rhel description update

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
rhel page keywords update

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
some typo corrections

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
more typo corrections

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>