The lubuntu version I have is: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description:    Ubuntu 19.10 Release:        19.10 Codename:       eoan  When I try to install anything, I get these errors about sources: E: The repository 'http://security.ubuntu.com/ubuntu eoan-security Release' no longer has a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.  Answers about this in other threads say to go into Software Sources and uncheck basically everything, and then only enable main. However, when I enable just main and close, it says:  Your local copy of the software catalog is out of date. A new copy will be downloaded.  So I hit Reload and it says pk-client-error-quark: E: The repository 'http://dk.archive.ubuntu.com/ubuntu eoan Release' does not have a Release file. W: Updating from such a repository can't be done securely, and is therefore disabled by default. W: See apt-secure(8) manpage for repository creation and user configuration details.  (319)  So now I am stuck. How can I install anything now?  I understand that 19.10 is no longer supported. I would be happy to upgrade. However, I cannot seem to upgrade either. When I follow  on upgrading, it says to run sudo apt update &amp;&amp; sudo apt full-upgrade -y However, this encounters the same error about sources as above! How can I make any progress here?  Edit: I have tried the solution in . This allows me to fetch a release file. However, I still remain fundamentally impeded. When I follow the instructions in that post to upgrade my distribution, I receive the following error: $ sudo do-release-upgrade  Checking package manager Reading package lists... Done     Building dependency tree           Reading state information... Done  Calculating the changes  Calculating the changes  Could not calculate the upgrade   An unresolvable problem occurred while calculating the upgrade.   If none of this applies, then please report this bug using the  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If  you want to investigate this yourself the log files in  '/var/log/dist-upgrade' will contain details about the upgrade.  Specifically, look at 'main.log' and 'apt.log'.  When I look at main.log I see: 2021-01-21 13:30:18,069 INFO Using config files '['./DistUpgrade.cfg']' 2021-01-21 13:30:18,069 INFO uname information: 'Linux andromeda 5.3.0-64-generic #58-Ubuntu SMP Fri Jul 10 19:33:51 UTC 2020 x86_64' 2021-01-21 13:30:18,296 INFO apt version: '1.9.4ubuntu0.1' 2021-01-21 13:30:18,296 INFO python version: '3.7.5 (default, Apr 19 2020, 20:18:17)  [GCC 9.2.1 20191008]' 2021-01-21 13:30:18,298 INFO release-upgrader version '20.04.29' started 2021-01-21 13:30:18,307 INFO locale: 'en_DK' 'UTF-8' 2021-01-21 13:30:18,354 DEBUG screen returned: 'There is a screen on:         21705.ubuntu-release-upgrade-screen-window      (2021-01-21 13:27:45)   (Attached) 1 Socket in /run/screen/S-root. ' 2021-01-21 13:30:18,354 INFO found active screen session, re-attaching  which appears unhelpful. There is no file apt.log.
1160
Recently I have installed an older version of Ubuntu on my old machine. Whenever I try to install any software, I get an error saying it couldn't be found:  $ sudo apt-get install vlc Reading package lists... Done                Building dependency tree        Reading state information... Done     E: Couldn't find package vlc
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What is the easiest way to update/upgrade an offline Ubuntu machine with the help of a Windows machine that has internet access?  This question also applies to installing new packages offline and not only updates/upgrades.  The Linux system shall remain completely cut off from the Windows machine, meaning there should be no ethernet connection or the likes between the two computers.  Update:  Please have patience, since I haven't updated this since two weeks. There are some complications getting apt-offline to work properly on Lubuntu and all other methods seem to be too old and deprecated:  AptOff - last update 2006 AptMedium - last update 2007 Keryx - last update 2011, looks like this project was discontinued  I hope I will be able to somehow update the offline machine, finally.  While I was still not able to update/upgrade the offline system due to authentication errors, I accepted an answer, because it's taking too long.
30429
So I have Ubuntu installed on my pc, and I want to upgrade to the new Ubuntu which was just released. When I check for any new updates it doesn't show any upgrades to the new release. How can I fix this? Thanks!
31275
I cannot install any package. It seems the command apt-get update must be run but it throws some errors:  $ sudo apt-get update Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]      Hit:2 http://ve.archive.ubuntu.com/ubuntu xenial InRelease                      Hit:3 http://ve.archive.ubuntu.com/ubuntu xenial-updates InRelease              Hit:4 http://ve.archive.ubuntu.com/ubuntu xenial-backports InRelease            Fetched 102 kB in 23s (4337 B/s)                                                *** Error in `appstreamcli': double free or corruption (fasttop): 0x000000000210f4b0 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7fac8d8317e5] [...] Aborted (core dumped) Reading package lists... Done E: Problem executing scripts APT::Update::Post-Invoke-Success   'if /usr/bin/test -w /var/cache/app-info -a -e /usr/bin/appstreamcli;   then appstreamcli refresh &gt; /dev/null; fi' E: Sub-process returned an error code
27136
I am trying to upgrade to a new Ubuntu version but the update manager does not recognize an update. Why not?
