When I run sudo apt-get update &amp;&amp; sudo apt-get -y upgrade command in my Ubuntu18.04 system.
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When updating, I get the following error message:   W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/ubuntu xenial Release' does not have a Release file.   Here, I find another statement on this error:   This recommends removing certain PPAs; and, I'm not sure if I should do that since it might mean not getting the updates that I need.    Is this what I should do?
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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
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I'be been running 18.04 since a clean SSD install on the day of it's official release, without issues. Power on to login was seconds (max 10)  Then, I did a regular upgrade this morning:  $ sudo apt update &amp;&amp; sudo apt dist-upgrade   The packages installed/upgraded were:  Install: linux-headers-4.15.0-24:amd64 (4.15.0-24.26, automatic), linux-headers-4.15.0-24-generic:amd64 (4.15.0-24.26, automatic), linux-modules-extra-4.15.0-24-generic:amd64 (4.15.0-24.26, automatic), linux-modules-4.15.0-24-generic:amd64 (4.15.0-24.26, automatic), linux-image-4.15.0-24-generic:amd64 (4.15.0-24.26, automatic) Upgrade: gnome-control-center-data:amd64 (1:3.28.1-0ubuntu1.18.04.1, 1:3.28.1-0ubuntu1.18.04.2), linux-headers-generic:amd64 (4.15.0.23.25, 4.15.0.24.26), gnome-control-center:amd64 (1:3.28.1-0ubuntu1.18.04.1, 1:3.28.1-0ubuntu1.18.04.2), linux-image-generic:amd64 (4.15.0.23.25, 4.15.0.24.26), linux-signed-generic:amd64 (4.15.0.23.25, 4.15.0.24.26), gnome-control-center-faces:amd64 (1:3.28.1-0ubuntu1.18.04.1, 1:3.28.1-0ubuntu1.18.04.2), linux-generic:amd64 (4.15.0.23.25, 4.15.0.24.26)   I rebooted once the upgrade had completed, and noted a 2-3 minute delay on the Ubuntu loading/splash screen (prior to login) (without any progress/activity indicated on the dots).  I powered off and tried to boot again, but am getting this delay consistently now. Also close down is much slower too.  Update #1 (2018-07-03): Analysis on systemd:  $ sudo systemd-analyze blame 3min 53.073s plymouth-quit-wait.service     2min 20.699s snapd.seeded.service          49.949s snapd.service           6.186s NetworkManager-wait-online.service           1.148s dev-sda2.device           1.098s plymouth-start.service   Showing that plymouth-quit-wait.service (which I now believe is related to the Ubuntu loading/splash screen) and snapd.seeded.service were by far the longest running services to initiate. So I compared the times before the dist-upgrade and after:  $ journalctl -u plymouth-quit-wait.service --since today -- Logs begin at Fri 2018-04-27 13:01:30 BST, end at Tue 2018-07-03 12:38:05 BST. -- Jul 03 04:15:43 user-laptop systemd[1]: Starting Hold until boot process finishes up... Jul 03 04:15:46 user-laptop systemd[1]: Started Hold until boot process finishes up. -- Reboot -- Jul 03 04:21:17 user-laptop systemd[1]: Starting Hold until boot process finishes up... Jul 03 04:24:52 user-laptop systemd[1]: Started Hold until boot process finishes up.   Before the upgrade plymouth-quit-wait.service took 3 seconds. After the upgrade it took 3 minutes 35 seconds  $ journalctl -u snapd.seeded.service --since today -- Logs begin at Fri 2018-04-27 13:01:30 BST, end at Tue 2018-07-03 12:42:14 BST. -- Jul 03 04:15:43 user-laptop systemd[1]: Starting Wait until snapd is fully seeded... Jul 03 04:15:43 user-laptop systemd[1]: Started Wait until snapd is fully seeded. -- Reboot -- Jul 03 04:22:47 user-laptop systemd[1]: Starting Wait until snapd is fully seeded... Jul 03 04:24:49 user-laptop systemd[1]: Started Wait until snapd is fully seeded.   Before the upgrade snapd.seeded.service took 0 seconds. After the upgrade it took 2 minutes 2 seconds.  Update #2 (2018-07-06): This morning's boot saw the return of the delay. So I guess we're still waiting for the kernel/plymouth/snapd update.  Update #3 (2018-07-12): The problem seems to be resolved, but I didn't see any update to snap or plymouth, and I'm still running 4.15.0-24 kernel. So I'm not sure which package update fixed the problem, or if it just resolved itself somehow. Reading the bug updates on launchpad it's unclear to me what was done (or is being done) to what package/s. If anyone can clarify that would be very useful.
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I am trying to upgrade to a new Ubuntu version but the update manager does not recognize an update. Why not?
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When I run sudo apt update in Ubuntu 18.10 I get this error message:  E: flAbsPath on /var/lib/dpkg/status failed - realpath (2: No such file or directory) E: Could not open file  - open (2: No such file or directory) E: Problem opening  E: The package lists or status file could not be parsed or opened.   After running sudo cp /var/lib/dpkg/status-old /var/lib/dpkg/status it's showing this error message:   cp: cannot stat '/var/lib/dpkg/status-old': No such file or directory
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I've just set up a new machine with Ubuntu Oneiric 11.10 and then run  apt-get update apt-get upgrade apt-get install git   Now if I run git --version it tells me I have git version 1.7.5.4 but on my local machine I have the much newer git version 1.7.9.2  I know I can install from source to get the newest version, but I thought that it was a good idea to use the package manager as much as possible to keep everything standardized.  So is it possible to use apt-get to get a newer version of git, and what is the right way to do it?
