This script appears to be a cron job that runs in a specific context, likely in the context of setting up or managing the DynDNS (Dynamic DNS) service. Here's a breakdown of what the script does:
**Script content**
The script sends three types of messages to different channels: Telegram, Discord, and an internal DM.
* For successful updates (
-> or
OK:), it sends an update message with relevant output lines to all recipients.
* If there are errors (
ERROR or non-zero exits), it sends a warning message to the specified channels:
+ "telegram"-based messages include the recipient's username.
+ The first target (Telegram private channel) has a specific ID
1511697499654459422.
+ The third recipient is just the internal DM reference
1812605657.
**Conditional checks**
The script assumes a user is running it from a schedule, and as such, it:
* Ignores routine "no change" notices.
* Uses environment variables for Telegram channel IDs (
telegram:...).
* Handles errors and warnings specifically; if no error occurs, there's nothing to send (but in practice, that happens according to this script).
To run this script as a scheduled cron job:
1. Create a new file using your preferred text editor or IDE (e.g.,
cf-dyndns.sh).
2. Copy and paste the provided script into the file.
3. Log in to your DynDNS hosting server at
https://yourhost.dyndns.com/.
4. Navigate to the .hermes/scripts
directory (this script belongs there). You'll likely find it under a subdirectory like /cron/dynndscripts/
.
5. Save the changes and close your session.
You can now schedule this cron job in your hosting server's crontab editor:
`
bash
crontab -e << EOF
@weekly /path/to/.hermes/scripts/cf-dyndns.sh 2>&1
EOF
`
Replace /path/to/.hermes/scripts` with the actual path to the script directory on your hosting server. Save and close the file.
That's it! If everything goes according to plan, you'll see logs for each type of message sent to different channels.