Before a disk fills up.
Run a small threshold check with df, free, or top, or forward an alert from Grafana or Netdata. When CPU, memory, or disk passes your limit, a push notification arrives on your phone carrying the current value.
Warned before the box runs dry
A disk that fills at 3am drags everything down with it. Warn yourself at 85 percent and you still have time to act.
One shell check
A two-line check with df, free, or top pushes when usage passes your limit. Nothing to install.
Or your existing tools
Or forward threshold alerts from Grafana, Netdata, Zabbix, and Prometheus.
Usage in the alert
The message carries the current value and threshold, so you know the urgency and the location.
Early thresholds
Warn at 85% disk or 90% memory and the alert reaches you with time to act.
Catch it early
A full disk or pegged CPU can drop services with no warning. This catches it while time remains.
Instant warning
When a threshold trips, the push arrives. No dashboard to keep open.
Three steps to resource alerts
Get the CLI or URL
Install the PocketAlert CLI, or grab your webhook URL for a curl-based check.
Set a threshold
Add a threshold check to cron, or forward an alert from your monitoring tool.
Act with runway
Usage passes the line and your phone buzzes with the value, while you still have runway.
Alert on resource usage
1. Install the CLI and authenticate
Download the pocketalert binary, drop it on your PATH, and authenticate once with your API key from the dashboard.
sudo mv pocketalert /usr/local/bin/ && chmod +x /usr/local/bin/pocketalert
pocketalert auth YOUR_API_KEY2. Disk threshold (cron)
Read disk usage with df and push only when it crosses 85%.
USAGE=$(df / | awk 'NR==2{print $5}' | tr -d %)
[ "$USAGE" -gt 85 ] && pocketalert send \
-t "Disk ${USAGE}% on /" -m "Free space running low on $(hostname)"3. Memory and CPU thresholds
The same pattern works for RAM with free and CPU load with top.
MEM=$(free | awk '/Mem/{printf "%d", $3/$2*100}')
[ "$MEM" -gt 90 ] && pocketalert send -t "Memory ${MEM}% on $(hostname)" -m "High memory pressure"
CPU=$(top -bn1 | awk '/Cpu\(s\)/{printf "%d", 100 - $8}')
[ "$CPU" -gt 90 ] && pocketalert send -t "CPU ${CPU}% on $(hostname)" -m "Sustained high CPU"4. Schedule it
Add the script to cron so it runs every five minutes.
*/5 * * * * /usr/local/bin/check-resources.shNo CLI? Swap pocketalert send for a curl POST to the messages API.
curl -X POST 'https://api.pocketalert.app/v1/messages' \
-H 'Token: YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{"title":"Disk full","message":"Disk over 85% on db-1","level":"critical"}'Already run a monitoring tool? Point a Grafana or Netdata threshold alert at a PocketAlert webhook instead. The docs cover the rest.
Questions, answered
Schedule a small check, or forward a threshold alert from Grafana, Netdata, or Zabbix that POSTs to PocketAlert when CPU, memory, or disk passes a limit. The warning reaches your phone with time to react.
Yes. A two-line shell check with df, free, or top compares usage against a threshold and pushes only when it trips. No monitoring platform needed.
Put the current value and the threshold in the message, like "Disk 92% on /var". You learn how urgent it is and which mount or process caused it.
Both work. Forward threshold alerts from Grafana, Netdata, Zabbix, or Prometheus, or run a tiny cron check on the box. PocketAlert takes the push either way.
Set the threshold below the danger zone, around 85% disk and 90% memory. That leaves enough time to clear space or scale up.
Yes. Add level=critical to the check that must wake you, say a 95% disk threshold, and Android posts it on a channel that bypasses Do Not Disturb while iPhone shows it as a time-sensitive notification that breaks through Focus. Keep the early 85% warning at the default level so it stays polite.
Catch a full disk at 85 percent.
Set a threshold, hang a curl off the check, and you hear about trouble with time to spare.