rhel7small.iso -b isolinux/isolinux.bin -J -R -l -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -e images/efiboot.img -no-emul-boot -graft-points -V "RHEL-7.8 Server.x86_64" -jcharset utf-8. # chmod -R u+w /mnt/rhel7.8-small/isolinux
#Red hat linux iso requirements install
Install the following ISO tooling: # yum install genisoimage isomd5sum syslinux Copy the RPM list from the RPM list text file generated from Step 1 to /mnt/rhel7.8-small/Packages/: # for i in `cat rpmlist.txt` do cp /mnt/rhel7.8-master/Packages/$i* /mnt/rhel7.8-small/Packages/ done Remove all add-ons (optional): # chmod -R u+w /mnt/rhel7.8-small/addonsĦ.
Remove all existing packages: # chmod u+w /mnt/rhel7.8-small/Packagesĥ. Create a working directory structure and copy the master ISO contents: # mkdir /mnt/rhel7.8-small Loop mount it so we can copy its contents to a location to manipulate: # mkdir /mnt/rhel7.8-master The following instructions build the small ISO directory structure, copy contents from the RPM list provided in Step 1, and then generate a small ISO file to be used for installation.Ģ. The build RPM list is used as the source of the package list in Step 2: # rpm -qa > rpmlist.txtĬopy rpmlist.txt to your ISO build system directory in Step 2. This source list of RPMs ensures our new smaller ISO has only the packages needed to install, thus reducing the overall size of the ISO required for installation. After rebooting, create a list of all installed RPM packages so you can use that list as the source to build a customized smaller ISO. I built one with the “minimum” package option using the graphical installer. Use any installation method to install/configure RHEL 7.8 to the desired state. Step 1: Build a RHEL 7.8 system with the desired package set
#Red hat linux iso requirements how to
The default RHEL 7.8 ISO is over 4GB in size these steps show you how to create a RHEL 7.8 ISO that is 1GB in size and supports a smaller RHEL installation. I walk you through the steps to build a custom, small RHEL installation ISO. Customers often ask how they can reduce the installation media to make delivery over slower networks faster. Not everyone has high-speed network connections to locations where they need to install Red Hat Enterprise Linux (RHEL). Please see this solution on the Red Hat Customer Portal for more information and other options that you may wish to consider for your environment.
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