Today I fired up my LapTop, logged into Ubuntu and ran    sudo apt-get update   Then this happened.  Get:1 file:/var/cuda-repo-10-0-local-10.0.130-410.48  InRelease Ign:1 file:/var/cuda-repo-10-0-local-10.0.130-410.48  InRelease Get:2 file:/var/cuda-repo-10-0-local-10.0.130-410.48  Release [574 B] Get:2 file:/var/cuda-repo-10-0-local-10.0.130-410.48  Release [574 B] Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB] Hit:5 http://ppa.launchpad.net/thomas-schiex/blender/ubuntu bionic InRelease    0% [3 InRelease gpgv 83.2 kB] [Connecting to ir.archive.ubuntu.com (185.142.156^0% [Connecting to ir.archive.ubuntu.com (185.142.156.14)]          13.Err:6 http://ir.archive.ubuntu.com/ubuntu bionic InRelease                                                                                              Could not connect to ir.archive.ubuntu.com:80 (185.142.156.14), connection timed out Err:7 http://ir.archive.ubuntu.com/ubuntu bionic-updates InRelease   Unable to connect to ir.archive.ubuntu.com:http: Err:8 http://ir.archive.ubuntu.com/ubuntu bionic-backports InRelease   Unable to connect to ir.archive.ubuntu.com:http: Fetched 83.2 kB in 31s (2,712 B/s) Reading package lists... Done W: Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/bionic/InRelease  Could not connect to ir.archive.ubuntu.com:80 (185.142.156.14), connection timed out W: Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease  Unable to connect to ir.archive.ubuntu.com:http: W: Failed to fetch http://ir.archive.ubuntu.com/ubuntu/dists/bionic-backports/InRelease  Unable to connect to ir.archive.ubuntu.com:http: W: Some index files failed to download. They have been ignored, or old ones used instead.  Any ideas what could cause this? Could it be that those links are not working anymore? If so where can I find new ones?  Thank you &lt;3
13228
Downloading from the main Ubuntu archive is slow even when it's not release day, how can I get apt-get to automatically use a mirror that is close to me?
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
85552
I am performing an update and its failing on the following:  The repository 'http://ppa.launchpad.net/izx/askubuntu/ubuntu xenial Release' does not have a Release file..   Running a local Ubuntu server 16.04
13471
Like , I can't run apt-get update sometimes. Restarting or waiting for a while makes the problem go away. I never have issues pinging or visiting the respective URLs in a browser.  I've tried every up-voted answer to no avail. What is apt doing that is so different to ping or my browser? For example, when I run apt-get update I see this:  Err:1 https://download.docker.com/linux/ubuntu xenial InRelease   Could not resolve host: download.docker.com Err:2 https://deb.opera.com/opera-stable stable InRelease   Could not resolve host: deb.opera.com Err:3 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease   Could not resolve 'ppa.launchpad.net' Err:4 http://ppa.launchpad.net/saiarcot895/myppa/ubuntu xenial InRelease   Could not resolve 'ppa.launchpad.net' Err:5 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu xenial InRelease   Could not resolve 'ppa.launchpad.net' Err:6 http://repository.spotify.com stable InRelease   Could not resolve 'repository.spotify.com' Err:7 http://dl.google.com/linux/chrome/deb stable InRelease   Could not resolve 'dl.google.com' Err:8 http://archive.ubuntu.com/ubuntu xenial InRelease   Could not resolve 'archive.ubuntu.com' Err:9 http://archive.ubuntu.com/ubuntu xenial-updates InRelease   Could not resolve 'archive.ubuntu.com' Err:10 http://archive.ubuntu.com/ubuntu xenial-backports InRelease   Could not resolve 'archive.ubuntu.com' Err:11 http://archive.ubuntu.com/ubuntu xenial-security InRelease   Could not resolve 'archive.ubuntu.com' Reading package lists... Done W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease  Could not