Raspberry Pi #

Fresh Install #

1. Install raspberry-pi-imager on macOS.

2. Plug in a microSD card, and flash Raspberry Pi OS.

3. Add a file called ssh (no extension, no contents) to the top folder.

4. Add a file called wpa_supplicant.conf with:

   ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
   update_config=1
   country=DE
   
   network={
       ssid="wifi-name"
       psk="password"
       key_mgmt=WPA-PSK
   }
   

5. Plug the microSD to Raspberry Pi, connect to power cable.

6. Run ssh to the Pi with ssh pi@192.168.0.105 (the IP address may differ).

   • The initial password is raspberry.
   • The pre-install text editor is nano.

When connected to a screen, Pi will prompt to upgrade stuff. Don’t do it (press skip).

Use VNC Environment for Remote Desktop #

Reference: How to Use IOS Devices As a Monitor of Raspberry Pi : 6 Steps (with Pictures) - Instructables

• SSH to the Pi.
• Run $ sudo apt-get install tightvncserver
• Run $ tightvncserver
• Note down the port (1 for example)
• On a machine with screen, connect to the server (192.168.0.105:1 for example)

For auto-start at booting, add the following to $ nano ~/.bashrc

if [ -x "$(command -v tightvncserver)" ]; then tightvncserver; fi

Do the stuff from iPad:

• iOS SSH client: ‎Termius - SSH client on the App Store
• iOS VNC client is ‎VNC Viewer - Remote Desktop on the App Store

How To… #

• See OS info: $ cat /etc/os-release

• Reboot: $ sudo reboot

• Shutdown: $ sudo halt

• See list of running processes by uptime: $ ps -aux --sort -time

• SSH without a password:

  $ ssh-copy-id pi@192.168.0.105
  # Number of key(s) added:        1
  
  # Now try logging into the machine, with:   "ssh 'pi@192.168.0.105'"
  # and check to make sure that only the key(s) you wanted were added.
  $ ssh pi@192.168.0.105
  

Troubleshooting #

reason is APT is installing or removing packages #

Try in sequence:

$ sudo apt-get clean

# if that returned error
$ sudo killall apt-get
$ sudo rm /var/lib/apt/lists/lock
$ sudo rm /var/cache/apt/archives/lock
$ sudo rm /var/lib/dpkg/lock
$ sudo apt-get clean

Something 2 #

$ sudo rm /var/lib/dpkg/lock
$ sudo dpkg --configure -a

Cannot SSH after re-installation #

If see this on local machine:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

Try this:

$ ssh-keygen -R "<ip of server>" # 192.168.0.105, for example