Advanced Packaging Tool, the package manager for Debian-based distributions. It is also the most used tool for installing packages in Ubuntu. Questions about using any of the apt tools should use this tag.

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Updating hard limit of “maximum open files” of running process

I am trying to increase the "maximum open files" limit of my running process (apt-cacher-ng). I am following below link http://gregchapple.com/updating-ulimit-on-running-linux-process/ By following ...
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1answer
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Android KitKat build on Ubuntu 14.04, Wrong JDK

I am trying to build Android-x86 KitKat branch from android-x86.org on an Ubuntu 14.04 64-bit machine. However, when I run make it doesn't run very long until there is an error which halts ...
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15 views

Why is my kernel not upgraded to the latest version?

My server runs Ubuntu 12.04.5 LTS. I try to keep it up to date as possible by doing sudo apt-get update && sudo apt-get upgrade regularly. So far I was assuming that this would update the ...
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Backup and Restore list of installed packages and APT sources

I commonly reinstall Ubuntu and back up my APT stuff [sources, keys and installed package lists] using the tutorial at http://askubuntu.com/a/99151/371765. However I commonly also remove software such ...
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1answer
12 views

after chroot: apt-get update (Err and Failed to fetch - BootableFlashFromHarddiskInstall)

I'm following BootableFlashFromHarddiskInstall tutorial for making a live CD from my current Ubuntu installation. Ubuntu 14.04 on VirtualBox. I checked internet connection of virtual machine as ...
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1answer
9 views

Can't connect to ubuntu keyserver when guest in virtualbox

I'm trying to install an application on an Ubuntu 10.04 via a ppa. This setup is necessary since a customer's error seems to be platform dependent. Here's what sudo add-apt-repository ppa:user/app ...
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2answers
40 views

Apt-get update fails ubuntu 14.04

I im trying to do sudo apt-get update but i get the following error: W: Failed to fetch http://ftp.udc.es/ubuntu/dists/trusty/Release Unable to find expected entry 'main/binary-x8-64/Packages' ...
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1answer
27 views

Unable to download anything from apt-cacher-ng proxy

I have installed apt-cacher-ng on my server. There are about 10 clients which will use this proxy to download the packages. Things were working fine since many days, however, all of sudden I started ...
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1answer
22 views

aptitude tries to reinstall packages I remove with apt-get

I used apt-get a lot in the last time, so there seems something misconfigured in aptitude now: When I type just aptitude install It tries to install lots of packages that i formerly uninstalled ...
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1answer
26 views

Adding git repositories to python 3 interpreter

I am working with Ubuntu 14.4 Trusty Tahr LTS on EC2. I want to use the Python 3.4.0 interpreter which is installed by default. I want to be able to be able to add git repositories to be accessed by ...
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2answers
91 views

Why my kernel is not the latest for 14.04?

My kernel is currently Linux scv 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux But I know it should be 3.13.0-45-generic #74 Why is it not updated by ...
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1answer
39 views

Help: “aptd” is maxing out my CPU?

I am running Ubuntu 12.04 and have a "aptd" process running as root (which I understand is correct) but eating 95% CPU (which is definitely not right). As per one of the answers here How to stop ...
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13 views

Unable to update ubuntu 12.04: GPG error : the public key is not available: NO_PUBKEY 3EF2666A18CEC0F6

W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3EF2666A18CEC0F6 W: Failed to fetch ...
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0answers
27 views

unable to install google chrome on ubuntu 12.04 [duplicate]

i am new on ubuntu and was trying to install dropbox from software center it took long and mean while my computer got powered off and the i restarted my pc and went to software center it showed the ...
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0answers
11 views

Reinstallation of ubuntu causes install option to disappear

I reinstall ubuntu on my machine which causes removal of install option in software center. There are tons of answers available regarding this, I have tried most of them but unable to solve my issue. ...
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0answers
9 views

On Ubuntu 13.04 cannot download openvpn [duplicate]

Need to download the openvpn client but get an error whether I try with synaptic manager or by the 'sudo apt-get install openvpn' from a terminal.... The error in the terminal is: E: Unable to locate ...
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21 views

Problems opening frescobaldi on Ubuntu 14.10

I had frescobaldi installed on my machine running Ubuntu 14,10. I wanted to upgrade to the currrent version of that program and attempted to do so using the source code on their website. Now when I ...
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9 views

A huge apt log file from failed upgrade - what went wrong & how do I fix it?