107883
This doubt is hitting me since 2-3 days, so I decided to test it myself. What I did is I installed Ubuntu 16.04.4 in VMWare and edited /etc/apt/sources.list and replaced xenial with bionic using:  sudo sed -i 's/xenial/bionic/g' /etc/apt/sources.list   Then I ran  sudo apt-get update &amp;&amp; sudo apt-get upgrade    I was able to upgrade to 18.04, confirmed by using lsb_release -a. However, I encountered some problems like:   apt does not have a stable CLI interface. Use with caution in scripts. unmet dependency of  python3-aptdaemon.pkcompat Release 'bionic-backports' for 'appstream' not found Broken Unity   I solved all the errors and installed gnome and gdm3.   So, I just want to know is it a good idea to edit sources.list? I know that my system might broke but is there any other specific reason not to use this.  Note: I tested this on Ubuntu 16.04 in VMWare to clear my doubts only.
46301
I am trying to install ia32-libs on Ubuntu 12.04 LTS (x86).  I enabled all the repository sources but I'm receiving the error message below:  ~$ sudo apt-get install ia32-libs   Reading package lists... Done   Building dependency tree          Reading state information... Done   Package ia32-libs is not available, but is referred to by another package.   This may mean that the package is missing, has been obsoleted, or   is only available from another source    E: Package 'ia32-libs' has no installation candidate   output of sudo apt-cache policy ia32-libs    ia32-libs:     Installed: (none)     Candidate: (none)     Version table:     output of cat /etc/apt/sources.list  (removed similar hyperlinks)    deb http://archive.ubuntu.com/ubuntu/ precise restricted main multiverse universe   deb-src archive.ubuntu.com/ubuntu/ precise restricted main multiverse universe #Added by software-properties   deb security.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse   deb-src security.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse #Added by software-properties   deb archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse   deb-src archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse #Added by software-properties
25293
Today is the release of Ubuntu 21.04 (Hirsute Hippo). And I can't update to this version. And also I selected ‘Notify me of a new Ubuntu version’ and changed it to ‘For any new version' on the Updates tab on Software &amp; Update, but it's still not working. In addition, in the terminal, I've written: sudo do-release-upgrade -c  And output was: Checking for a new Ubuntu release No new release found.  What should I do?
108240
I am running Ubuntu 18.04. I wanted to install node and npm on my machine. The apt repository version of node is 8.x, whereas I wanted to have version 12.x (Current LTS version).  I followed the guide here:   As per the guide, I downloaded curl -sL https://deb.nodesource.com/setup_12.x -o nodesource_setup.sh  and then ran it with sudo -E ./nodesource_setup.sh    However, my machine fails to run sudo apt update with the following (full) output:  maxim@fujitsu:~/scripts$ sudo apt update Hit:1 http://gb.archive.ubuntu.com/ubuntu bionic InRelease                  Hit:2 http://gb.archive.ubuntu.com/ubuntu bionic-updates InRelease          Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB] Hit:4 http://gb.archive.ubuntu.com/ubuntu bionic-backports InRelease               E: Repository 'http://security.ubuntu.com/ubuntu bionic-security InRelease' changed its 'Suite' value from 'bionic-updates' to 'bionic-security' N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details. Do you want to accept these changes and continue updating from this repository? [y/N] N Fetched 88.7 kB in 8s (10.5 kB/s)                                                       Reading package lists... Done E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/bionic-security/InRelease   E: Some index files failed to download. They have been ignored, or old ones used instead.    suggests that one should use apt update instead of apt-get update. None the less, I am running apt update.   suggests to answer "Y" to the prompt.  , from the Docker community, makes it clear that doing so is a bad idea.  However, , suggests that sometimes repositories change the names of package sources.  So my question is, is it OK to answer Y here? I don't want to  just blindly accept whatever error the package manager throws at me.
81202
Whenever trying to install some programs from source, or specifically running apt update, I receive this message:  E: The repository 'http://ftp.ca.debian.org/debian stretch/updates Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.   I started getting this after adding the architecture i386. Without it, I would not be able to install the proprietary Nvidia driver, and Steam client would not start at all. This is what my /etc/apt/sources.list reads:  deb http://ftp.ca.debian.org/debian/ stretch main contrib non-free deb-src http://ftp.ca.debian.org/debian/ stretch main contrib non-free  deb http://ftp.ca.debian.org/debian/ stretch/updates main contrib non-free deb-src http://ftp.ca.debian.org/debian/ stretch/updates main contrib non-free  ####stretch-updates, previously known as 'volatile'  deb http://ftp.ca.debian.org/debian/ stretch-updates main contrib non-free  deb-src http://ftp.ca.debian.org/debian/ stretch-updates main contrib non-free
3882
I added some extra repositories with the Software Sources program. But when I reload the package database, I get an error like the following:     W: GPG error:  trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8BAF9A6F   I know I can fix it using apt-key in a terminal, according to the official Ubuntu documentation. But I would have liked to do it graphically. Is there a way to do this without using a terminal?
