First, check the Amazon Linux version you have running on using the command cat /etc/os-release
If the Amazon Linux Version 2, then it does support the system and comes installed by default.
If your Amazon Linux version is 1, then it will not support cause Amazon Linux is ultimately based on an old version of CentOS/RHEL.
if your version is 1 (amazon Linux), you need to switch to another Linux distribution that will support the systemd. You can't yum install systemd like a package
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