# (Solved) Mistake in md5sum.txt file?
**URL:** https://support.blue-systems.com/t/solved-mistake-in-md5sum-txt-file/3534
**Category:** Netrunner 14.x
**Created:** [November 17, 2015, 12:54pm UTC](https://support.blue-systems.com/t/solved-mistake-in-md5sum-txt-file/3534 "2015-11-17T12:54:47Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Auronius](https://support.blue-systems.com/u/Auronius)
#### Post date: [November 17, 2015, 12:54pm UTC](https://support.blue-systems.com/t/solved-mistake-in-md5sum-txt-file/3534/1 "2015-11-17T12:54:47Z")
Good day!
I created two USB flash drives and 1 DVD with netrunner-14.2-dvd-64bit.iso.
USB flash drives were created using sudo dd if= of=/dev/sdb bs=4M; sync command.
When I checked them using md5sum.txt there was a checksum mismatch in one file! That was in all of created media.
[attachment=799]
[attachment=801]
[attachment=802]
But when I checked written ISO using dd, it showed, that ISO-s were written correctly…
[attachment=803]
So is it a mistake in md5sum.txt file or iso-s are bad?
Can I use my created USB sticks and DVD safely?
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### Author:  [@leszek](https://support.blue-systems.com/u/leszek)
#### Post date: [November 17, 2015, 1:08pm UTC](https://support.blue-systems.com/t/solved-mistake-in-md5sum-txt-file/3534/2 "2015-11-17T13:08:52Z")
Yes you can if the md5sum of the iso is correct.
As for the md5sum text inside the ISO it might be incorrect as there is a bug creating that file after the bootloader file is written or updated.
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### Author:  [@Auronius](https://support.blue-systems.com/u/Auronius)
#### Post date: [November 17, 2015, 3:22pm UTC](https://support.blue-systems.com/t/solved-mistake-in-md5sum-txt-file/3534/3 "2015-11-17T15:22:43Z")
Thank you!
That checksum mismatch made me nervous :s