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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“ERROR MESSAGE: Requires installation of untrusted packages”

I'm running Ubuntu 13.04 in VirtualBox 4.3.20. I keep getting the error message shown in the title when I try to download anything in the Software Center. I tried changing servers in "Software and ...
0
votes
1answer
6 views

How are Ubuntu packages structured?

When I download a package in Ubuntu, what files does it install on my system and where? I'm just curious about the package structure in general (I searched and it doesn't look like anyone's asked ...
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2answers
61 views

Can't add cloud-archive:tools to repository

Trying to upgrade to MAAS 1.7, from 1.5, by updating apt-get repository; however, I am getting the following error: $ sudo add-apt-repository cloud-archive:tools Ubuntu Cloud Archive for cloud-tools ...
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1answer
3k views

How to solve “Wrong sources.list entry or malformed file”?

I'm a new user of Ubuntu 13.10 so far so I don't have too much technical expertise. I recently tried to resolve a Skype installation issue and added some ppa involving binary-1386. Every time when I ...
7
votes
1answer
516 views

“The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192”

$ sudo apt-get update W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com maverick ...
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0answers
6 views

Upgrade a diverted package, dpkg error

I have installed ack (replacement for grep). In debian based systems, since the package name ack already existed (something completely different), the package is called "ack-grep". The install ...
1
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0answers
8 views

Dependencies issues linux-image-3.13.0-43-generic

Was setting up Postfix but didnt get too far, because ubuntu returned an dependencies error. Tried to fix this but i cant find the cause to the problem. (apt dpkg: dependency problems prevent ...
0
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1answer
34 views

Messed up while installing octave in Ubuntu 14.04. Having trouble doing apt-get upgrade & apt-get -f install now

Output of apt-get upgrade: Reading package lists... Building dependency tree... Reading state information... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or ...
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1answer
50 views

Chrubuntu 14.04 WINE install unmet dependencies

Okay, I understand that there have been quite a few solutions to this problem. None of them have worked for me. To explain my conundrum I shall post the output of "sudo aptitude install wine1.7". ...
2
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2answers
212 views

List all versions of a package

Is there a equivalent of this command; yum list kernel-headers --showduplicates on Ubuntu with apt-get, apt-cache etc. The above command lists various versions of the kernel-headers rpm available on ...
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0answers
20 views

postgresql 9.3 broken after multiple reinstallations

I would like to remove postgresql 9.3 from my Kubuntu 14.04 system, so that I may do a clean reinstall. I think I installed the version that ships with Kubuntu, but I'm not sure because I installed, ...
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2answers
30 views

Silent installation for apt-get

For work I have to prepare a lot of PCs. I have to shove bunch of sudo apt-get install commands into the terminal - that's quite tedious. I could probably put all of them into sh script (maybe), but ...
3
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4answers
7k views

Item cannot be installed or removed until the package catalogue is repaired

After installing Microsoft Windows Compatibility Layer (meta-package) i receive an error Item cannot be installed or removed until the package catalogue is repaired. Do you want to repair it ...
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0answers
25 views

cant install cuda toolkit

I followed the instructions per this page. Now, I get this error: Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable ...
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votes
1answer
24 views

How to remove unresolved packages (youtube-to-mp3 app)

I am aware that it's a common problem but i am quite new with linux systems and I would like to know how to exactly fix my problem. The following packages have unmet dependencies: youtube-to-mp3: ...
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0answers
49 views

Why has 14.04 LTS no static libraries in some packages?

