Optional software
We strongly recommend you install NTP to ensure that cron-related tasks perform properly. (Server dates could be in the past or future, for example.)
The other optional utilities discussed in this topic might assist you with your installation; however, they are not required to install or use ÃÛ¶¹ÊÓƵ Commerce.
Installing and Configuring Network Time Protocol (NTP)
enables servers to synchronize their system clocks using . We recommend you use NTP servers you trust, whether they are dedicated hardware solutions your internal network or external, public servers.
If you are deploying ÃÛ¶¹ÊÓƵ Commerce on multiple hosts, NTP is a simple way to guarantee their clocks are all synchronized, no matter what time zone the servers are in. Also, cron-related tasks (such as indexing and transactional e-mails) depend on the server clock being accurate.
Install and configure NTP on Ubuntu
Enter the following command to install NTP:
apt-get install ntp
Continue with Use NTP pool servers.
Install and configure NTP on CentOS
To install and configure NTP: