I was trying to install this fresh build ubuntu 20.04 LTS through a usb drive created

[Pankaj Kumar Mondal]

The installation started and at last it gave me the crashed error.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckMismatches: ./casper/filesystem.squashfs
CasperMD5CheckResult: fail
CasperVersion: 1.445
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 5 04:04:59 2022
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 LANGUAGE=en_IN
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

From the bug description:

CasperMD5CheckMismatches: ./casper/filesystem.squashfs
CasperMD5CheckResult: fail

It's possible you had a bad write to your installation media or for some other reason its contents could not be read correctly. If you're still having problems you should try re-writing the image to your media (and may be re-download it too).

By the way, you're installing from the original 20.04 release ISO which will have a lot of updates to download and install after the installation process is complete. The latest ISO (20.04.4) can be found at https://ubuntu.com/#download. It was released very recently so will have very few updates to install after installation.

[Pankaj Kumar Mondal (pankajkumarkbn)]

Thanks Paul.

I downloaded the Ubuntu 20.04.4 LTS again from the official website and made a bootable USB using rufus which actually worked with Secure Boot turned off on UEFI and writing this comment from the fresh build.

Earlier I tried Universal USB installer and balenaEtcher but nether of them worked.

[Paul White (paulw2u)]

Excellent Pankaj! I'm glad you managed to install Ubuntu successfully. I'll close this as "Invalid" as you didn't actually encounter a bug in the installer.