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https://github.com/lukaszlapaj/raspberry-pi-cheat-sheet

List of commands, configurations and tips for Raspberry Pi and Linux beginners.
https://github.com/lukaszlapaj/raspberry-pi-cheat-sheet

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List of commands, configurations and tips for Raspberry Pi and Linux beginners.

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# Raspberry Pi 4 Cheat Sheet

List of commands, configurations and tips for Raspberry Pi and Linux beginners. Also known as a quick start guide.



# Table of contents



* [Raspberry Pi OS / Linux](#raspberry-pi-os--linux)

* [Pi-hole](#pi-hole)

* [Git](#git)

* [Node.js](#nodejs)

* [Docker](#docker)

* [Speedtest.net](#speedtestnet)



# Raspberry Pi OS / Linux

## Pi user default password

Default password for pi user is "raspberry"



## Enable SSH

To enable SSH, which is disabled by default in Raspbian, just put an empty `ssh` file with no extension on `/boot` partition.



## Useful configs

Go to `/boot/config.txt` and add these entries in the end of the file.

##### Or directly from terminal

```

sudo nano /boot/config.txt

```

### Overclocking

##### CPU

```

over_voltage=6

arm_freq=2000

core_freq=600

```



##### GPU

```

gpu_freq=750

gpu_mem=128

```



##### Override temperature limit

```

temp_limit=75

```



### Enable 64-bit kernel

```

arm_64bit=1

```



### Miscellaneous

#### Prevent HDMI TV from turning on when Raspberry Pi is booting

```

hdmi_ignore_cec_init=1

```



##### Disable splash screen

```

disable_splash=1

```



##### Disable Wi-Fi

```

dtoverlay=disable-wifi

```



##### Disable Bluetooth

```

dtoverlay=disable-bt

```



##### Disable camera

```

start_x=0

```



## Beta / stable releases

##### Edit `rpi-eeprom-update` file

```

sudo nano /etc/default/rpi-eeprom-update

```

##### and change content to

```

FIRMWARE_RELEASE_STATUS="beta"

```

##### or

```

FIRMWARE_RELEASE_STATUS="stable"

```



## Shutdown / Reboot

##### Shutdown

```

sudo shutdown -h now

```

##### Reboot

```

sudo shutdown -r now

```

##### Uptime

```

uptime -p

```

##### Last boot time

```

uptime -s

```



## Kernel version

##### Check kernel version and info

```

uname -a

```



## Working with PATH variable

##### Print PATH variable line by line

```

echo $PATH | tr : '\n'.

```



##### Add to PATH

```

export PATH=:$PATH

```



## Update / Upgrade everything

##### One-liner

```

sudo apt-get update -y && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y && sudo apt-get autoremove -y && sudo rpi-eeprom-update -a

```

## Read system logs in real-time

##### List last 30 lines from system logs and updates in real-time

```

tail -f -n 30 /var/log/syslog

```



## Audio

##### Testing audio on default output

```

speaker-test -c2 -twav -l7

```



## MicroSD

##### Benchmark

```

sudo apt install agnostics

```

```

sh /usr/share/agnostics/sdtest.sh

```



## Chromium / Chrome

##### Chromium screen tearing fix

```

sudo rm /etc/xdg/autostart/xcompmgr.desktop

```



## Read temperature

##### One time read CPU temp

```

echo "$(($(/var/log/pihole_updateGravity.log || cat /var/log/pihole_updateGravity.log

```

##### Which means every day at 2AM



## Update Gravity

##### Download latest blocklists

```

pihole updateGravity

```



## Gravity update logs

##### Read last gravity update logs or watch it in real-time.

```

tail -f -n 30 /var/log/pihole_updateGravity.log

```



## Set additional DNS servers

##### Pi-hole dashboard allows to set only 1 custom DNS server

```

sudo nano /etc/pihole/setupVars.conf

```

##### Then add new servers like this

```

PIHOLE_DNS_1=8.8.8.8

PIHOLE_DNS_2=2001:4860:4860:0:0:0:0:8888

PIHOLE_DNS_3=1.1.1.1

PIHOLE_DNS_4=2606:4700:4700::1111

PIHOLE_DNS_5=62.179.1.60

PIHOLE_DNS_6=62.179.1.61

PIHOLE_DNS_7=62.179.1.62

PIHOLE_DNS_8=62.179.1.63

```

##### Restart service

```

sudo service pihole-FTL restart

```



# Git

## Configuration

##### Create store for user credentials

```

git config --global credential.helper store

```



##### Set account's default identity

```

git config --global user.email "[email protected]"

git config --global user.name "Lukasz Lapaj"

```



# Node.js

## Installation

##### Preinstalled Raspberry Pi OS repository version is outdated, use version below:

```

curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -

sudo apt-get install -y nodejs

```



# Docker

## Installation

##### Remove old versions

```

sudo apt-get remove docker docker-engine docker.io containerd runc

```

##### Install pre-requirements

```

sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

```

##### Add Docker’s official GPG key

```

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

```

##### Install docker

```

sudo apt-get install docker-ce docker-ce-cli containerd.io

```



# Speedtest.net

## Installation

##### Pre-requirements

```

sudo apt-get install gnupg1 apt-transport-https dirmngr

export INSTALL_KEY=379CE192D401AB61

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys $INSTALL_KEY

echo "deb https://ookla.bintray.com/debian generic main" | sudo tee  /etc/apt/sources.list.d/speedtest.list

```

##### Install

```

sudo apt-get install speedtest

```