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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14.04 hangs, suspicious broken dependency with libefl

Ubuntu's got a broken package dependency and I tried to fix it, but now it won't reboot. I have to admit I haven't been paying as much attention to my Ubuntu server as I should recently even though ...
31
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1answer
7k views

How to fix apt: Signature by key uses weak digest algorithm (SHA1) after installing Chrome?

I have just updated to Ubuntu 16.04 LTS I started setting up by installing Google-Chrome and then went to run a sudo apt-get update again before I started installing other software, and I get the ...
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1answer
209 views

Just installed Ubuntu 16.04 but no software center

Installed Ubuntu 16.04 here are my specs: OS: Ubuntu 16.04 LTS x86_64 Kernel: 4.4.0-21-generic Uptime: up 17 hours, 39 minutes Packages: 3268 Shell: /usr/bin/fish Resolution: 1366x768 Desktop ...
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1answer
36 views

Computer freeze when apt-get

I'm running Ubuntu 14.04 LTS and having a big problem for the last days. Each time I'm launching a package related command (apt-get install ..., apt-get upgrade, some dpkg commands etc..), it does ...
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1answer
484 views

How to fix error W: Target Packages (main/binary-amd64/Packages) is configured multiple times in my sources.list file?

I have Kubntu 16.04 Xenial Xerus and when I want to run commmand sudo apt-get update or sudo apt-get autoclean or sudo apt-get install (package name) or sudo apt-get install -f says me this : Citire ...
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0answers
28 views

Error while updating

I am a new Ubuntu user running 14.04 LTS and I have a question that has been bugging me for 2 days. This is the error I get when I use $ sudo apt-get update: W:Failed to fetch cdrom://Ubuntu 14.04.4 ...
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0answers
210 views

Empty files can't be valid archives when running sudo apt update

I have just make a fresh install of ubuntu 16.04. I've never seen this error on ubuntu 15.10. When I try to run sudo apt update: Hit:1 http://fr.archive.ubuntu.com/ubuntu xenial InRelease Hit:3 ...
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2answers
235 views

Cannot install build-essential on ubuntu 16.04 [closed]

I am trying to install build-essential package on Ubuntu 16.04 (Xenial Xerus) but there is a dependency issue. root@server:~# apt-get install build-essential Reading package lists... Done Building ...
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1answer
86 views

sudo apt-get update failes due to Hash Sum mismatch

When I run sudo apt-get update I get four Hash Sum mismatch errors: W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages Hash Sum mismatch W: ...
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1answer
39 views

'dpkg-source' unpack error on Ubuntu GNOME 16.04

After installing Ubuntu GNOME 16.04 with GNOME 3.20 in a VM I have found that if I run an apt-get source command such as: apt-get source apt I get the following errors after it has downloaded the ...
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1answer
21 views

Mysql-common cannot be uninstalled

I'm trying to completely uninstall mysql to reinstall it later, after uninstalling all mysql-related packages, mysql-common seems to remain in a broken state. $ sudo dpkg -l | grep mysql pc ...
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1answer
114 views

Cannot install Nodejs 4 in Ubuntu 14.04

I've run the following commands in my Vagrant machine. As you can see, I have Node 0.10.40 and I cannot make it update it to 4.4.3 which is the current LTS version. ...
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1answer
366 views

How can I force 16.04 to add a repository even if it isn't considered secure enough?

I really need to install Nvidia Cuda but I'm getting the error E: Failed to fetch file:/var/cuda-repo-7-5-local/Release No Hash entry in Release file ...
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0answers
85 views

Wily to Xenial - repository change question

I have Ubuntu Wily 64 bit installed on a system. I first ran: sudo apt-get update sudo apt-get upgrade and completed installing all the upgrades, available for Wily. Suppose that I manually ...
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1answer
139 views

I'm getting this error when try to update to php5

When I try to upgrade php from 5.3 to 5.6, this wild error appears Extracting templates from packages: 100% (Reading database ... 98172 files and directories currently installed.) Unpacking ...
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0answers
35 views

Is snap/click packaging system be available for other distros? [closed]

I am thinking on install Debian and learn more about the system, but I would like to be able to still have some of the snap apps, that way I could be using Debian stable, and still have updated ...
2
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1answer
20 views

Is choosing 'Security Updates Only' on installation of Ubuntu Server enough?