These are the udev development packages for the last three Ubuntu LTS releases. File list of package libudev-dev in lucid File list of package libudev-dev in precise File list of package libudev-dev ...
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0answers
20 views

g++ and gcc do not work in ubuntu 14.04

After last sudo atp-get upgrade my gcc and g++ don't work and I'm trying to install g++ in my ubuntu 14.04 and I have this error: g++: gcc: What is the problem? sudo apt-get install -f
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1answer
8k views

GPG ERROR NO_PUBKEY : WARNING: The following packages cannot be authenticated! [closed]

I have just stared to receive some strange errors regarding GPG keys. Namely I have just added ppa:ubuntu-toolchain-r/test and wanted to update and after that I got this: W: GPG error: ...
2
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1answer
4k views

cannot install anything via apt-get. problem with apt-get update [duplicate]

I am unable to install anything with apt-get. I think this problem is due to gpg error of some kind. I have done almost everything on the net as per my belief. this is what happens when I run apt-get ...
10
votes
1answer
551 views

Authentication problem with my PPA

I created a package and uploaded it to my PPA. After it got built, I went to install it, but was faced with this message: ******@******-laptop:~$ sudo apt-get install stackapplet Reading package ...
49
votes
4answers
93k views

Will apt-get dist-upgrade upgrade my system to newer version?

I am using Ubuntu 12.04 right now. If I use command sudo apt-get dist-upgrade will that upgrade my ubuntu to 12.10? Does that mean I am not using the LTS version after that? I don't want to use Ubuntu ...
32
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3answers
65k views

What is the Difference Between `apt-get purge` and `apt-get remove`? [duplicate]

Possible Duplicate: What is the correct way to completely remove an application? Is there any difference between sudo apt-get purge <package-name> and sudo apt-get remove ...
0
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1answer
28 views

Unable to locate krb5-admin-server krb5-kdc

I am trying to install Kerberos5 on my ubuntu-14.10-server-64bit, then I type the command: sudo apt-get install krb5-admin-server krb5-kdc I receive E: Unable to locate package krb5-admin-server ...
0
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1answer
5k views

E: Could not open file /var/lib/dpkg/status - open (2: No such file or directory)

When I use sudo apt-get update I get following error. E: Could not open file /var/lib/dpkg/status - open (2: No such file or directory) E: The package lists or status file could not be parsed or ...
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3answers
4k views

Got NODATA issue: 'NODATA' (does the network require authentication?)

Recently, I have ubuntu 14.04 desktop installed on my laptop, I can use my mobile broadband to access Internet with Firefox but when I want to install any package from terminal or make 'apt-get ...
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4answers
2k views

apt-get does not find suggested package (perf tool)

I am using performance counters (https://perf.wiki.kernel.org/index.php/Main_Page) on Ubuntu 13.10 x86_64. If I type perf I get: perf not found for kernel 3.11.0-031100 You may need to install ...
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votes
0answers
32 views

Why this error, some index files failed to download [on hold]

I have this error: E: Some index files failed to download. They have been ignored, or old ones used instead
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0answers
29 views

Ubuntu 12.04: Installing MonoDevelop “broken packages”/“unmet dependencies” error

I am very new to Linux, so please forgive me if the answer to my question is obvious. Since I am running an ARM device and can't install wine, I am trying to install Mono/Develop. The problem is, ...
0
votes
1answer
31 views

/var/run/reboot-required not set after unattended kernel update

I've set up unattended-upgrade on an Ubuntu 14.04.1 server. It has installed the kernel .41 over .40 yesterday at 4:10. Automatic reboot is configured for 3:00, so it should have rebooted last night. ...
6
votes
1answer
596 views

What is the advantage of using sudo apt-get autoremove over a cleaner app?

I'm not overly sure what sudo apt-get autoremove does, but have read that you should use this to remove any unnecessary packages. One of the processes I saw was to use sudo apt-get autoremove and ...
2
votes
3answers
10k views

“Unmet Dependencies” problem when trying apt-get install

Anytime I try to install python packages using the command: sudo apt-get install python-package I get the following output: Reading package lists... Done Building dependency tree Reading ...
0
votes
1answer
12 views

Lazy right management for package installation

You can install a package (here package), by running sudo apt-get install package Some installation scripts written in bash perform such actions and require the user to enter the password every ...
1
vote
1answer
17 views

My repos became corrupted: Unable to parse package file [duplicate]

Suddenly ubuntu 14.04 started to print this: Reading package lists... Error! E: Unable to parse package file ...
3
votes
2answers
2k views

Apt-get broken after termination in mid-install

Long story short, I tried installing something via apt-get install and accidentally terminated the process through terminal. I now can't use apt-get install, Ubuntu Software Center, etc. I tried ...
1
vote
1answer
15 views

How do I resolve apt GPG error NO_PUBKEY?

