Problem with download

Dark_Sniper* · 07-22-2005, 08:43 PM

ok well im going to try and do this and learn. I heard that you need the iso file and also themd5sum file. Heres my problem i dont see the md5sum file at all and they told me that i need both then check the sum of both if they are the same them im good to go. But i dont see this file at all it says done but nothing.

michaelsanford · 07-22-2005, 10:01 PM

Where are you trying to download it from (please provide the exact link or page) ?

Sometimes developers will make files like my_linux_1.iso in a top directory but put the md5sum in a subfolder called /sums/, or even in another folder alltogether, or they'll name the file my_linux_1.iso.txt or something.

Silly I know...

Dark_Sniper* · 07-22-2005, 10:08 PM

well this is what i see ok ftp://anduin.linuxfromscratch.org/is...6-6.1-2.md5sum

and its from the LFS site ftp://anduin.linuxfromscratch.org/isos/

sorry i forgot to post this.

michaelsanford · 07-22-2005, 11:17 PM

Ok. Well they're both there. I'll assume then that you need an explaination of what an MD5 Sum is

You'll download the ISO files as well as the corresponding .md5sum files. I assume you'll be getting lfslivecd-x86-6.1-1.iso and lfslivecd-x86-6.1-2.iso ?

So, once those are downloaded you want to check the file to make sure it wasn't corrupted in transport or tampered with. To do this the developer has already made an MD5 checksum of the file at their end and posted it on the site, that's what that file is.

What is MD5?

Quote:

The MD5 algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given prespecified target message digest. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA.

What this means is that it looks at every bit in the file and makes a hash of that file. If the file is subsequently altered in any way the MD5 checksum will change.

So, once you download the files, you'd then issue the following command, and should get a result like the one in bold:

Code:

/usr/bin/md5sum lfslivecd-x86-6.1*.iso
8144a30d4b408996315c549db3eedbd7 lfslivecd-x86-6.1-1.iso
80e2f57567ac8b322bef143b218c5064  lfslivecd-x86-6.1-2.iso

If the numbers you get from the local md5sum match what's in the two .md5sum files you downloaded, you're good to go. If they are NOT the same, you should re-download the file becasue it have have become corrupted in transport.

Dark_Sniper* · 07-22-2005, 11:23 PM

ok thank you know i get what i need to understand what that was im under windows so under my firefox this is waht i see the line.

80e2f57567ac8b322bef143b218c5064 lfslivecd-x86-6.1-2.iso

and you said that to check the numbers how do i do that all i see when i click on the iso. file icon is lfslivecd-x86-6.1-2iso

michaelsanford · 07-22-2005, 11:25 PM

You'll need a utility to verify the md5 checksum in Windows itself. There are soom tools out there but i don't use them. Check google and versiontracker.com I'm sure you'll find something.

Dark_Sniper* · 07-22-2005, 11:33 PM

sweet i did i got fastsum and the numbers matcheed see i didnt understand what was taht number for. SO know i how i have to burner the iso but can you give me a little info as to put happens when i put this in a computer. And also what are the spec needed to run this i couldnt find nothing on ther website.

michaelsanford · 07-22-2005, 11:44 PM

I don't even know what this app is so I can't give you specs. There are also guides in the Answers section on how to burn and install ISOs from Windows, check 'em out

Dark_Sniper* · 07-22-2005, 11:47 PM

oh no dude i know how to burner a cd my question is. "whats the lowest computer spec that lfs will allow to use." 2nd question what willl i like see when i boot this livecd. 3rd question how will i do this lol i mean how is it that i program this lfs i go the book but i waht to know a little insite seens you know a little.

kjordan · 07-22-2005, 11:56 PM

Quote:

Originally posted by Dark_Sniper*
oh no dude i know how to burner a cd my question is. "whats the lowest computer spec that lfs will allow to use."

It will run on any computer. What you install in BLFS (as in desktop and stuff) will depend on your speed though.

Quote:

2nd question what willl i like see when i boot this livecd.

Well, it will boot to a console login where instructions to enter will be displayed. You can then set up X with "X -configure" and copy that to /etc/X11 and do a startx which will give you a GUI.

Quote:

3rd question how will i do this lol i mean how is it that i program this lfs i go the book but i waht to know a little insite seens you know a little.

Then you follow all the commands in the book (unless you're doing ALFS, then that's another matter).

Dark_Sniper* · 07-23-2005, 12:02 AM

no im only doing LFS well so i will need to use or do BLFS or what. So i will be programming with the book lol whatever it tells me to do i do. The reason i ask about what its needs is becasue i want to use this on a p1 labtop im getting next week. KNow doing this step by step is there a way to save waht im doing or will i have to keep that computer on.