Create ISO from Linux image with verify

Question

Ive been having problems doing a Ubuntu install (ubuntu 18.10 optimus dual boot hang on first boot (Dell 7567 )) and think it may be the USB stick was not written properly. How can I write and verify the image (was using windows to do this but do have another Linux box I can use to make the USB). I know there is a verify in the installation menu but would rather do it manualy (i.e. with CLI).

score 1 · Accepted Answer · edited Apr 09 '19 at 22:21

1

For that purpose USB has a file md5sum.txt

Plug in the USB drive in any Linux OS.
CD to USB drive
```
cd /media/$USER/<drive name>
```

Run

md5sum -c md5sum.txt | grep -v OK || echo "All OK"

If there is a defect, output is something like

md5sum: WARNING: 1 computed checksum did NOT match

If not

All OK

No output means all OK.

For full report run

md5sum -c md5sum.txt

edited Apr 09 '19 at 22:21

pomsky

68,507

answered Apr 09 '19 at 16:54

Vijay

8,056

So this means that is is both downloaded and copied to USB without errors? – Ben Edwards Apr 09 '19 at 20:03
Yes it does mean that. – Vijay Apr 09 '19 at 20:58

Create ISO from Linux image with verify

1 Answers1