resolve 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease  Could not resolve 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease  Could not resolve 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-security/InRelease  Could not resolve 'archive.ubuntu.com' W: Failed to fetch https://download.docker.com/linux/ubuntu/dists/xenial/InRelease  Could not resolve host: download.docker.com W: Failed to fetch http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu/dists/xenial/InRelease  Could not resolve 'ppa.launchpad.net' W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease  Could not resolve 'dl.google.com' W: Failed to fetch https://deb.opera.com/opera-stable/dists/stable/InRelease  Could not resolve host: deb.opera.com W: Failed to fetch http://ppa.launchpad.net/saiarcot895/myppa/ubuntu/dists/xenial/InRelease  Could not resolve 'ppa.launchpad.net' W: Failed to fetch http://repository.spotify.com/dists/stable/InRelease  Could not resolve 'repository.spotify.com' W: Failed to fetch http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu/dists/xenial/InRelease  Could not resolve 'ppa.launchpad.net' W: Some index files failed to download. They have been ignored, or old ones used instead.   Running ping download.docker.com:  PING d2h67oheeuigaw.cloudfront.net (52.85.41.233) 56(84) bytes of data. 64 bytes from server-52-85-41-233.mel50.r.cloudfront.net (52.85.41.233): icmp_seq=1 ttl=251 time=18.8 ms 64 bytes from server-52-85-41-233.mel50.r.cloudfront.net (52.85.41.233): icmp_seq=2 ttl=251 time=18.4 ms 64 bytes from server-52-85-41-233.mel50.r.cloudfront.net (52.85.41.233): icmp_seq=3 ttl=251 time=19.5 ms   And visiting the page in my browser works fine. How can I make apt-get "just work"?  Here is the contents of my /etc/apt/resolv.conf:  # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.1.1 search home.gateway
84501
I am running 19.10 on a Lenovo flex 11 and all seems to be working smoothly. I regularly check for updates and often get something new installed apparently. Well, today I checked for updates and get the message "Failed to load repository information". My network connection is good...hello, my question is getting in here...so what is going on? Fetching e-mail works, surfing the web works, streaming works, but am unable to download repository information. What's up? results of update attempt:  tom@tom-Lenovo-FLEX-6-11IGM:~$ sudo apt update [sudo] password for tom:  Ign:1 http://dl.google.com/linux/earth/deb stable InRelease Hit:2 http://us.archive.ubuntu.com/ubuntu eoan InRelease                     Hit:3 http://us.archive.ubuntu.com/ubuntu eoan-updates InRelease             Hit:4 http://us.archive.ubuntu.com/ubuntu eoan-backports InRelease Get:5 http://dl.google.com/linux/earth/deb stable Release [933 B] Get:6 http://dl.google.com/linux/earth/deb stable Release.gpg [819 B] Hit:7 http://security.ubuntu.com/ubuntu eoan-security InRelease Ign:6 http://dl.google.com/linux/earth/deb stable Release.gpg Reading package lists... Done W: GPG error: http://dl.google.com/linux/earth/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 78BD65473CB3BD13 E: The repository 'http://dl.google.com/linux/earth/deb stable Release' is not signed. 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. tom@tom-Lenovo-FLEX-6-11IGM:~$   my ignorance is nearly complete, but it appears to me that something may be lacking in the place where updates live - I am grateful for the assistance I get here.
29497
After I installed Ubuntu , I cannot update any software with the error message "failed to download package files". After having googled, I have tried:   sudo apt-get update sudo apt-get upgrade changed to another sources   But I still got the same error message. And there is no problem with internet connection as i can connect to internet using Firefox in Ubuntu.  Any ideas?
