[root@ipxx-xx-xx-xx ec2-user]# service ip6tables stop
Redirecting to /bin/systemctl stop  ip6tables.service
Failed to stop ip6tables.service: Unit ip6tables.service not loaded.
[root@ipxx-xx-xx-xx ec2-user]# chkconfig iptables status
chkconfig version 1.3.61 - Copyright (C) 1997-2000 Red Hat, Inc.
This may be freely redistributed under the terms of the GNU Public License.

usage:   chkconfig [--list] [--type <type>] [name]
         chkconfig --add <name>
         chkconfig --del <name>
         chkconfig --override <name>
         chkconfig [--level <levels>] [--type <type>] <name> <on|off|reset|reset                                         priorities>
[root@ipxx-xx-xx-xx ec2-user]# chkconfig --list

Note: This output shows SysV services only and does not include native
      systemd services. SysV configuration data might be overridden by native
      systemd configuration.

      If you want to list systemd services use 'systemctl list-unit-files'.
      To see services enabled on particular target use
      'systemctl list-dependencies [target]'.

ambari-agent    0:off   1:off   2:off   3:on    4:on    5:on    6:off
ambari-server   0:off   1:off   2:off   3:on    4:on    5:on    6:off
choose_repo     0:off   1:off   2:on    3:on    4:on    5:on    6:off
netconsole      0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off
rh-cloud-firstboot      0:off   1:off   2:off   3:off   4:off   5:off   6:off
rhnsd           0:off   1:off   2:on    3:on    4:on    5:on    6:off
[root@ipxx-xx-xx-xx ec2-user]# chkconfig ip6tables off
error reading information on service ip6tables: No such file or directory
[root@ipxx-xx-xx-xx ec2-user]#  service iptables status
Redirecting to /bin/systemctl status  iptables.service
? iptables.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
[root@ipxx-xx-xx-xx ec2-user]#

error reading information on service ip6tables: No such file or directory
[root@ipxx-xx-xx-xx ec2-user]#  service iptables status
Redirecting to /bin/systemctl status  iptables.service
? iptables.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
[root@ipxx-xx-xx-xx ec2-user]#  service iptables save
The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.
[root@ipxx-xx-xx-xx ec2-user]#  service iptables stop
Redirecting to /bin/systemctl stop  iptables.service
Failed to stop iptables.service: Unit iptables.service not loaded.
[root@ipxx-xx-xx-xx ec2-user]# chkconfig iptables off
error reading information on service iptables: No such file or directory
[root@ipxx-xx-xx-xx ec2-user]#  chkconfig --level 345 sshd on
Note: Forwarding request to 'systemctl enable sshd.service'.
[root@ipxx-xx-xx-xx ec2-user]#  service sshd restart
Redirecting to /bin/systemctl restart  sshd.service
[root@ipxx-xx-xx-xx ec2-user]# setenforce 0
[root@ipxx-xx-xx-xx ec2-user]#  /sys/kernel/mm/redhat_transparent_hugepage/enabled
bash: /sys/kernel/mm/redhat_transparent_hugepage/enabled: No such file or directory
[root@ipxx-xx-xx-xx ec2-user]#  echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled
bash: /sys/kernel/mm/redhat_transparent_hugepage/enabled: No such file or directory
[root@ipxx-xx-xx-xx ec2-user]#  echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag
bash: /sys/kernel/mm/redhat_transparent_hugepage/defrag: No such file or directory