Comment 3 for bug 1851005

Thank you for taking the time to report this issue and helping to make Ubuntu better.

This package failure looks like it was caused by corrupted install media, or device failure. eg. look in the logs and you'll see messages like these :-

Nov 2 05:24:02 ubuntu kernel: [ 193.705726] SQUASHFS error: zlib decompression failed, data probably corrupt
Nov 2 05:24:02 ubuntu kernel: [ 193.705730] SQUASHFS error: squashfs_read_data failed to read block 0x1c5ad515

Examining the information you have given us, this does not appear to be a useful bug report so I am closing it, as it appears to be a faulty device (or bad write-to-device). If you believe I'm in error, please leave a comment explaining why and change the status back to 'New'. I suggest you verify your ISO download, and use the 'check disc for defects' option to validate your media before install to ensure a good download & write.

Possible useful : https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu#0 and https://help.ubuntu.com/community/Installation/CDIntegrityCheck

You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org, or for more support options please look at https://discourse.ubuntu.com/t/community-support/709