Comment 2 for bug 1886190

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

This installation looks like it was caused by a corrupted file system, or device problems (sda1). I notice in the logs

Jul 3 11:38:17 ubuntu kernel: [ 798.770983] EXT4-fs warning (device sdb8): ext4_end_bio:323: I/O error 10 writing to inode 412691 (offset 0 size 233472 starting block 30865657)
Jul 3 11:38:17 ubuntu kernel: [ 798.770986] Buffer I/O error on device sdb8, logical block 427968
Jul 3 11:38:17 ubuntu kernel: [ 798.770992] Buffer I/O error on device sdb8, logical block 427969
Jul 3 11:38:17 ubuntu kernel: [ 798.770994] Buffer I/O error on device sdb8, logical block 427970
Jul 3 11:38:17 ubuntu kernel: [ 798.770996] Buffer I/O error on device sdb8, logical block 427971
Jul 3 11:38:17 ubuntu kernel: [ 798.770997] Buffer I/O error on device sdb8, logical block 427972
Jul 3 11:38:17 ubuntu kernel: [ 798.770999] Buffer I/O error on device sdb8, logical block 427973
Jul 3 11:38:17 ubuntu kernel: [ 798.771001] Buffer I/O error on device sdb8, logical block 427974
Jul 3 11:38:17 ubuntu kernel: [ 798.771003] Buffer I/O error on device sdb8, logical block 427975
Jul 3 11:38:17 ubuntu kernel: [ 798.771005] Buffer I/O error on device sdb8, logical block 427976
Jul 3 11:38:17 ubuntu kernel: [ 798.771006] Buffer I/O error on device sdb8, logical block 427977
Jul 3 11:38:17 ubuntu kernel: [ 798.771526] EXT4-fs warning (device sdb8): ext4_end_bio:323: I/O error 10 writing to inode 412692 (offset 0 size 4198400 starting block 30866176)
Jul 3 11:38:17 ubuntu kernel: [ 798.772242] EXT4-fs warning (device sdb8): ext4_end_bio:323: I/O error 10 writing to inode 412692 (offset 0 size 6295552 starting block 30866688)
Jul 3 11:38:17 ubuntu kernel: [ 798.773577] EXT4-fs warning (device sdb8): ext4_end_bio:323: I/O error 10 writing to inode 412692 (offset 0 size 8388608 starting block 30867200)
..
Jul 3 11:39:16 ubuntu in-target: : Problem unlinking the file /var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_bionic_universe_binary-i386_Packages - PrepareFiles (30: Read-only file system)

I've marked this bug as incomplete (due hardware issues), if you believe I'm in error please leave a comment as to why, and you can return the status to "New".

I suggest you validate the health of your hardware (esp. disk by checking it's SMART status using `smartctl`, `gnome-disks` or whichever tool you prefer), and possibly the integrity of your partition table (https://help.ubuntu.com/community/Smartmontools). If you're unfamiliar with these, I suggest seeking looking up refer to https://discourse.ubuntu.com/t/finding-help/709