1. - Software recommendations

Program	Application	Link
SD Card Formatter	Format SD Cards	https://www.sdcard.org/downloads/formatter/
Balena Etcher	Flash OS images to SD cards	https://www.balena.io/etcher/
Win32DiskImager	write a raw disk image to a removable device or backup a removable device	https://sourceforge.net/projects/win32diskimager/
Putty	PuTTY is an SSH and telnet client	https://www.putty.org/
WinSCP	WinSCP is a SFTP client and FTP client	https://winscp.net/eng/download.php

2. - Standard Setup

2.1 - Use RPi-Imager

Raspberry Pi OS

Select Menu and set user, password, ssh and WiFi (optional)
pi//raspberry user//password does not work anymore!

create pi as a standard user! see pihole

2.2 - Manual setup

2.2.1 - Wifi connection

• create wpa_supplicant.conf in /boot
• use any text editor and edit the wpa_supplicant.conf file and add:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=DE

network={
	scan_ssid=1
	ssid="SSID"
	psk="PASSWORD"
	key_mgmt=WPA-PSK
}

2.2.2 - Activate SSH connection

• create a file ssh in /boot

2.2.3 - Change Timezone and Hostname

• Use Putty and the RPi IP-adress to connect via SSH
• raspi-config
• Change Timezone and setup a new Hostname

2.2.4 - Change standard password

• passwd
• sudo passwd

2.2.5 - Update the all installed packages

• sudo apt-get update && sudo apt-get upgrade -y && sudo apt autoremove -y && clear

2.2.6 - Cron job

• crontab -e if the script should run as pi user
• sudo crontab -e if the script should run with root privileges

example:

#variables
home_dir = /home/pi/scripts/
logfile_dir = /home/pi/logfiles/
timestamp=date +20%y_%m_%d_%H_%M_%S

# update pihole system at reboot
@reboot python ${home_dir}update_pihole.py >> ${logfile_dir}log_update_pihole_reboot_$(${timestamp}).log 2>&1

# update pihole system every 7days at 3am
0 3 */7 * * python ${home_dir}update_pihole.py >> ${logfile_dir}log_update_pihole_7days_$(${timestamp}).log 2>&1

get full cron log

cd /var/log
cat syslog.1 syslog | grep CRON

https://askubuntu.com/questions/222512/cron-info-no-mta-installed-discarding-output-error-in-the-syslog
This version works flawless!

0 3 * * * cmd  >> /some/log/file 2>&1

example:

#every 7days at 3:00 + write to a logfile
0 3 */7 * * python /home/pi/test.py >> /home/pi/test.log 2>&1

5 - Home Assistant

Größe SD-Karte: 64GB

6 - Backup Raspberry Pi SD Card

• Close GoogleDrive Application
• Use Win32DiskImager
• Create .img from SD-Card
• Compress .img file in the .bz2 format (e.g.) with 7-zip