Created Using systemd units instead of cron (markdown)

Using-systemd-units-instead-of-cron.md

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+**1. Create a systemd unit for acme.sh:**
+
+`/etc/systemd/system/acme_letsencrypt.service`
+```
+[Unit]
+Description=Renew Let's Encrypt certificates using acme.sh
+After=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/path/to/acme.sh <your acme.sh arguments here>
+```
+
+**2. Test that it works before creating the timer:**
+```
+sudo systemctl daemon-reload
+sudo systemctl start acme_letsencrypt --now
+```
+
+**3. Create systemd timer unit for the service above:**
+
+`/etc/systemd/system/acme_letsencrypt.timer`
+```
+[Unit]
+Description=Daily renewal of Let's Encrypt's certificates
+
+[Timer]
+OnCalendar=daily
+RandomizedDelaySec=1h
+Persistent=true
+
+[Install]
+WantedBy=timers.target
+```
+
+**4. Enable timer:**
+`sudo systemctl enable acme_letsencrypt.timer`