Instruction to disable THP on page https://developer.couchbase.com/documentation/server/current/install/thp-disable.html does not work on ubuntu 16.04

Create a ubuntu 16.04 64-bit on AWS.

Follow instruction in page https://developer.couchbase.com/documentation/server/current/install/thp-disable.html to disable THP on ubuntu instance but failed with error

root@ip-172-31-14-2:~# vi /etc/init.d/disable-thp
root@ip-172-31-14-2:~# chmod 755 /etc/init.d/disable-thp
root@ip-172-31-14-2:~# service disable-thp start
Failed to start disable-thp.service: Unit disable-thp.service not found.
root@ip-172-31-14-2:~# cat /sys/kernel/mm/transparent_hugepage/enabled
[always] madvise never
root@ip-172-31-14-2:~# /etc/init.d/disable-thp
root@ip-172-31-14-2:~# cat /sys/kernel/mm/transparent_hugepage/enabled
[always] madvise never
root@ip-172-31-14-2:~# cat /sys/kernel/mm/transparent_hugepage/defrag
[always] madvise never

I have to run manually

echo never > /sys/kernel/mm/transparent_hugepage/enabled

echo never > /sys/kernel/mm/transparent_hugepage/defrag{{}}