When attempting to upgrade from the 12.04 to a newer LTS it seemed to hang for ages (a good day or two) on "preparing for upgrade" and then the whole system started to suffer. Eventually I rebooted ...
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1answer
35 views

Software center crashes on Ubuntu 14.04

After I run the software center in terminal it says: bizara@BlackHole2:~$ software-center 2015-02-24 19:27:53,480 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None' 2015-02-24 19:27:54,828 ...
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0answers
13 views

apt-get: How to remove stored action

Following apt-get purge gridengine-client gridengine-common gridengine-exec, aptitude search grideng shows: ong11:~# aptitude search grideng pi gridengine-client - Utilities for Grid Engine ...
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1answer
14 views

Apt-get update comes up with "Sources list couldn't be read

I tried to update the packages through the terminal and I get this error every time, david@david-Satellite-C55-B:~$ apt-get update E: Type ' Now the Software center doesn't work and I have a warning ...
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1answer
15 views

Can't understand difference between liblapack3 and liblapack3gf

I need to install the lapack library in an ubuntu computer for linking to a code I am developing. I have been told to apt-get install liblapack3, but the only one I found is liblapack3gf. My list of ...
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0answers
15 views

How Can Solve VLC Installation [duplicate]

I am Using Ubuntu 14.10! VLC is My Default media player! But all on a sudden I found that the player has been This error could be caused by required additional software packages which are missing or ...
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12 views

Xubuntu -f install problems seems to be causing many problems

When I try to do anything in terminal I get a with -f install. this pops up: $ apt-get -f install E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the ...
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1answer
34 views

sudo apt-get install php5-imagick gives “404 Not Found” error and “E: Failed to fetch …” [duplicate]

Running: sudo apt-get install php5-imagick failed, and produced output including this in the middle: Get:7 http://us.archive.ubuntu.com/ubuntu/ trusty/main libavahi-common3 amd64 0.6.31-4ubuntu1 ...
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0answers
139 views

How to fix unmet dependencies when upgrading? [duplicate]

I'm running Ubuntu 14.04.2. After installing some programs this weekend --and perhaps having been too incautious with ppa's and/or the apt-get autoremove option-- I seem to have unmet dependencies ...
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Is there a way to configure Ubuntu to auto-select doc and devel packages?

Quite often, software comes in multiple packages: The binary package, i.e. foo The documentation package, i.e. foo-doc The developer package, i.e. foo-devel (i.e. if foo is a library) For example, ...
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2answers
40 views

How do I install linux headers when I am getting a “has no installation candidate” error

Primary Problem I am unable to run any virtualization software. Namely Vmware or Virtualbox. Since both of them asks me to install (or produces some error which pints to ) installing build essentials ...
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1answer
28 views

cannot upgrade Kubuntu 14.10

I have Kubuntu 14.10 with Linux desktop001 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:06:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux kernel and when I issue command for system upgrade: clear ...
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2answers
53 views

Error message + Ubuntu Software Center down

I'm new to Ubuntu, and despite all what I could read, I cannot find, or I'm just unable, to fix my problem. In the upper right corner of the screen I have a "stop" sign, that says: An error ...
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1answer
25 views

Does installing a deb file add to repository list? [duplicate]

For example I want to install Google Chrome via deb file. Will it be added to my repository list for apt-get update and apt-get upgrade? If not, how would I go about updating it and other software ...
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2answers
29 views

npm unresponsive after nodejs install on fresh Ubuntu 12.04.5

Here's where I'm at... I have an old chromebook that I put Ubuntu (and Xfce) on via crouton. After installing the chromium browser, I installed nodejs via apt-get. I found that when trying to install ...
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1answer
80 views

Packages are broken with unmet dependencies - cannot install fglrx

I'm new to Ubuntu and trying to survive, but, I can't figure this one out - hopefully it's easy! Ubuntu Software Center says: New software can't be installed, because there is a problem with the ...
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126 views

