---
title: "Monitoring Tricks"
slug: "fmadio-os-monitoring-tricks"
updated: 2026-05-03T06:46:56Z
published: 2026-05-03T06:46:56Z
canonical: "docs.fmad.io/fmadio-os-monitoring-tricks"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fmad.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Monitoring Tricks

Various one lines or small tricks to extract information from the logs

## jq Log extraction

FMADIO relies heavily on JSON style logging, as such having an easy way to selectively extract data from the logs is useful.

Below extract 2 fields from the syslog, specifically the link status

```plaintext
cat messages | grep link | stripJSON | jq -c "{timestamp:(.timestamp|todate),cap0_link,cap1_link}"
```

Example output

```plaintext
fmadio@ny2-fmadio200v4-670:/mnt/store0/log$ cat messages | grep link | stripJSON | jq -c "{timestamp:(.timestamp|todate),cap0_link,cap1_link}" | head
{"timestamp":"2026-05-03T03:55:35Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:55:53Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:56:04Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:56:07Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:56:24Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:56:35Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:56:53Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:57:03Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:57:06Z","cap0_link":true,"cap1_link":true}
{"timestamp":"2026-05-03T03:57:24Z","cap0_link":true,"cap1_link":true}
```

## Extract Push PCAP Copy status

To list all fields on the push_pcap copy status

```plaintext
 cat messages | grep push_pcap | grep copy | stripJSON  | jq
```

Extract the Retry and Filename

```plaintext
 cat messages | grep push_pcap | grep copy | stripJSON  | jq -c "{timestamp:.timestamp|todate,Remote_Retry,RemoteFileName}"  
```

Example output

```plaintext
fmadio@ny2-fmadio200v4-670:/mnt/store0/log$  cat messages | grep push_pcap | grep copy | stripJSON  | jq -c "{timestamp:.timestamp|todate,Remote_Retry,RemoteFileName}"  | head
{"timestamp":"2026-05-03T03:56:07Z","Remote_Retry":0,"RemoteFileName":"/mnt/store1/s3_pcap/.../opra-05-1777778940.pcap.zst"}
{"timestamp":"2026-05-03T03:56:07Z","Remote_Retry":0,"RemoteFileName":"/mnt/store1/s3_pcap/../opra-03a-1777778940.pcap.zst"}
{"timestamp":"2026-05-03T03:56:07Z","Remote_Retry":0,"RemoteFileName":"/mnt/store1/s3_pcap/../opra-08b-1777778940.pcap.zst"}
.
.
```

## Extract Failed Copys

To extract a list of failed remote copys. Using the NOT OK grep at the end selects any copy that did not pass

```plaintext
cat messages | grep push_pcap | grep copy | stripJSON  | jq -c "{timestamp:.timestamp|todate,Status,RemoteFileName}" | grep -v OK
```