I want necessary security updates on my Ubuntu servers, without my interference. In general, do I need to do anything else after selecting the 'Security updates only' option in the automatic updates ...
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0answers
36 views

Problem installing skype in Ubuntu 15.10

I am facing problem installing skype. First, I have downloaded latest skype version from the web and try with: sudo dpkg -i skype-ubuntu-precise_4.3.0.37-1_i386.deb And I got this message: ...
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0answers
20 views

How do you find the package that contains a particular symbol?

I recently tried to build a project downloaded from Github, tcsh. https://github.com/tcsh-org/tcsh It turns out I was missing the package was libtinfo-dev (and its dependencies). The configure ...
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0answers
15 views

No desktop and Loading Icons. . . Issue

I've recently installed Ubuntu 15.10 onto a virtual machine, however after logging in there is no icons or anything on the desktop, just the cursor and the background. I have looked online however am ...
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0answers
46 views

Can't Install Cuda on Ubuntu 14.04 Because of Package Conflicts

I believe I have the same problem as this thread, but I have tried the steps listed, and I am not able to solve the problem. I am running Ubuntu 14.04 64bit on a custom desktop with 4GB DDR3 ram, ...
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36 views

Package dependency is not going to be installed

I try to install ROS, but it does not work properly, so they write I should install libgl1-mesa-dev-lts-utopic first. This produces this error, for which I can't find the solution. Why doesn't apt-get ...
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0answers
23 views

Why am I unable to download changelogs for certain new packages?

I have recently found (this started a few days ago) that I am unable to download the changelogs for reasonably new software, though the changelogs do seem to come available later on for some of the ...
0
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1answer
57 views

Problem with IPv6 sudo apt-get update/upgrade

I am using Ubuntu 16.04 Beta 2 at the moment and every time I try to update at home via sudo apt-get update or upgrade trough sudo apt-get upgrade I wont get any feedback. Even installing of anything ...
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2answers
457 views

Repository adding > problem

After running those two commands: sudo add-apt-repository ppa:tualatrix/next sudo apt-get update I am getting this output: Reading package lists... Done W: The repository ...
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1answer
71 views

PPA 404 error upon apt-get update? (related to php7) [duplicate]

I get a 404 error upon php7 update from url http://ppa.launchpad.net/ondrej/php-7.0/ubuntu/dists/wily/main/binary-amd64/Packages Err ppa.launchpad.net wily/main amd64 Packages 404 Not Found Err ...
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1answer
31 views

Installing Qt3 on Ubuntu 15.10

I wanted to try installing THELI (https://www.astro.uni-bonn.de/theli/) on my Ubuntu machine. In the installation notes it says that it needs qt3, and not qt4 or 5, for the GUI to work properly. I ...
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0answers
123 views

Can't update/upgrade du to “Could not execute 'apt-key' to verify signature”

I installed Ubuntu 16.04 last week on my server on a Digital Ocean droplet and since then I can't update nor upgrade anything on my server. Ma version Linux 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 ...
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1answer
28 views

How can'i pass this “ openssh-client' has no installation candidate ”

I am trying to use ssh command, but I have this: sudo ssh git-codecommit.us-east-1.amazonaws.com [sudo] password for dali: sudo: ssh: command not found So when i am trying to install ...
0
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1answer
20 views

Apt-get installation broken after cleanup linux-image-extra-3.13.0-74

I'm having the following issue, yesterday I ran apt-get update, upgrade and then autoremove and now I get errors for anything I try to run regarding apt-get apt-get purge ...
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2answers
15 views

Problem to compile python and C++ code using ubuntu Ubuntu 12.04.5 LTS: problem with gcc

I am trying to compile a code involving python and C++ in Ubuntu 12.04.5 LTS and I have this type of error hammouc@kw13921:~/Documents/mimclib$ make python setup.py clean running clean removing ...
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1answer
42 views

I'm not able to upgrade NodeJS on Ubuntu 14.04

I'm currently using Ubuntu 14.04 LTS, and I installed NodeJS 0.10. I am now trying to upgrade to version 5 of NodeJS. I used the commands below to upgrade: wget -qO- ...
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2answers
46 views

