From 8d7711709d452c7f9dc2cc4bca6f05fec834d6e7 Mon Sep 17 00:00:00 2001
From: ceetav <ceetav@gmail.com>
Date: Thu, 24 May 2018 00:13:49 +0300
Subject: [PATCH] centos, rhel, oracle: remove previous kernels to minimize
 image size

`yum update` keeps several kernel versions installed at the same time (installonly_limit).
Removing previous kernels drops the image size by about 50 megs.
---
 centos/scripts/cleanup.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/centos/scripts/cleanup.sh b/centos/scripts/cleanup.sh
index f4db8a1c4..d1f960de1 100644
--- a/centos/scripts/cleanup.sh
+++ b/centos/scripts/cleanup.sh
@@ -57,3 +57,7 @@ fi
 
 # delete any logs that have built up during the install
 find /var/log/ -name *.log -exec rm -f {} \;
+
+# remove previous kernels that yum preserved for rollback
+yum install -y yum-utils
+package-cleanup --oldkernels --count=1 -y