82983
when trying to update package listings via apt update or apt-get update I receive the following error:  E: Failed to fetch http://lt.archive.ubuntu.com/ubuntu/dists/xenial/universe/dep11/Components-amd64.yml.gz  Hash Sum mismatch E: Failed to fetch http://lt.archive.ubuntu.com/ubuntu/dists/xenial/universe/dep11/icons-64x64.tar  Writing more data than expected (7468511 &gt; 7467723) [IP: 193.219.61.87 80]   Is this somehow related to localised package distributor or is me all along? I am running beta2 release, that I've successfully installed and updated (without any error prompts) yesterday. Previously I used a 14.04 derivative which also did not bring up any errors. What can be the reason for this error?  EDIT: to duplicate markers, the topic name tackles a different problem rather than the hash sum problem, which is being referenced.
119482
I have a local mirror (created with debmirror), and when I run apt-get update after a few days, I get this:  E: Release file expired, ignoring file:/home/wena/.repo_bin/dists/sid/Release (invalid since 14h 31min 45s)   How do I work around that?
57855
I've been using Ubuntu(12.10) for a long time, and recently, my Ubuntu went through yet another update.  The whole update prompt showed up, following by a password prompt, and finally the good ol' progress bar...  Everything went well, and later on, I shut down my computer.  The next day, I turned my PC on, went to the login screen. I went ahead, and logged in, but after that, all I could see was a black screen, and my cursor!  I checked the forums, and got various tips, none of which worked...  Now I'm stuck with an Ubuntu installation that's completely useless.  One more thing:  I even tried logging in through Guest, but same problem! :\  My Computer Specs: Motherboard: Intel DG41WV Processor: Intel Core 2 Quad Q6600 @ 2.40GHz Graphics: Intel G41 Express Chipset RAM: Dual Channel, DDR3 2*2GB (4096 MBytes) HDD: Seagate 500GB SATA   ---- DETAILED INFO ----  To be a little more precise about my problem, after I log in, I can see a black screen and my cursor. Plus, importantly, I was able to see a login screen, hence I'm sure Ubuntu is rendering properly, and also pretty sure that there's no problem with the drivers (Otherwise I shouldn't even get a login screen, right?).  Anywho, another (probably) important thing is that, after logging in, I can hit Ctrl+Alt+1 and get up a recovery console.  The only thing that doesn't load is my actual GUI desktop  Then, I ran unity from the recovery console, it went through a few commands, got stuck at OpenGL for a few seconds, then zoomed throught many more lines of code, and ended up with this:  ERROR 2012-01-03 20.51.23 unity.launcher.Icon TrashLauncherIcon.cpp:62 Could not create file monitor for trash url: Operation not supported  *** glibc detected *** compiz: malloc(): memory corruption: 0x09c861d6 ***   After that. back at Ctrl+Alt+F7: Desktop Background + Cursor  So back to the terminal again, I had to hit Ctrl+C to get back again.  now, I typed unity again, and this was the output:  WARNING: no DISPLAY variable set, setting it to :D compiz (core) - Info: Loading plugin: core compiz (core) - Info: Starting plugin: core unity-panel-service: no process found   so now I did a sudo service lightdm restart :  X10: fatal IO error 4 (Interrupted system call) on X server ":0" after 131 requests (130 known processed) with 0 events remaining. lightdm stop/waiting lightdm start/running, process 2852   Im back at the login screen, and I login again, now Im back to black screen (Yes, I lost the Desktop Background as well)  So, once again, I try unity (same response as last time):  WARNING: no DISPLAY variable set, setting it to :D compiz (core) - Info: Loading plugin: core compiz (core) - Info: Starting plugin: core unity-panel-service: no process found   And still a black screen! :\
54551
