while the copying files downloading its stops

[Ahmed Maytham]

..

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.15
ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
Uname: Linux 5.4.0-42-generic i686
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: i386
CasperVersion: 1.394.3
Date: Mon Mar 20 10:21:59 2023
InstallCmdLine: file=/cdrom/preseed/lubuntu.seed boot=casper only-ubiquity cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid initrd=/casper/initrd quiet splash --- BOOT_IMAGE=/casper/vmlinuz
LiveMediaBuild: Lubuntu 18.04.5 LTS "Bionic Beaver" - Release i386 (20200806.1)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Guiver (guiverc)]

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

This package failure was due to problems with your installation media, and subsequent squashfs errors encountered reading data from it, eg. look in the logs and you'll see messages like these :-

Mar 20 07:21:25 lubuntu kernel: [ 274.178022] SQUASHFS error: zlib decompression failed, data probably corrupt
Mar 20 07:21:25 lubuntu kernel: [ 274.178030] SQUASHFS error: squashfs_read_data failed to read block 0x33ad7d5f
Mar 20 07:21:25 lubuntu kernel: [ 274.178049] SQUASHFS error: zlib decompression failed, data probably corrupt
Mar 20 07:21:25 lubuntu kernel: [ 274.178052] SQUASHFS error: squashfs_read_data failed to read block 0x33ad7d5f

Usually this means an invalid ISO, or a bad write to your install media, usually detected during the ISO validation (prior to write; https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu#0) or the CasperMD5CheckResult which actually passed in your case. Problems can also occur if using a VM with insufficient RAM supplied.

[Chris Guiver (guiverc)]

Do note Lubuntu 18.04 LTS is EOL (see https://lubuntu.me/bionic-eol/) and has no upgrade path without re-install.

Also 18.04 support ends next month for 18.04 unless ESM or Pro is added to your system, but that is not available for i386 architecture (support ends April 2023)

For more details on ESM/Pro please read https://ubuntu.com/blog/18-04-end-of-standard-support (Ubuntu Pro is only available for x86-64 and arm64 architectures).