After installing the Linux OS, install these packages:

  • NTP - used to synchronize system clocks:

    sudo yum install -y ntp
    sudo systemctl start ntpd
    sudo systemctl enable ntpd
  • Postfix - used for sending out emails from the SHRINE system (SHRINE can be configured to use alternatives for sending email)

    sudo yum remove sendmail //if installed
    sudo yum install -y postfix
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