Lisenet,
Red Hat doesn't support custom compiled RHEL kernels. However, it looks like RJ is either the author or maintainer of the script as on the linked discussion he asks for feedback. However, instead of that logic trying to RH's policies around custom kernel support, the logic is more to identify a RHEL7 system vs RHEL6 vs RHEL5 et al.
I would suggest that the author of the script move from 'uname -a | grep el7' and instead something more like:
head -n1 /etc/redhat-release | grep [0-9] | cut -d'.' -f1| rev | cut -c 1
I'm sure someone could also come up wiht a like a 1 line awk+sed script to do this as well, but I'm a shell guy. The grep from the middle could be cut out if one knows that the 1st line of the /etc/redhat-release file was not modified. Maybe a bit better would be to check the file for modification before horking with it for getting decision data. Like:
if [ $(rpm -Vf /etc/redhat-release | grep redhat-release | grep 5 &>/dev/null) ]
then
echo "ERROR: /etc/redhat-release has been modified, NOT DEFAULT"
exit
else
$rhel_maj_vers = $(head -n1 /etc/redhat-release | cut -d'.' -f1| rev | cut -c 1)
fi
That would account for a kernel version without el{num} and would also check to see if someone had modified /etc/redhat-release before making important decisions based on the data.
-STM
