Linux - banalize a system

test $EUID -eq 0 || { echo "Run this script as root"; exit 1; }

package-cleanup --oldkernels --count=1

logrotate -f /etc/logrotate.conf
rm -f /var/log/*-???????? /var/log/*.gz
rm -f /var/log/dmesg.old
rm -rf /var/log/anaconda

cat /dev/null > /var/log/audit/audit.log
cat /dev/null > /var/log/wtmp
cat /dev/null > /var/log/lastlog
cat /dev/null > /var/log/grubby

rm -rf /etc/ssh/*key*

sed -i 's/HOSTNAME=.*$/HOSTNAME=localhost/g' /etc/sysconfig/network
echo 'localhost' > /etc/hostname

find /etc/sysconfig/network-scripts -name ifcfg-* | while read cfg;do
  sed -i -e '/^HWADDR=/d' -e '/^UUID=/d' -e 's/^IPADDR=/#IPADDR=/g' $cfg
done

rm -f /etc/udev/rules.d/*-persistent-*.rules

yum clean all

rm -f /root/.bash_history

touch /.unconfigured

history -c

subscription-manager remove --all
subscription-manager unregister
subscription-manager clean