35528
Google has  so on a 32bit Debian machine it's not possible anymore to update the APT repository:  W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release  Unable to find expected entry 'main/binary-i386/Packages' in Release file (Wrong sources.list entry or malformed file)   Also has the .deb file removed from Google servers as it seems.  Is there any alternative .deb download of the last release (46?) available somewhere?  Reason: For an automated Debian build system (debootstrap-based) I urgently need a way to install Google Chrome 32bit v46 (or similar). Switching to another browser (including Chromium) is not a quick enough option for me at the moment..
55361
I have a laptop with Ubuntu 17.04 desktop installed. And I noticed that Ubuntu has just announced their new version (17.10). However, when I'm trying to open update-manager, it just tells me that I have the newest version.  Also, when I type the sudo do-release-upgrade command on the terminal, it tells me the same thing (No new release found.)  Is there any reasons for that, and what can I do? or should I just wait for that version, to get to the server?
61688
I have Ubuntu 10 server and want to update a package to newer version (update rrdtool from 1.3.8 to current 1.4.5). What should I do? Download and build sources or get package from newer distribution? And how to do that?
49159
I have been running Ubuntu 12.04 for the past few weeks. I recently tried to download and install some files through the Update Manager. It located a few files, downloaded them, but then failed to install them. It gave the error:  installArchives() failed: (Reading database ...  (Reading database ... 80% dpkg: unrecoverable fatal error, aborting:  reading files list for package 'libasn1-8-heimdal': Input/output error   I tried using apt-get upgrade but a similar error was produced:  Reading package lists... Done Building dependency tree        Reading state information... Done The following packages will be upgraded:   icedtea-6-jre-cacao icedtea-6-jre-jamvm openjdk-6-jre openjdk-6-jre-headless   openjdk-6-jre-lib 5 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/34.6 MB of archives. After this operation, 1,024 B of additional disk space will be used. Do you want to continue [Y/n]? y (Reading database ... 80% dpkg: unrecoverable fatal error, aborting:  reading files list for package 'libasn1-8-heimdal': Input/output error E: Sub-process /usr/bin/dpkg returned an error code (2)   Any help would be greatly appreciated. Thanks in advance.  Edit: Here's some extra information that may be useful. My original problem was that the Ubuntu Software Centre would not open. I found that the Update Manager and Synaptic Package Manager also failed to open. They all gave an error along the lines of:   "installArchives() failed: dpkg: error: reading package info file '/var/lib/dpkg/available': Input/output errorError in function:"   After much googling I seemed to fix that problem as the package managers would open again. When I then tried to download and install any updates from the Update Manager I got the error at the beginning of this post.
1926
Any install that I'm trying through the Software Center is telling me:  Requires installation of untrusted packages: The action would require the installation of packages from not authenticated sources.  I did an apt-get update from the command line, then removed the software sources that the keys were bad from (PPAs I added myself), and unchecked them in the software sources for software center, but to no avail.  I can't install anything from software center anymore - only&gt; from the command line with apt-get. Is uninstalling/installing the only option?  I don't want to break other PPAs that I have. Additional information: Here's a paste from apt-get update: Reading package lists... Done W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B725097B3ACC3965 W: GPG error: http://us.archive.ubuntu.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key &lt;ftpmaster@ubuntu.com&gt;  I've tried apt-key update, and there was no effect (two keys unchanged). The output of apt-get update and apt-get upgrade, and the contents of /etc/apt/sources.list, can be found in .
10307
I wanted to upgrade to 14.04.2 point release from 14.04.  What I did was:  sudo apt-get update &amp;&amp; sudo apt-get upgrade &amp;&amp;  sudo apt-get dist-upgrade -y   Then I wanted to upgrade to 3.16 kernel, since it wasn't done with the the above command, so what I did was:  sudo apt-get install linux-generic-lts-utopic xserver-xorg-lts-utopic libegl1-mesa-drivers-lts-utopic xserver-xorg-video-all-lts-utopic xserver-xorg-input-all-lts-utopic sudo apt-get install linux-signed-generic-lts-utopic   Now when I do:   uname -a I get   Linux Y500 3.16.0-33-generic #44~14.04.1-Ubuntu SMP Fri Mar 13 10:33:29 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux  cat /etc/os-release | grep VERSION= I get  VERSION="14.04.2 LTS, Trusty Tahr"   And when I do lsb_release -a I get  Distributor ID: Ubuntu Description:    Ubuntu 14.04.2 LTS Release:    14.04 Codename:   trusty   I know that uname -a and lsb_release -a both refer to different info, but why does  cat /etc/os-release | grep VERSION= show different version?