> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/b3-sms-device-installation-manual/troubleshooting/system-log.md).
# System Log
The router provides a system log which shows different system events including the messages from the script. If there are no messages from the script in the log, then probably it does not work.
1. In router web UI go to System - Administration and select Troubleshoot tab.
2. Click "Show" button right from "System log" to show it.
3. Alternatively you can also look at the log from Putty.
To read the log, use:
```sh
logread | grep poll_api
```
To print log in realtime, use:
```sh
logread -f | grep poll_api
```
To clear the log, use:
```sh
logread -c
```
---
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