Ubuntu packages don't get update

I get this output: 7 packages can be updated. 7 updates are security updates. Last login: Tue Apr 19 10:04:51 2016 from 10.0.0.199 whenever I connect to my server. and I still see these packages ...
3
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1answer
74 views

E: GPG error: http://mega.nz ./ InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)

Running Xubuntu 14.04LTS Originally, I was getting the following error E: GPG error: http://mega.nz ./ Release: The following signatures were invalid: NODATA 1 NODATA 2 Did what this answer told ...
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1answer
40 views

Unable to connect to internet behind proxy using terminal in ubuntu 14.04

I am having trouble while running sudo apt-get update. It is asking for proxy authentication, even ping google.com not working. Though I have updated apt.conf file at /etc/apt/ location but still not ...
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1answer
18 views

Why are utopic packages installed by default on 14.04.2?

I've installed Ubuntu into VirtualBox 5.0.16 from a 14.04.2 iso image. I didn't do anything fancy, just accepted the defaults all the way through the installation process, except choosing to install ...
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0answers
45 views

Launchpad packages not found upon update

When I run sudo apt-get update I get these errors at some point: W: Failed to fetch http://ppa.launchpad.net/upubuntu-com/web/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found W: Failed ...
1
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1answer
28 views

Removing faulty links from /var/lib/apt/

When I use apt-get, I get the following error: E: GPG error: http://repository.spotify.cofy.com stable Release: The following signatures were invalid: NODATA 1 NODATA 2 I've pasted the link into ...
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0answers
32 views

Why is dpkg -i faster than the ubuntu software center?

Why is using sudo dpkg -i package.deb to install deb packages faster than double clicking on the deb file and installing it through the software center? I have seen a very significant time gap ...
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1answer
35 views

Unable to remove Multiple Nvidia Drivers Ubuntu

There were multiple drivers installed on my Ubuntu 14.04 system, so I was unable to run OpenCL programs. I therefore did sudo apt-get remove --purge nvidia* to start all over again. However when I do ...
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2answers
41 views

Can multiple versions of the same package co-exist on the same system?

In order to install tmux 2.1, I needed to install libtinfo5 version 6, I did this by downloading a .deb archive containing libtinfo5 and installing directly with command: sudo dpkg -i ...
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1answer
31 views

Problem with sudo apt-get upgrade

It tells me to try to run apt-get -f install. The error says "Unmet dependencies. Try using -f." When I try sudo apt-get -f install I get an error that says dpkg-deb: error: subprocess paste was ...
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2answers
24 views

Am i missing packages ? - After removing Wine 1.9.5 - removed packages - help

I have been using Ubuntu for a while now. Yesterday I tried to install WINE 1.9.5. For some reason it didn't show up in the Dash so I tried to uninstall it as instructed in the terminal: sudo ...
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1answer
33 views

Can't install Upwork application on Ubuntu 15 with gksu

I am not able to install Upwork 64 bit application on Ubuntu, reason I am asking this again as I followed the answer posted in another similar question but I could not get it working. I am having ...
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0answers
34 views

Failed to fetch error: Hash Sum mismatch

I can't update. I want to install GNU Radio also but system is not getting update. sudo apt-get install gnuradio also doesn't work.
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1answer
47 views

apt-get -f install is trying to remove sudo

I was trying to get a program to work, and installed a different version of wine that overwrote the version of wine I already had. (That version ended up not working) So I tried installing the default ...
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0answers
27 views

How do I block Zeitgeist from ever being installed on my system?

How do I block Zeitgeist from ever being installed on my system? I find it quite frustrating that this is continually trying to sneak in the back door. I do not want this on my computers, ever though ...
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0answers
37 views

Ran `apt-get dist-upgrade` - now my terminal has a white background?

I am running the Ubuntu 16.04 Beta and I ran apt-get dist-upgrade today and suddenly the background color of my terminal is white (with black text). However, in the preferences of the terminal, it's ...
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0answers
16 views

How to provide a ppa for a project on Github in README?

I have uploaded the source on Github but I want to provide the PPA in the README file so that users can directly do sudo add-apt-repository -y ppa:foo/project Then update the cache using: sudo ...
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0answers
45 views

No space left on device, but there is . Messed up plasma

I installed baloo4 yesterday in an attempt to fix my dolphin search. I shouldn't have done that! When I rebooted, plasma basically doesn't start up properly. Desktop background is black, can't use ...