I just installed a fresh version of Ubuntu 19.10 today, and the first thing I decided to do was to install GNU Screen, using sudo apt-get install screen. my output was: Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package screen  I figured the package archives were not quite updated as it was a clean install so I tried sudo apt-get update. This is what I got: Get:1 http://security.ubuntu.com/ubuntu eoan-security InRelease [97.5 kB]       Err:2 http://au.archive.ubuntu.com/ubuntu eoan InRelease   Cannot initiate the connection to au.archive.ubuntu.com:80 (2001:388:30bc:cafe::beef). - connect (101: Network is unreachable) Could not connect to au.archive.ubuntu.com:80 (202.158.214.106), connection timed out Err:3 http://au.archive.ubuntu.com/ubuntu eoan-updates InRelease      Cannot initiate the connection to au.archive.ubuntu.com:80 (2001:388:30bc:cafe::beef). - connect (101: Network is unreachable) Err:4 http://au.archive.ubuntu.com/ubuntu eoan-backports InRelease   Cannot initiate the connection to au.archive.ubuntu.com:80 (2001:388:30bc:cafe::beef). - connect (101: Network is unreachable) Fetched 97.5 kB in 31s (3,106 B/s) Reading package lists... Done Building dependency tree        Reading state information... Done All packages are up to date. W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/eoan/InRelease  Cannot initiate the connection to au.archive.ubuntu.com:80 (2001:388:30bc:cafe::beef). - connect (101: Network is unreachable) Could not connect to au.archive.ubuntu.com:80 (202.158.214.106), connection timed out W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/eoan-updates/InRelease  Cannot initiate the connection to au.archive.ubuntu.com:80 (2001:388:30bc:cafe::beef). - connect (101: Network is unreachable) W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/eoan-backports/InRelease  Cannot initiate the connection to au.archive.ubuntu.com:80 (2001:388:30bc:cafe::beef). - connect (101: Network is unreachable) W: Some index files failed to download. They have been ignored, or old ones used instead.  I'm really not sure why it would be doing this, other than maybe some first-use hiccups? The computer is definitely connected to the internet, as I am writing this from that machine, and I have tried running the commands after rebooting and it still gives the errors. I can't seem to be able to connect to au.archive.ubuntu.com at all. ping au.archive.ubuntu.com just sits there without a response. If anyone could help, that would be great! If any extra information is required I'd be happy to edit it into the question.
84798
Possible Duplicate:    I am using 10.04 LTS - Lucid Lynx. I shutdown the computer while a software update was running. Then after I restarted my computer and while the update manager was running, I got this error:  Could not download all repository indexes The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct. GPG error: http://toolbelt.herokuapp.com ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C927EBE00F1B0520 Failed to fetch  http://ppa.launchpad.net/rabbitvcs/ppa/ubuntu/dists/**DISTRIBUTION**/main/binary-i386/Packages.gz 404  Not Found   I went through the answers to  and I tried this $ sudo launchpad-getkeys  Please wait... launchpad-getkeys is running an update so it can detect the missing GPG keys Trying to import all the missing keys gpg: requesting key 0F1B0520 from hkp server keyserver.ubuntu.com gpgkeys: key C927EBE00F1B0520 not found on keyserver gpg: no valid OpenPGP data found. gpg: Total number processed: 0 launchpad-getkeys has finished importing all missing GPG keys.  Try running sudo apt-get update - you shouldn't see any key  errors anymore  But when I run sudo apt-get update again, it again shows that the key was not found on the keyserver. How to solve this problem?
41534
I'm trying to install programs/files from the getdeb repo but get a "check your internet connection" error.  Programs than I've tried include Qbittorrent and Mozilla-Plugin-VLC.    Through the terminal I get the following errors:  Err http://archive.getdeb.net/ubuntu/ natty-getdeb/apps qbittorrent amd64 2.8.2-1~getdeb2   Could not connect to archive.getdeb.net:80 (209.105.191.78). - connect (113: No route to host) E: Failed to fetch http://archive.getdeb.net/ubuntu/pool/apps/q/qbittorrent/qbittorrent_2.8.2-1~getdeb2_amd64.deb: Could not connect to archive.getdeb.net:80 (209.105.191.78). - connect (113: No route to host)   &amp;  Err http://archive.getdeb.net/ubuntu/ natty-getdeb/apps mozilla-plugin-vlc amd64 1.1.10-1~getdeb1   Could not connect to archive.getdeb.net:80 (209.105.191.78). - connect (113: No route to host) E: Failed to fetch http://archive.getdeb.net/ubuntu/pool/apps/v/vlc/mozilla-plugin-vlc_1.1.10-1~getdeb1_amd64.deb: Could not connect to archive.getdeb.net:80 (209.105.191.78). - connect (113: No route to host)   I'm not having any problems adding/removing other programs/files from my machine.  Is there a problem with GETDEB repo (and if so, is there any way to fix it on my end) or is there something wrong with my computer's configuration?
