ntfy/docs/examples.md

Examples

There are a million ways to use ntfy, but here are some inspirations. I try to collect examples on GitHub, so be sure to check those out, too.

A long process is done: backups, copying data, pipelines, ...

I started adding notifications pretty much all of my scripts. Typically, I just chain the curl call directly to the command I'm running. The following example will either send Laptop backup succeeded or ⚠️ Laptop backup failed directly to my phone:

rsync -a root@laptop /backups/laptop \
  && zfs snapshot ... \
  && curl -H prio:low -d "Laptop backup succeeded" ntfy.sh/backups \
  || curl -H tags:warning -H prio:high -d "Laptop backup failed" ntfy.sh/backups

Server-sent messages in your web app

Just as you can subscribe to topics in the Web UI, you can use ntfy in your own web application. Check out the live example or just look the source of this page.

Notify on SSH login

Years ago my home server was broken into. That shook me hard, so every time someone logs into any machine that I own, I now message myself. Here's an example of how to use PAM to notify yourself on SSH login.

=== "/etc/pam.d/sshd" # at the end of the file session optional pam_exec.so /usr/bin/ntfy-ssh-login.sh

=== "/usr/bin/ntfy-ssh-login.sh" bash #!/bin/bash if [ "${PAM_TYPE}" = "open_session" ]; then curl \ -H prio:high \ -H tags:warning \ -d "SSH login: ${PAM_USER} from ${PAM_RHOST}" \ ntfy.sh/alerts fi

Collect data from multiple machines

The other day I was running tasks on 20 servers, and I wanted to collect the interim results as a CSV in one place. Each of the servers was publishing to a topic as the results completed (publish-result.sh), and I had one central collector to grab the results as they came in (collect-results.sh).

It looked something like this:

=== "collect-results.sh" bash while read result; do [ -n "$result" ] && echo "$result" >> results.csv done < <(stdbuf -i0 -o0 curl -s ntfy.sh/results/raw) === "publish-result.sh" ```bash // This script was run on each of the 20 servers. It was doing heavy processing ...

// Publish script results
curl -d "$(hostname),$count,$time" ntfy.sh/results
```