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When I do upgrade it gets stuck here:  user@plato:~# sudo apt-get upgrade Reading package lists... Done Building dependency tree        Reading state information... Done Calculating upgrade... Done The following packages will be upgraded:   bind9-host coreutils cpio curl dnsutils libbind9-90 libc-bin libc-dev-bin   libc6 libc6-dev libcgmanager0 libcurl3 libcurl3-gnutls libdns100   libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 libisc95 libisccc90   libisccfg90 libjasper1 liblwres90 libplymouth2 libsepol1 libssl-dev   libssl-doc libssl1.0.0 linux-libc-dev mime-support multiarch-support ntp   ntpdate openssl plymouth plymouth-theme-ubuntu-text python3-distupgrade   ubuntu-release-upgrader-core unzip 39 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 16.0 MB of archives. After this operation, 12.3 kB of additional disk space will be used. Do you want to continue? [Y/n] y 0% [Connecting to us.archive.ubuntu.com (2001:67c:1562::15)] ░   When I do update it gets stuck here:  user@plato:~# apt-get update 0% [Connecting to us.archive.ubuntu.com (2001:67c:1562::14)] [Connecting to sec░   I'm able to ping us.archive.ubuntu.com just fine:  user@plato:~# ping us.archive.ubuntu.com PING us.archive.ubuntu.com (91.189.91.23) 56(84) bytes of data. 64 bytes from economy.canonical.com (91.189.91.23): icmp_seq=1 ttl=54 time=81.5 ms 64 bytes from economy.canonical.com (91.189.91.23): icmp_seq=2 ttl=54 time=81.5 ms 64 bytes from economy.canonical.com (91.189.91.23): icmp_seq=3 ttl=54 time=81.5 ms 64 bytes from economy.canonical.com (91.189.91.23): icmp_seq=4 ttl=54 time=81.4 ms ^C --- us.archive.ubuntu.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 81.425/81.528/81.582/0.355 ms   What can i do to fix this?    What I have tried so far.  I've tried following directions on this blog:   To force apt-get to use IPv4 exclusively   Create a file in /etc/apt/apt.conf.d/99force-ipv4 Add this line to newly created file Acquire::ForceIPv4 false; Apt-get will now use IPv4 exclusively
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I know that there are three command to update and then upgrade the whole system, these are:        sudo apt-get update        # Fetches the list of available updates   sudo apt-get upgrade       # Strictly upgrades the current packages   sudo apt-get dist-upgrade  # Installs updates (new ones)      Is there a super-upgrade command that combines all these commands to one?
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I usually use apt-get update &amp;&amp; apt-get upgrade to run my updates and upgrades instead of the GUI because it seems to run more quickly.   However, I've noticed lately that I often get a message that one of my upgrades was held back. I then usually run dist-upgrade to run it through and it works fine. As far as I can tell after reading  and its answers, dist-upgrade does all the same things and then some.   So, my question is: Why use apt-get upgrade at all? Why not use apt-get dist-upgrade all the time? Why does apt-get upgrade even exist?
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I'm pretty new to running linux, but I know that 19.04 was released today and I wanted to upgrade from my current 18.10. However, when I follow the release notes here:  I get the message "The software on this computer is up to date". I made sure that my update settings are set to "any new version" and "normal" in the /etc/update-manager/release-upgrades file.   What am I doing wrong?  Thanks for the help!  Side note: I had to disable this PPA:  because it would cause errors in apt updating. Do I need to re-add it? If so how do I do so without it giving me an error?  Edit: I have followed the procedure recommended in the documentation which is identical to the suggested duplicate, but I am not given the option to upgrade. I have not yet tried the   do-release-upgrade -d    option as I don't want to upgrade to the developer version.
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I normally use Software Updater to keep the system updated. However I occasionally will run apt-get upgrade from the terminal and I've notice there are times when Software Updater says there are no available updates but apt-get update shows some updates to packages.  I haven't been able to figure out why.
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How can I programmatically/script disable apt unattended upgrades? Running Ubuntu 16.04.
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I have accidentally removed apt-get, how do I reinstall it?  $ sudo apt-get update sudo: apt-get: command not found  $ sudo dpkg-reconfigure apt /usr/sbin/dpkg-reconfigure: apt is broken or not fully installed    I would like to mention I do not want to reinstall Linux!
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How do you stop all interactive prompts from apt-get when installing or upgrading packages?  I'm trying to write a non-interactive script to install packages on servers, whenever an upgrade requires installing a new kernel, apt-get always ignores the -y option and prompts me on what option to take to update grub.lst. I always want to install the package maintainer's version. How do I disable this prompt?
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I typed:  sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/ jdk1.8.0/bin/java" 1   It's says alternatives --install needs link name path priority
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I always see commands like this  apt-get -y install    What is the -y tag for and what is the difference between apt-get install with and without the -y tag?
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When running apt-get -y install &lt;packages ...&gt; on Ubuntu 10.04 I would like apt-get (or aptitude if that makes it easier) to not prompt me when installing additional dependencies (behavior of -y as I understand it) and but not prompt me about overwriting configuration files, instead assume to keep the existing ones always (which is usually the default). Unfortunately --trivial-only seems to be the inverse of -y and not affect the prompt that is shown, according to the man page.  In particular packages auch as samba, nullmailer, localepurge and lighttpd have forced me to interact with the terminal, even though the whole procedure was scripted and meant to be non-interactive.