS end of support: April 28, 2017
  • (Oneiric Ocelot) end of support: May 9, 2013
  • (Natty Narwhal) end of support: October 28, 2012
  • (Maverick Meerkat) end of support: April 10, 2012
  • (Lucid Lynx) LTS end of support: April 30, 2015
  • (Karmic Koala) end of support: April 30, 2011
  • (Jaunty Jackalope) end of support: October 23, 2010
  • (Intrepid Ibex) end of support: April 30, 2010
  • (Hardy Heron) LTS end of support: May 9, 2013


The officially recognized derivatives of Ubuntu can be found on the Flavours section of About Ubuntu.

These are the Ubuntu derivative tags on Super User:

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How to check which apache modules are enabled/installed?

Which is the most elegant way to check which apache modules are enabled?
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Find what package a file belongs to in Ubuntu/Debian?

I frequently find myself missing a program, man page, or other file when working on my Ubuntu 8.04 system. Is there any simple way to look up what package contains a given file (whether it is installed already or not)? Maybe some obscure option for…
Jay Conrod
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How do I detach a process from Terminal, entirely?

I use Tilda (drop-down terminal) on Ubuntu as my "command central" - pretty much the way others might use GNOME Do, Quicksilver or Launchy. However, I'm struggling with how to completely detach a process (e.g. Firefox) from the terminal it's been…
10 answers

How can I list all IPs in the connected network, through Terminal preferably?

Using Ubuntu 10.10 command line, how can I list all IPs connected to my home network? Ideally, it needs to be a CLI command as I will be running it from C++.
Christopher Gwilliams
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Zsh not hitting ~/.profile

I've just installed zsh on my Ubuntu system. It seems zsh isn't executing ~/.profile on init. To my best understanding, this should be an automatic behavior. What am I missing?
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How do you add a certificate authority (CA) to Ubuntu?

My work has decided to issue their own certificate authority (CA) to handle different aspects of our work securely without paying for certificates. Cryptographically sign emails Encrypt email contents Make access to things like the company IRC…
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What does the asterisk mean after a filename when you type `ls -l`?

I've done an ls -l inside a directory, and my files are displaying like this : james@nevada:~/development/tools/android-sdk-linux_86/tools$ ll total 9512 drwxr-xr-x 3 james james 4096 2010-05-07 19:48 ./ drwxr-xr-x 6 james james 4096…
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How to reload /etc/environment without rebooting?

/etc/environment is officially the correct place for system wide environment variables. But how can I reload the assignments in this file without rebooting or relogging? Interestingly enough google does not help me here, aside from the dozens of…
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How to mount a HFS partition in Ubuntu as Read/Write?

I plugged in my external harddrive (which was formatted on my Mac into HFS+ journaled) to my Ubuntu desktop 9.04 64bit. I am not able to get the drive to mount with write capability, how do I do that? Right now all I'm getting is read access, I…
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How to tell from what Ubuntu or Debian repository a package comes?

On a Debian-based system, including Ubuntu, how can one tell which repository a package will be downloaded from, without actually beginning the download? aptitude show and apt-cache info will show the section (e.g., metapackage, base, graphics), but…
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How to password protect gzip files on the command line?

I want to create some tar.gz (and possibly tar.bz2) files, using the tar command on Ubuntu 10.04. I want to password protect the file. What is the command to do this (I have Googled, but found nothing that shows how to create and extract compressed…
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How to wipe free disk space in Linux?

When a file is deleted, its contents may still be left in the filesystem, unless explicitly overwritten with something else. The wipe command can securely erase files, but does not seem to allow erasing free disk space not used by any files. What…
Alex B
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No USB devices available in VirtualBox

Oracle VirtualBox is unable to list/filter the USB devices attached to my system. As a result, the guest OS is not able to see any USB device either. This is my configuration: Host: VirtualBox 5.0.0 r101573 on Ubuntu 14.04, with Oracle…
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How can I launch the GNOME image viewer from the terminal?

It's the default image viewer for Ubuntu, and apparently it's called Eye of Gnome. I would like to be able to launch it from the command line, passing it a file name to open.
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What does the -p flag do in "mkdir -p"?

What does the -p flag do in mkdir -p?
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