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first of all thanks for your help!I have a weird situation here. I am running several VMs on a ESXi white box and one of the Linux VMs started acting weirdly.

I cannot perform apt-get upgrade or any other install (docker container) as the installs always fail with "Hash Sum mismatch". If I try running simple "wget https://mirror.umd.edu/ubuntu-iso/20.04/ubuntu-20.04-live-server-amd64.iso" as a test the speeds is around ~30-1500KB/s. While for the apt-get upgrade the speed is relatively normal, but fails as well. LAN speed is fine and is around 100MB/s.

If I try doing the same thing in a different VM, using 18.04LTS as well, behaviour is completely normal. Installs go through, speed is around 25MB/s which is in line with the connection I have.

I have not performed any hardware changes or configuration changes in the ESXI or the Ubuntu VM. Doing the "tests" above tells me this is a software issue and not a hardware one.

I've tried googling around and performed with no results. sudo rm -rf /var/lib/apt/lists/* sudo apt-get update sudo apt-get upgrade

panda@box:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  linux-firmware
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 75.1 MB of archives.
After this operation, 10.2 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 linux-firmware all 1.173.18 [75.1 MB]
Err:1 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 linux-firmware all 1.173.18
  Hash Sum mismatch
  Hashes of expected file:
   - SHA256:099bbc0f958db43fad328f9f09065e448a85dcdb126691c2dab040213af13e41
   - SHA1:31b98ad6e6d2ca49e1a5297d9913d0be41f2a965 [weak]
   - MD5Sum:60b003009991844b6f8cd73bc185989a [weak]
   - Filesize:75056824 [weak]
  Hashes of received file:
   - SHA256:0c404bce54ff28a87300f0ba933726ea7bc7008cc1edd4b8586f2f93a5bab2e8
   - SHA1:d5d35d984788d6e25b10abdaf09f33614dd1fa72 [weak]
   - MD5Sum:94495275aa23904b065cb37185d35b8e [weak]
   - Filesize:75056824 [weak]
  Last modification reported: Wed, 06 May 2020 15:18:25 +0000
Fetched 75.1 MB in 6s (12.6 MB/s)
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.173.18_all.deb  Hash Sum mismatch
   Hashes of expected file:
    - SHA256:099bbc0f958db43fad328f9f09065e448a85dcdb126691c2dab040213af13e41
    - SHA1:31b98ad6e6d2ca49e1a5297d9913d0be41f2a965 [weak]
    - MD5Sum:60b003009991844b6f8cd73bc185989a [weak]
    - Filesize:75056824 [weak]
   Hashes of received file:
    - SHA256:0c404bce54ff28a87300f0ba933726ea7bc7008cc1edd4b8586f2f93a5bab2e8
    - SHA1:d5d35d984788d6e25b10abdaf09f33614dd1fa72 [weak]
    - MD5Sum:94495275aa23904b065cb37185d35b8e [weak]
    - Filesize:75056824 [weak]
   Last modification reported: Wed, 06 May 2020 15:18:25 +0000
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
Martin Madry
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  • Hash sum mismatch is a problem with the mirror you are using. Their files are time-inconsistent. I have a local mirror and this crops up occasionally for users of it, to fix it I refresh the mirror. As you are using someone else's mirror, you just have to wait for it to catch up. I see you have searched this site for other fixes that will tell you to clear caches, etc, but they never worked for me either. My local mirror draws from us.archive.ubuntu.com which is currently not having this problem, you could try pointing at that one. – Organic Marble May 10 '20 at 21:40
  • @OrganicMarble Unfortunately, that did not help. Still results in

    sudo apt-get update
    Get:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
    Get:2 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages [1,019 kB]
    Get:3 http://us.archive.ubuntu.com/ubuntu bionic/main Translation-en [516 kB]
    Get:4 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages [8,570 kB]
    Err:4 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages Hash Sum mismatch

     – Martin Madry May 11 '20 at 05:56
  • So I manually installed the package, that was throwing errors. Downloading the file on a different VM (running on same hardware), uploading it throughWinSCP and then sing sudo dpkg -i /path/to/deb/file

    However it still has not resolved the speed issues. Running speedtest in cli results in very subpar results compared to a different Ubuntu system on the same ESXi host.

     – Martin Madry May 11 '20 at 16:53
  • That's interesting. I get wildly different results with speedtest-cli and ookla's own website. Especially on the upload. Frankly it seems like the website test is more accurate. But I get you are comparing apples to apples. – Organic Marble May 11 '20 at 17:05
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    @OrganicMarble it ended up being a wrong cable, or at least it seems like it now, that i have replaced it.. How it could affect only VM is beyond me.

    Thanks for help!

     – Martin Madry May 12 '20 at 08:11
  • Does this answer your question? What is correct way to fix name resolution from Docker container? – Henke - Нава́льный П с м Nov 02 '20 at 18:22
  • Does this answer your question? Trouble downloading packages list due to a "Hash sum mismatch" error – karel Nov 02 '20 at 22:33

0 Answers0