Mustafa Turan mustafaturan

Collection of sysctl networking notes

List & reloading changes
Summary details of each connection status
Settings tweaking in /etc/sysctl.conf
- Detailed setting notes
- Control TIME_WAIT and connection tracking timeouts
Miscellaneous
- Nginx Plus additions
Further reading

Monitoring Libp2p

Libp2p is one of most commonly used libraries across web3 infrasture. It exposes several metrics compatible with Prometheus.

The official github repo has Grafana dashboard json for a quick start.

Set screen blanking: sudo raspi-config nonint do_blanking 0
Set lingering: sudo loginctl enable-linger $(whoami)
If above two does not work sudo setterm -powerdown 0 and sudo setterm -powersave off

Untar remote file to local directory

Downloading a tar.gz file and extracting it after the download completes might consume a lot of disk space and time. It is possible to write tar.gz file directly as input to tar command and untar it to directory directly from remote url.

wget -qO- your_link_here | tar -xvz -C /target/directory

# Create the folder to mount drive 
sudo mkdir /mnt/storage

# Set user/group perms to write
chown -R pi:pi /mnt/storage

# find the driver properties
sudo blkid

	# Using this composer in the machines that a specific app runs which opens the port for prometheus
	# Using promtail collect logs and publish to external loki
	version: '3.8'

	networks:
	monitoring:
	driver: bridge

	services:
	cadvisor:

	sudo sysctl -w kern.maxfiles=75000
	sudo sysctl -w kern.maxfilesperproc=75000
	ulimit -S -n 75000

	APP_ENV=production
	MONOFLAKE_NODE=0

	#!/bin/bash
	ip neigh show dev wlan0