Unmet dependencies for libglew-dev

I'm getting the following error message when attempting to install libglew-dev, Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not ...
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3answers
57 views

Accidentally installed Lubuntu and want to revert to Ubuntu

I am using Ubuntu 14.04.1 which is a fresh install of about one month old. I was trying to get 5.1 surround audio to work so I followed the instructions here which suggested the following commands: ...
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1answer
36 views

apt-get update says I have not permission [duplicate]

lately whenever i try to update through the terminal I get this message E: could not open lock file /var/lib/apt/lists/lock - open (13: permission denied) E: unable to lock directory ...
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16 views

Error in Installing RevKit

@ubuntu:~$ sudo apt-get install build-essential cmake python-dev ipython python-qt4python-numpy Reading package lists...Done Building dependency tree Reading state information...Done Package ipython ...
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1answer
34 views

Can't install package bcmwl-kernel-source package [duplicate]

Need to get my wireless network adapter working on Ubuntu 14.1, but when trying to install the required package bcmwl-kernel-source, the "apt-get install bcmwl-kernel-source" installation command ...
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1answer
9 views

Install munin via apt, without apache

Is it possible to install Munin via apt without apache ? I'm using already nginx, and it makes for me no sense to run a second web server, even as proxy.
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11 views

Unknown / Unexpected /Unseen apt-get update error (Ubuntu 14.04)? [duplicate]

I am getting error while sudo apt-get update Could not open file /var/lib/dpkg/status open (2: No such file or directory) Can't call method "policy" on an undefined value at ...
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1answer
71 views

How to fix Ubuntu 14.04 update problem?

I am trying to update my Ubuntu 14.04 (64 bit) and the software updater shows this error: Check if you are using third party repositories. If so disable them, since they are a common source of ...
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2answers
25 views

Single list item stopping package manager

Full error log: starts here: E:Unable to parse package file /var/lib/apt/lists/ubuntu.c3sl.ufpr.br_ubuntu_dists_trusty_universe_i18n_Translation-pt%%5fBR (1), The item above is from universe and ...
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0answers
40 views

Linux Mint : Very slow internet connections through proxy [closed]

I have changed to Linux recently. Here I am experiencing very slow Internet connections for applications like apt-get and Firefox browsing through proxy (download speed in Firefox is pretty normal). ...
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0answers
20 views

E: Package 'python-numpy' has no installation candidate

When running sudo apt-get install python-numpy I am getting this error : Reading package lists... Done Building dependency tree Reading state information... Done Package python-numpy is not ...
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1answer
128 views

Problem installing Broadcom BCM43142 on HP Pavilion 15-p073TX NB PC

I know this sounds similar but my problem is unique. I have a new HP Pavilion 15-p073TX NB PC. Recently I installed Ubuntu 14.04.2 but was not able to start WIFI. I searched a bit and got some answers ...
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U 14.04.1 won't load Unity either Terminal or anything at all but the Desktop Background

The problem occurred after installing some updates. The reason for this action was because I wasn't able to install most of the packages I tried to using apt-get and there was suggestion that this ...
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1answer
61 views

Can't get rid of GPG error in apt [closed]

Before you mark this one duplicate hear me out: When I run sudo apt-get update I'm getting the following classic error: W: GPG error: http://de.archive.ubuntu.com trusty-updates Release: The ...
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2answers
225 views

Steam Install Error on 14.04 Ubuntu 64bit

I have tried some of the solutions posted elsewhere in the support forum, one seemed like it worked but after a steam update i found myself back at square one I am a new Linux user and am already at ...
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458 views

Unmet dependences! when install Cuda 6.5 on a freshly installed ubuntu 14.04

I follow the tutorial here to install Cuda 6.5, and when I try apt-get install cuda, I get the following errors: The following packages have unmet dependencies. libcheese-gtk23 : Depends: ...
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1answer
37 views

How to fix GPG error on Intel Linux Graphics Installer?

I'm trying to use Intel Graphics Installer, but i get the following error: E:GPG error: http://ppa.launchpad.net trusty InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require ...