88578
Running sudo apt-get update on my AWS EC2 Ubuntu 18.04.01 LTS instance fails because my Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown when trying to access the deb.nodesource.com/node_10.x bionic Release  Here is the result after running sudo apt-get update  Hit:1 http://us-east-1.ec2.archive.ubuntu.com/ubuntu bionic InRelease Get:2 http://us-east-1.ec2.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB] Ign:3 https://deb.nodesource.com/node_10.x bionic InRelease Get:4 http://us-east-1.ec2.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB] Err:5 https://deb.nodesource.com/node_10.x bionic Release   Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown.  Could not handshake: Error in the certificate verification. [IP: XX.XXX.XX.XX 443] Get:6 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB] Reading package lists... Done W: https://deb.nodesource.com/node_10.x/dists/bionic/InRelease: No system certificates available. Try installing ca-certificates. W: https://deb.nodesource.com/node_10.x/dists/bionic/Release: No system certificates available. Try installing ca-certificates. E: The repository 'https://deb.nodesource.com/node_10.x bionic 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.   It seems like my current installation of Node.js is causing the problem.   I've tried installing and updating ca-certificates in etc/ssl/certs, however, this did not help. I'm not exactly sure how to proceed from here to resolve this issue.  I'm not looking for a quick workaround that would compromise the security of the server.   Thanks in advance!
47751
I've followed this tutorial to install Ubuntu 15.10:    After restarting my computer I got to the grub menu and chose Ubuntu. Shortly after that I got this error:  /run/lvm/lvmetad.socket: connect failed: No such file or directory WARNING: Failed to connect to lvmetad. Falling back to internal scanning.   These messages keep adding up on a black screen every second. After a while,  I get access to the initramfs ash console.  what am I doing wrong?
36090
I have recently installed ubuntu 11.10. But when i try to install a software it tries to 'updating cache' but after a while, it stops, showing:                            Failed to download repository information                           Check your internet connection   so, now i am totally unable to install any software in my ubuntu.  Please,let me know how to solve the problem.
33043
I am using Ubuntu 14.04.  I ran in terminal sudo apt-get update. Then I rebooted the system. And now I see:   ALERT! /dev/disk/by-uuid/xxxxxxxxx does not exist. Dropping to a shell initramfs:_   I can't boot up LIVE Ubuntu from USB flash drive. Yes, I double checked BIOS setup and the USB flash drive is OK and runs on another machine. Right now I am going to buy a  DVD and burn a Live DVD from another laptop.  sudo blkid gives me:   /dev/loop0: TYPE="squashfs"   /dev/sda1: UUID="xxxx" TYPE="ext4"    /dev/sr0: LABEL="Ubuntu 14.04.1 LTS i386" TYPE="iso960"      /etc/fstab has the same UUID="xxxx" and there is a line with:   errors=remount-ro 0      I tried using boot-repair but I still can't log in to Ubuntu.  I don't want to reinstall Ubuntu, because I have a lot of data there.  Do you have any advice how this can be solved?
26534
While upgrading to 14.04 using sudo do-release-upgrade my network connection was interrupted and several packages failed to upgrade.  Running do-release-upgrade again reported No new releases found but apt-get listed many packages "kept back", so it seemed the system was in an intermediate state. I ran apt-get dist-upgrade which installed those packages again, then apt-get autoremove after which apt seemed happy.  However, after restarting I cannot log in at the GUI prompt. After entering my password the error "Failed to start session" appears in red. I am still able to log in from the command prompt, but I don't know what to do to solve or debug the GUI log in failure.