ntp

The purpose of this document is to explain how to setup ntp (Network Time Protocol sync on Linux).

• which ntpdate # Check if you need to install it

  • daily_hourly="daily"

    • daily_hourly="hourly"

• grep -R ntpdate /etc/cron* # Check if it is already setup, if not, continue.

• yum -y install ntp # Also installs ntpdate. Use apt-get on Ubuntu.

• echo "ntpdate pool.ntp.org" > /etc/cron.${daily_hourly}/ntpdate

• chmod u+x /etc/cron.${daily_hourly}/ntpdate

• /etc/cron.${daily_hourly}/ntpdate

• date # Check for the right result here against your atomic clock

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