Linux commands....have I done it correctly?

Hi guys,

I've been following the commands below on the command line:

https://kb.swivelsecure.com/wiki/index.php/NTP_servers

I'd like to know when it gets to the section where it says :

'add the following line to the file timesync.sh

ntpdate -t 2 -s NTP_SERVER_IP > /dev/null 2>& 1'

Whehter it means I must type 'ntpdate -t 2 -s NTP_SERVER_IP > /dev/null 2>& 1' in the CLI? Or does it mean I must open the file timesync.sh and add 'ntpdate -t 2 -s NTP_SERVER_IP > /dev/null 2>& 1' into that file, save it, close it and resume with the rest of the commands on the CLI?

Thanks for your help
Yash