lucabelluccini

Raspberry 4B - Boot from SD and rootfs on USB

Update

RPi4 now supports booting directly from USB. First update to get an eeprom which supports USB Boot, then configure the bootloader to boot from USB.

Original guide

1. Download Raspbian from the official site

uzl

Install Latest Nvidia Driver in Ubuntu 18.04 LTS

Step: 1

Remove previous installation

sudo apt-get purge nvidia*
sudo apt-get autoremove 

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bgulla

Jetson Nano Cheatsheet

Below are my personal notes related to the Nvidia Jetson Nano Dev-board.

Performance Management

Nvidia allows your to fine tune the performance of your Jetson nano. More on this here.

Show the current settings

sudo /usr/bin/jetson_clocks.sh --show

hikiko4ern

# /------------------------------------------\
# | don't forget to download the .tp file    |
# | and place it in the user's directory :›  |
# |                                          |
# | also install lolcat:                     |
# |  https://github.com/busyloop/lolcat      |
# \------------------------------------------/

alias test-passed='if [ "$?" -eq "0" ]; then lolcat ~/.tp -a -s 40 -d 2; fi;'

gr2m

stevejenkins

# Instructions for installing Pi-hole 4.2 on UniFi CloudKey Gen 1 (UC-CK) running firmware 0.13.6
# Pi-hole will need to be completely re-installed after every FW update or if CloudKey is reset to defaults.

# Verify UC-CK is running firmware v0.13.6 (or later) before installing Pi-hole. If not, do:
ubnt-systool fwupdate https://dl.ubnt.com/unifi/stage/cloudkey/firmware/UCK/UCK.mtk7623.v0.13.6.7ad551e.190225.0939.bin

# UC-CK firmware v0.13.6 downgrades UniFi Controller to 5.10.17. Upgrade to 5.10.19 with:
cd /tmp
wget https://dl.ubnt.com/unifi/5.10.19/unifi_sysvinit_all.deb
dpkg -i unifi_sysvinit_all.deb

mak3r

air-gap Rancher install

This is an unofficial documentation of what I did to setup the Rancher v2 air-gap HA install

Official docs are here https://rancher.com/docs/rancher/v2.x/en/installation/air-gap-high-availability/

Oats87

#!/bin/bash
echo "This will generate a new kube config for accessing your RKE-created kubernetes cluster. This script MUST be run on a Kubernetes node."
echo "Please enter the IP of one of your control plane hosts, followed by [ENTER]:"

read cphost

openssl genrsa -out kube-admin.key 2048
openssl req -new -sha256 -key kube-admin.key -subj "/O=system:masters/CN=kube-admin" -out kube-admin.csr
sudo openssl x509 -req -in kube-admin.csr -CA /etc/kubernetes/ssl/kube-ca.pem -CAcreateserial -CAkey /etc/kubernetes/ssl/kube-ca-key.pem -out kube-admin.crt -days 365 -sha256
sudo rm -f /etc/kubernetes/ssl/kube-ca.srl

superseb

#!/bin/sh
# Backup your data
# Use at your own risk
# Usage ./extended-cleanup-rancher2.sh
# Include clearing all iptables: ./extended-cleanup-rancher2.sh flush
docker rm -f $(docker ps -qa)
docker rmi -f $(docker images -q)
docker volume rm $(docker volume ls -q)
for mount in $(mount | grep tmpfs | grep '/var/lib/kubelet' | awk '{ print $3 }') /var/lib/kubelet /var/lib/rancher; do umount $mount; done
cleanupdirs="/etc/ceph /etc/cni /etc/kubernetes /opt/cni /opt/rke /run/secrets/kubernetes.io /run/calico /run/flannel /var/lib/calico /var/lib/etcd /var/lib/cni /var/lib/kubelet /var/lib/rancher/rke/log /var/log/containers /var/log/pods /var/run/calico"

debsahu

shell_command:
  rtlamr_start: 'python3.6 /home/pi/work/rtlamrmqtt.py'
  kill_rtlamr: 'pkill -f rtlamr'

automation:
  - action:
    - data: {}
      service: shell_command.rtlamr_start
    alias: Start RTLAMR Script
    condition: []