Thank you for reporting this bug to Ubuntu. Ubuntu 20.10 (groovy) reached end-of-life on July 22, 2021.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please re-report the issue using `ubuntu-bug`. ** Changed in: apt (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1939665 Title: "apt-get update" fails if another instance is running Status in apt package in Ubuntu: Triaged Bug description: This snippet: sudo apt-get update & sudo apt-get update & wait; wait will result in one apt-get run succeeding and the other failing on the lock: [1] 3006473 [2] 3006474 Hit:1 http://ports.ubuntu.com/ubuntu-ports groovy InRelease Hit:2 http://ports.ubuntu.com/ubuntu-ports groovy-backports InRelease Hit:3 http://ports.ubuntu.com/ubuntu-ports groovy-security InRelease Hit:4 http://ports.ubuntu.com/ubuntu-ports groovy-updates InRelease Reading package lists... Done E: Could not get lock /var/lib/apt/lists/lock. It is held by process 3006476 (apt-get) N: Be aware that removing the lock file is not a solution and may break your system. E: Unable to lock directory /var/lib/apt/lists/ Reading package lists... Done [1]- Done sudo apt-get update [2]+ Exit 100 sudo apt-get update Note that apt-get upgrade will correctly wait. ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: apt 2.1.10ubuntu0.3 ProcVersionSignature: Ubuntu 5.8.0-48.54-generic 5.8.18 Uname: Linux 5.8.0-48-generic aarch64 ApportVersion: 2.20.11-0ubuntu50.7 Architecture: arm64 CasperMD5CheckResult: skip Date: Thu Aug 12 07:50:16 2021 ProcEnviron: LC_TIME=C.UTF-8 TERM=xterm-256color PATH=(custom, no user) LANG=C.UTF-8 SHELL=/bin/bash SourcePackage: apt UpgradeStatus: Upgraded to groovy on 2021-03-25 (139 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1939665/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp