2022-1104 updated

Uncompress *.xz file using 7-Zip uncompression in Windows (right click, 7-Zip - Open archive - drag *.img file over to destination location)
Example compressed  : 2022-09-22-raspios-bullseye-armhf-lite.img.xz
Example uncompressed: 2022-09-22-raspios-bullseye-armhf-lite.img

Use balenaEtcher Portable (https://www.balena.io/etcher/) to write *.img image to MicroSD card
Example: 2022-09-22-raspios-bullseye-armhf-lite.img

From MicroSD card "boot" partition (was Q: in my case), create:
"ssh" file that is empty to allow remote ssh access
"userconf" to allow a userID to login.
userconf file needs the following:
username:encrypted-password

Create encrypted-password for userconf file as such:
echo "normal-password" | openssl passwd -6 -stdin

Disconnect MicroSD card and install in Rasberry Pi

Check router DHCP Lease list and snapshot currently leased IPs
(IP - DHCP Server - Leases)

Power on raspberry pi connected to network cable

Check router DHCP Lease list and compare to previous snapshot currently leased IPs to find new raspberry pi IP
(IP - DHCP Server - Leases)

Change current password:
passwd

# Change configurations via command line menu system:
sudo raspi-config

# Change hostname manually (edit files then reboot):
sudo su -
vi /etc/hostname
vi /etc/hosts
# or Change Hostname with command line menu system:
raspi-config
1 System Options
S4 Hostname

# Change to root and set static IP address info:
sudo su -
vi /etc/dhcpcd.conf
# Example static IP configuration:
#interface eth0
#static ip_address=192.168.0.10/24
#static ip6_address=fd51:42f8:caae:d92e::ff/64
#static routers=192.168.0.1
#static domain_name_servers=192.168.0.1 8.8.8.8 fd51:42f8:caae:d92e::1
interface eth0
static ip_address=192.168.1.11/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.1

Update raspberry pi zero:
apt update
apt upgrade
# or: apt full-upgrade
# If Raspberry Pi 4:
rpi-eeprom-update

Enable "ll" directory listing:
vi .bashrc
alias ll='ls -lA'

Enable private/public key login:
mkdir -m 700 .ssh
vi .ssh/authorized_keys
chmod 600 .ssh/authorized_keys

Set localisation, timezone, WLAN country
raspi-config
5 Localisation Options - Change Locale (en_US.UTF-8 then en_US.UTF-8)
5 Localisation Options - Change Time Zone (US - Central)
5 Localisation Options - Change Keyboard Layout
5 Localisation Options - Change WLAN Country (US United States)

Fix date formatting:
--
Example old date display:
$ date
Fri  4 Nov 18:18:25 CDT 2022
Example new date display:
$ date
Sat Aug 22 2020 09:17:02 PM CDT
--
vi /usr/share/i18n/locales/en_US
Change next line to following line:
date_fmt "%a %d %b %Y %r %Z"
change to:
date_fmt "%a %b %d %Y %r %Z"
Then run:
dpkg-reconfigure locales

Reboot to apply updates:
reboot



Show os version of Raspberry Pi:
cat /etc/os-release
or
lsb_release -a

apt commands:
apt install (package)
apt remove (package)
apt search (package)
apt show (package)
apt list
apt edit-sources



Force HDMI:
-----------
Add these two lines to /boot/config.txt and reboot Raspbmc:
hdmi_force_hotplug=1
hdmi_drive=2

hdmi_force_hotplug=1 sets the Raspbmc to use HDMI mode even if no HDMI monitor is detected.
hdmi_drive=2 sets the Raspbmc to normal HDMI mode (Sound will be sent if supported and enabled). Without this line, the Raspbmc would switch to DVI (with no audio) mode by default.


WiFi:
-----------
iwlist wlan0 scan
iwconfig




Temperature example script:
---------------------------------
$ cat temps.sh
#!/bin/bash

cpu1=$(cat /sys/class/thermal/thermal_zone0/temp)
cpu=$((cpu1/1000))

gpu=`/opt/vc/bin/vcgencmd measure_temp | sed s/temp=//g`

voltage=`/opt/vc/bin/vcgencmd measure_volts | sed s/volt=//g`

echo "$(date) @ $(hostname)"
echo "---------------------------------------------"
echo "CPU = $cpu'C"
echo "GPU = $gpu"
echo "Voltage = $voltage"






OLD:
------------------------------------------
Remove then re-attach MicroSD card to computer

Old Login defaults l:pi p:raspberry

Set localisation, timezone, WLAN country
raspi-config
4 Localisation Options - Change Locale (en_US.UTF-8 then en_US.UTF-8)
4 Localisation Options - Change Time Zone (US - Central)
4 Localisation Options - Change Keyboard Layout
4 Localisation Options - Change WLAN Country (US United States)