EBS 12.2 cloning adcfgclone.pl appsTier fails on Linux 8 when the precloned tar backup is sourced from a Linux 7 environment.

ISSUE: EBS 12.2 adcfgclone.pl appsTier fails on Linux 8 when the precloned tar backup is sourced from a Linux 7 environment.

CAUSE: The Fusion Middleware (FMW) prerequisite check fails because the OS version (oracle-8.10) is not listed as certified. The log at /u01/8045_Iteration/ebiz/fs1/EBSapps/comn/clone/FMW/logs/prereqcheck.log shows that /etc/inittab is missing and the expected OS list includes only older versions like oracle-7, redhat-7, etc.

WORKAROUND (at the target clone server):
1) Navigate to /u01/8045_Iteration/ebiz/fs1/EBSapps/comn/clone/prereq/webtier/Scripts/prereq/linux64.
2) Unzip the patch p33471111_111190_Generic.zip in the PatchTop directory (/u01/8045_Iteration) using unzip p33471111_111190_Generic.zip.
3) Replace the prereq folder under FMW inventory:
cd /u01/8045_Iteration/ebiz/fs1/FMW_Home/webtier/inventory/Scripts
mv prereq OFF_TILL_LINUX_7_prereq
cp -r /u01/8045_Iteration/prereq .
This updated prereq includes Linux 8 compatibility by adding <OPERATING_SYSTEM> blocks for Oracle and Red Hat Linux 8 with required packages, glibc (≥ 2.17), and kernel parameters.

PERMANENT SOLUTION: Apply the same patch to the Source / Production EBS App Tier. Steps:

1. Unzip the patch zip file into the PATCH_TOP. unzip -d PATCH_TOP p33471111_111190_Generic.zip
2. Copy the “prereq” directory from the patch and replace /webtier/inventory/Scripts on both the Run and Patch filesystems of the 12.2 environment.
3. Unzip the patch zip file into the PATCH_TOP
cd /u01/8045_Iteration
unzip p33471111_111190_Generic.zip
This will deliver prereq folder with updated linux 8 supported piece of code
4. cd /u01/8045_Iteration/ebiz/FMW_Home/webtier/inventory/Scripts
mv prereq OFF_TILL_LINUX_7_prereq
cp -r /u01/8045_Iteration/prereq .
5. cd $ADMIN_SCRIPTS_HOME
perl adpreclone.pl appsTier
6. Create new Precloned Tar Backup of /u01/Prod/ebiz/fs1/EBSapps ( From Linux 7 Production ). transfer and extract to your target linux 8 Server.