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Requested and Answered by Johnny Hughes [hughesjr] on 24-Feb-2006 10:32 (47421 reads)
How do I download and burn the CentOS isos?
You can download the latest CentOS ISOs from here:
CentOS Downloads
After you download the ISOs, you should check the MD5 sums of the iso file(s) that you downloaded against the published md5sum list in the ISO directory. If the md5sum values match, the download is good ... if they do not match, the file was not downloaded correctly, and you need to get the file over again. Bittorrent downloads are best, because they do an MD5sum check as part of the download process. Here is a reference on how to do an md5sum check of an ISO file:
Using md5sum (or sha1sum) to verify the integrity of your ISO image
Once you have verified the md5sum of the ISO, you know you have a good download. Now you can burn the iso to a disk. If you have k3b (CentOS-4 users do, all other CentOS users do not by default) I recommend you use it. You want to use the Tools -> CD -> Burn CD Image or Tools -> DVD -> Burn DVD ISO Image option to write the ISO file to a CD/DVD.
If you need to burn the images with another program (cdrecord on linux, Nero on Windows, etc.) here is a good reference for burning ISO images:
How to burn your CD / DVD ISO
Once the CD is burned, you should be able to boot from it. The last check you need to do is to verify the media. This will verify that the writing of the ISO to your media happened correctly.
There will be a Check Media option after you select your keyboard and language.
If your media passes this check (make sure to check each disc for multiple media sets), you have a fully working installable media.
If it fails this check, but passed the md5 check above, then the problem is with the burned media. Try burning on new media at a slower speed, if possible.
All CentOS ISOs that we release have been checked, so if the MD5 sums that you have match, the ISOs should burn clean and pass the media checks. If they do not, the problem is almost always a bad media write to CD/DVD.
If you would rather buy your CentOS ISOs already burned, please see our official CentOS CD/DVD Vendors page. These official CentOS vendors donate a portion of each CD/DVD sale directly to the CentOS Project. You get a tested ISO ready to use ... we get money ... does it get any better than that
CentOS Downloads
After you download the ISOs, you should check the MD5 sums of the iso file(s) that you downloaded against the published md5sum list in the ISO directory. If the md5sum values match, the download is good ... if they do not match, the file was not downloaded correctly, and you need to get the file over again. Bittorrent downloads are best, because they do an MD5sum check as part of the download process. Here is a reference on how to do an md5sum check of an ISO file:
Using md5sum (or sha1sum) to verify the integrity of your ISO image
Once you have verified the md5sum of the ISO, you know you have a good download. Now you can burn the iso to a disk. If you have k3b (CentOS-4 users do, all other CentOS users do not by default) I recommend you use it. You want to use the Tools -> CD -> Burn CD Image or Tools -> DVD -> Burn DVD ISO Image option to write the ISO file to a CD/DVD.
If you need to burn the images with another program (cdrecord on linux, Nero on Windows, etc.) here is a good reference for burning ISO images:
How to burn your CD / DVD ISO
Once the CD is burned, you should be able to boot from it. The last check you need to do is to verify the media. This will verify that the writing of the ISO to your media happened correctly.
There will be a Check Media option after you select your keyboard and language.
If your media passes this check (make sure to check each disc for multiple media sets), you have a fully working installable media.
If it fails this check, but passed the md5 check above, then the problem is with the burned media. Try burning on new media at a slower speed, if possible.
All CentOS ISOs that we release have been checked, so if the MD5 sums that you have match, the ISOs should burn clean and pass the media checks. If they do not, the problem is almost always a bad media write to CD/DVD.
If you would rather buy your CentOS ISOs already burned, please see our official CentOS CD/DVD Vendors page. These official CentOS vendors donate a portion of each CD/DVD sale directly to the CentOS Project. You get a tested ISO ready to use ... we get money ... does it get any better than that
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