Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

Checking ISO file inegrity after installing?


  • Please log in to reply
16 replies to this topic

#1 auto1571

auto1571

  • Members
  • 321 posts
  • ONLINE
  •  
  • Gender:Male
  • Local time:06:04 PM

Posted 06 June 2017 - 04:39 PM

Hi guys, I forgot to check the file integrity of a Linux Mint ISO before install it on a computing device. I just wanted to ask how I would go about checking it now since it's already installed?



BC AdBot (Login to Remove)

 


#2 Al1000

Al1000

  • Global Moderator
  • 7,875 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Scotland
  • Local time:03:04 AM

Posted 06 June 2017 - 04:43 PM

Do you still have the ISO file?

#3 auto1571

auto1571
  • Topic Starter

  • Members
  • 321 posts
  • ONLINE
  •  
  • Gender:Male
  • Local time:06:04 PM

Posted 06 June 2017 - 04:50 PM

Only saved on the Disc which I installed if from.



#4 auto1571

auto1571
  • Topic Starter

  • Members
  • 321 posts
  • ONLINE
  •  
  • Gender:Male
  • Local time:06:04 PM

Posted 06 June 2017 - 05:11 PM

Update: I have just ran LMD and Rkhunter on it. LMD did not find any threats and RKhunter didn't find anything I would say is suspicious. Although I don't understand this line: "Warning: The command '/usr/sbin/adduser' has been replaced by a script:" I did run sudo apt upgrade earlier and so I am assuming that was caused by me.


Edited by auto1571, 06 June 2017 - 05:11 PM.


#5 NickAu

NickAu

    Bleepin' Fish Doctor


  • Moderator
  • 13,372 posts
  • ONLINE
  •  
  • Gender:Male
  • Location:127.0.0.1 Australia
  • Local time:12:04 PM

Posted 06 June 2017 - 06:08 PM

 

I did run sudo apt upgrade earlier and so I am assuming that was caused by me.

Yes, Rkhunter can be funny like that



#6 Al1000

Al1000

  • Global Moderator
  • 7,875 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Scotland
  • Local time:03:04 AM

Posted 07 June 2017 - 04:31 AM

As far as I know, you have to have the original ISO file to be able to check it.

#7 synergy513

synergy513

  • BC Advisor
  • 1,065 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Florida
  • Local time:09:04 PM

Posted 07 June 2017 - 01:01 PM

i remember reading about this a few weeks ago, keyword:checksum

 

https://www.howtogeek.com/246332/how-to-verify-a-downloaded-linux-iso-file-wasnt-tampered-with/

 

pulled up from google search "iso checksum" and looked like the best return


Edited by synergy513, 07 June 2017 - 01:05 PM.

Moore's Law : 4d Graph in Progress


#8 auto1571

auto1571
  • Topic Starter

  • Members
  • 321 posts
  • ONLINE
  •  
  • Gender:Male
  • Local time:06:04 PM

Posted 07 June 2017 - 04:51 PM

As far as I know, you have to have the original ISO file to be able to check it.

 

The Md5 sums are on the disc from which the ISO was burned to.



#9 Al1000

Al1000

  • Global Moderator
  • 7,875 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Scotland
  • Local time:03:04 AM

Posted 08 June 2017 - 12:43 AM

The md5sum number is easy enough to source; what you are missing is the original ISO against which to check the number.

#10 auto1571

auto1571
  • Topic Starter

  • Members
  • 321 posts
  • ONLINE
  •  
  • Gender:Male
  • Local time:06:04 PM

Posted 08 June 2017 - 09:43 AM

The md5sum number is easy enough to source; what you are missing is the original ISO against which to check the number.

Okay but based on the additional scans I have done and not finding any backdoor ports then wouldn't you say the system is fine? I really don't want to have to re-install another system lol.



#11 Al1000

Al1000

  • Global Moderator
  • 7,875 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Scotland
  • Local time:03:04 AM

Posted 08 June 2017 - 09:51 AM

I see no reason to believe that the system isn't fine. :)

I searched Google for the warning message you received, and this was one of the first results:

https://sourceforge.net/p/rkhunter/mailman/message/34949986/

That's a clear indication that the warning is just a false positive.

#12 pcpunk

pcpunk

  • Members
  • 5,977 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Florida
  • Local time:10:04 PM

Posted 10 June 2017 - 11:42 AM

Only saved on the Disc which I installed if from.

Not sure what you mean by this?  You don't normally save it to disk, if you did you would have had to then Cut and Paste it back to the computer you were trying to create the bootable medium from.  

 

Can you provide the EXACT Link used to obtain the iso?

 

What tool did you use to create the DVD, basically what procedure exactly?

 

Normally you would download the iso, and then Right Click on the iso after, and Select to "Burn Image" to DVD.  In most situations you would not download it to the DVD.

 

EDIT: I don't really know if this is still present in 16.04

You can always do an Integrity on the DVD also.  Use Installation CD Integrity Check to do this.  Please report back Exactly what you see when you do this, take some notes, they will be short but take notes.  The Verification is kinda weird to interpret and I've only done it a few times over the years, but have a good idea of what you should see.  And, it won't take long just so you know, just a few minutes if memory serves me right.  No more than ten minutes I would say.

 

For instance, if the Integrity is good, you may not see anything, the program will just end and tell you to Restart or Eject Medium.  

 

You may also see some Errors, this one is clear.

 

The system may stall out also, this may indicate a fail also, Notes Notes Notes LOL.

 

Have you looked in your Downloads, or other areas that you may have Downloaded it to by accident?  Do a search in File Explorer or File Manger.


Edited by pcpunk, 10 June 2017 - 12:00 PM.

sBCcBvM.png

Created by Mike_Walsh

 

KDE, Ruler of all Distro's

eps2.4_m4ster-s1ave.aes_pcpunk_leavemehere

 


#13 NickAu

NickAu

    Bleepin' Fish Doctor


  • Moderator
  • 13,372 posts
  • ONLINE
  •  
  • Gender:Male
  • Location:127.0.0.1 Australia
  • Local time:12:04 PM

Posted 10 June 2017 - 05:07 PM

 

Not sure what you mean by this?  You don't normally save it to disk,

Where do you normaly save stuff to? An Iso can be saved to hard disk before its burned to media of choice.

 

Your ISO is fine I wouldnt wory about it.


Edited by NickAu, 10 June 2017 - 05:08 PM.


#14 pcpunk

pcpunk

  • Members
  • 5,977 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Florida
  • Local time:10:04 PM

Posted 10 June 2017 - 05:11 PM

Only saved on the Disc which I installed if from.

It seemed to me auto was talking about a DVD, which he "installed from"? but not really sure?  Primarily because there was no iso to check so this made the most sense to me.

 

Refer to Post #2 and #3


Edited by pcpunk, 11 June 2017 - 10:46 AM.

sBCcBvM.png

Created by Mike_Walsh

 

KDE, Ruler of all Distro's

eps2.4_m4ster-s1ave.aes_pcpunk_leavemehere

 


#15 auto1571

auto1571
  • Topic Starter

  • Members
  • 321 posts
  • ONLINE
  •  
  • Gender:Male
  • Local time:06:04 PM

Posted 11 June 2017 - 05:25 PM

I burned the ISO to a blank DVD to able to install it from. However all integrity checks have been done now and everything seems to be running just fine.

 

Thanks for your help guys. :)






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users