I do not recall why I have download.opensuse.org, but I am OK just removing whatever is causing this error: W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be ...
0
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0answers
42 views

Can't use sudo apt-get update: Xubuntu 14.04 [duplicate]

When I run sudo apt-get update I get the following errors. Err http: //ppa.launchpad.net trusty/main amd64 Packages 404 Not Found Err http: //ppa.launchpad.net trusty/main ...
0
votes
1answer
37 views

problem when update [duplicate]

When I try to update sudo apt-get update I get this W: Duplicate sources.list entry http://download.videolan.org/pub/debian/stable/ Packages ...
8
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2answers
25k views

How do you open Apt links in Ubuntu?

I'm trying to download an Apt file but I don't know how to. I'm using Firefox too.
0
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3answers
27 views

update for the terminal package always fail

I'm trying to update my Ubuntu 14.10 but for the last few weeks the package terminal always fail while the rest works fine , this is the log from the sudo apt-get update && sudo apt-get ...
8
votes
4answers
10k views

How do I fix APT errors “W: Failed to fetch […] Hash Sum mismatch”?

I don't really know what happened, after reboot I got many crash messages, and if I would open Firefox or Synaptic, they would crash. Synaptic returns this: E: Encountered a section with no Package: ...
0
votes
1answer
4k views

apt-get package is not available but is referred to by another package - but cannot find that package

When I try to install a package with apt-get install, I'll occasionally see a message of the form Package somePackage is not available, but is referred to by another package. This may mean that the ...
40
votes
5answers
11k views

apt-get update only for a specific repository

When I add a ppa and I want to install some of its content is quite annoying to re-update all my apt list using apt-get update Is it instead possible to only sync the content of a given repository?
1
vote
1answer
176 views

Ubuntu unable to update and upgrade to 14.04: GPG Error [duplicate]

I have been looking around the net for solutions but I just cannot get rid of this error. sudo apt-get update Ign http://archive.canonical.com saucy InRelease Ign ...
0
votes
3answers
1k views

apt-get ends up with errors after nvidia 331 installation

I recently installed nvidia-331 driver via Software & Updates -> Additional Drivers tab. Now when I use: sudo apt-get install <package> or sudo apt-get remove <package> ...
0
votes
2answers
34 views

Shall I delete this line in sources.list?

This line deb-src-src http://us.archive.ubuntu.com/ubuntu/ utopic main restricted, Line 63, in sources.list is not known on sudo apt-get update and is causing Synaptic Package Manager and Ubuntu ...
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2answers
5k views

How can I install libgl1-mesa-glx

I am trying to install OpenCPN, a navigation and chart program. The install guide recommend this: It is also possible to install the package via dpkg or rpm, on the condition that all dependencies ...
0
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2answers
287 views

unity-control-center uninstalled itself

I don't know how it got uninstalled since I had it before, but when I try to install it again I get the following error: oierlauzi@akerbeltz:~$ sudo apt-get install unity-control-center Reading ...
0
votes
1answer
17 views

Can I install software even though the repository hasn't been updated for my Ubuntu release version?

I'm trying to install the Fuze Meeting client which I'm planning to use for Webinars at work. They have a Linux client and make it available through an apt Repository. Their installation ...
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vote
2answers
774 views

Installing node with apt-get or downloading the Linux Binaries (.tar.gz)

What is the difference between installing node.js with 'sudo apt-get install nodejs' or downloading the Linux Binaries (.tar.gz) and following these instructions? Is the outcome the same?
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0answers
24 views

14.04 LTS Server - Can SSH and FTP, but no other internet connections

I realized my server wasn't working as normally expected when I was doing something else on it recently. It's like it was unable to connect - which was weird because I could FTP and SSH into it just ...