I'm downloading an ISO image of Ubuntu 18.04 server AMD 64 bits from http://releases.ubuntu.com/bionic/

On that page two ISO images are found:

  1. http://releases.ubuntu.com/bionic/ubuntu-
  2. http://releases.ubuntu.com/bionic/ubuntu-18.04.1-live-server-amd64.iso

From that page, the file SHA256SUMS can be downloaded in order to check the integrity of the images.

The first one ( ) is listed in SHA256SUMS file, and its checksum is OK.The second one ( 18.04.1 ) isn't listed there.

On the other hand, if you download an ISO image directly from the main Ubuntu web page ( https://www.ubuntu.com/#download ), an automatic download of the second one ( 18.04.1 ) is started.

My questions are the following ones:

  1. Which is the latest release or 18.04.1 ?
  2. Where is the SHA256SUMS file containing the checksum of 18.04.1 release ?

Thanks for any clue.

  • Have you tried downloading both ISOs and comparing them (via cmp iso1 iso2 or something)? I would guess one is just a hard or symlink to the other (for whatever reason, maybe a bug). – PerlDuck Dec 29 '18 at 13:50
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    You are right ! I downloaded both and compared them with diff command. They are the same. Thanks ! – Romualdo Caruso Dec 29 '18 at 13:54
  • Hey, thank you answering and trying so quickly. I just wanted to try myself but given my current download speed it would take ~20 minutes. To be really, really sure, you could also do sha256sum iso1 iso2 and compare the checksums. – PerlDuck Dec 29 '18 at 13:57
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    Thank you to give me that clue. It should be great if maintainers of Ubuntu release page commented that 18.04.1 release is only a hard link to release in order to avoid confusion, or include both on SHA256SUMS file, so whatever image you download, checksum file contains it. – Romualdo Caruso Dec 29 '18 at 14:02

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