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We are working to upgrade our rhel servers ( rhel 7.1 ) to rhel 7.8 by rhel 7.8 ISO file

Since we have 296 rhel servers version rhel 7.1 we plan to do the upgrade as the following

We build Linux centralize server to keep on this server the ISO file - rhel-7.8.ISO

On the other servers - rhel 7.1 , we copy the ISO file by SCP or rsync the ISO file from the centralize server , and upgrade the rhel to 7.8 by yum install

Since the ISO file is huge file around 6 GIGA

We want to know what is the best approach to compress / shrink the ISO file

I will appreciate to get any good suggestion

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    You would not be able to compress the ISO file system very much if most of the files on the filesystem already are compressed. I'm assuming that the 6 GB are mostly package files. If I'm not mistaken, these are usually compressed already. – Kusalananda Oct 23 '20 at 10:49
  • may I ask with which approach better to transfer the ISO file for example - SCP or RSYNC or other ( we should to the copy in parallel on all machines ) – yael Oct 23 '20 at 10:50
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    rsync with otf-compression should be "good enough". Although i doubt it makes any larger difference. ubuntu server image is 914M as ISO and 890M as .gz – stoney Oct 23 '20 at 10:54
  • You have now asked three separate questions: 1) Is it safe to compress the ISO file? 2) How may the file be compressed? and 3) How may it be transferred? I suggest that you clarify which of these questions is the main one, or whether there is some other question regarding the approach that you are considering. – Kusalananda Oct 23 '20 at 11:00
  • based on your first note , I think the 3 question is now more important to me – yael Oct 23 '20 at 11:07

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