raspberry pi 7 inch display notes (pimoroni version)

7 inch display notes

https://forums.pimoroni.com/t/official-7-raspberry-pi-touch-screen-faq/959

this cleaned up the 3" display mess

sudo apt-get update

sudo apt-get install --reinstall libraspberrypi0 libraspberrypi-{bin,dev,doc} raspberrypi-bootloader

sudo reboot

install (or use) raspi-config to set console login

apt-get raspi-config installs if missing.

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raspberry pi camera

 

motion testing, video device test tools

https://github.com/raspberrypi/rpicam-apps/issues/628

libcamera-hello --list-cameras

sudo v4l2-ctl --list-devices

vcgencmd get_camera

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fix firefox display problem on Raspberry pi OS via xrdp remote

 

change the following 

Option 2)
By default Xrdp uses the /etc/ssl/private/ssl-cert-snakeoil.key file that is readable only by members of the “ssl-cert” group. Run the following command to add the xrdp user to the group :

Code: Select all

sudo adduser xrdp ssl-cert

Code: Select all

sudo nano /etc/X11/xrdp/xorg.conf

And find the line Option DRMDevice line and change it to
Option "DRMDevice" ""
reboot raspberry pi

reference

https://forums.raspberrypi.com/viewtopic.php?t=358637

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chrome video downloader plugin(s)

https://chromewebstore.google.com/detail/video-downloader-professi/elicpjhcidhpjomhibiffojpinpmmpil 

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update pidp11 raspberrypi lite os to have gui / desktop

 

  apt update

  apt upgrade

  apt -y install xserver-xorg

  apt -y install raspberrypi-ui-mods

  apt -y install lightdm

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firefox w/o snap ubuntu 22

Snap sucks.  Firefox under snap sucks worse.  

Blocks access via links to local storage, which might seem useful, but is poorly executed with the snap solution.  

When updates are due, locks up firefox and forces a restart at the convenience of the update.  Again seldom happens at a good time.

Rather than install a down rev of ubuntu, the build with a deb install is available, no snap.

https://askubuntu.com/questions/1399383/how-to-install-firefox-as-a-traditional-deb-package-without-snap-in-ubuntu-22

 

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gnome vnc server enable disable, replace

 

vino-server

vnc server for older ubuntu gnome

https://gitlab.gnome.org/Archive/vino

https://gitlab.gnome.org/Archive/vino/-/blob/master/docs/debugging.txt?ref_type=heads

1) Disable Vino:

       $> gconftool-2 -s /desktop/gnome/remote_access/enabled -t bool false

  2) Kill the running server:

      $> killall vino-server

  3) Run vino-server from the command line - e.g. in gdb:

       $> gdb /usr/libexec/vino-server

  4) Enable Vino again:

       $> gconftool-2 -s /desktop/gnome/remote_access/enabled -t bool true

vino documents

https://gitlab.gnome.org/Archive/vino/-/tree/master/docs?ref_type=heads

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Repositories for Raspbian (Debian Stretch) no longer supported

This is a note on the Raspbian release, but probably will need a similar action for any other ones so expired support

/etc/apt/sources.list
comment out "raspbian" entry and add "legacy" one.

-- old

deb http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi

-- should be

deb http://legacy.raspbian.org/raspbian/ stretch main contrib non-free rpi

need to do apt-update

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enable root login via gui on ubuntu 22.04

 

not recommended, but needs a

djustments to not only root login, and unlock that, but GDM (controlling gui login) as well.

 

https://medium.com/@karthiked/enable-root-login-in-ubuntu-ubuntu-22-04-70521607bc7c

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virtual box install notes debian 22.04

 

 

 notes installing virtualbox from deb

https://askubuntu.com/questions/1439468/how-to-install-virtualbox-7-0-2-from-deb-in-ubuntu-software-center-after-instal

 

  Package libqt5core5a is not installed.

virtualbox-7.0 depends on libqt5dbus5 (>= 5.14.1); however:
  Package libqt5dbus5 is not installed.
 virtualbox-7.0 depends on libqt5gui5 (>= 5.14.1) | libqt5gui5-gles (>= 5.14.1); however:
  Package libqt5gui5 is not installed.
  Package libqt5gui5-gles is not installed.
 virtualbox-7.0 depends on libqt5help5 (>= 5.15.1); however:
  Package libqt5help5 is not installed.
 virtualbox-7.0 depends on libqt5opengl5 (>= 5.0.2); however:
  Package libqt5opengl5 is not installed.
 virtualbox-7.0 depends on libqt5printsupport5 (>= 5.0.2); however:
  Package libqt5printsupport5 is not installed.
 virtualbox-7.0 depends on libqt5widgets5 (>= 5.15.1); however:
  Package libqt5widgets5 is not installed.
 virtualbox-7.0 depends on libqt5x11extras5 (>= 5.6.0); however:
  Package libqt5x11extras5 is not installed.
 virtualbox-7.0 depends on libqt5xml5 (>= 5.0.2); however:
  Package libqt5xml5 is not installed.
 

apt -y install libqt5core5a

apt -y install libqt5core5a
apt -y install libqt5dbus5
apt -y install libqt5gui5
apt -y install libqt5gui5-gles
apt -y install libqt5help5
apt -y install libqt5opengl5
apt -y install libqt5printsupport5
apt -y install libqt5widgets5
apt -y install libqt5x11extras5
apt -y install libqt5xml5

 

dpkg -i virtualbox-7.0_7.0.14-161095~Ubuntu~jammy_amd64.deb
 

optional

 

apt autoremove

 

 

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ssh cipher KexAlgorithms errors on ssh

Problem with logging in on a system via ssh. 

typical messages are such as:

Unable to negotiate with 192.168.1.196 port 22: no matching cipher found. Their offer: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com

add Cipher stanza to config for the host

Host 192.168.1.196

  Ciphers aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc

  KexAlgorithms +diffie-hellman-group1-sha1

  User jws

suggested from

https://unix.stackexchange.com/questions/459074/ssh-unable-to-negotiate-no-matching-cipher-found-is-rejecting-cbc

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vnc security failure connecting to vncserver. desktop encryption setting

This seems to fix a problem connecting to Ubuntu.  Encryption is set to a level from other systems to work with vnc viewer, so can be disabled.  Might not be useful if not on a secure channel.  But tested and works.  This goes to the desktop software on the Ubuntu server machine.  

https://askubuntu.com/questions/1126714/vnc-viewer-unable-to-connect-encryption-issue

gsettings set org.gnome.Vino require-encryption false

Error message (or such)

Unable to connect to VNC Server using your chosen security setting.

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Raspberry Pi cpu temp measurement and widget for desktop.

 raspberry pi temperature monitoring

add to menu bar.

https://linuxconfig.org/how-to-check-cpu-temperature-on-raspberry-pi

also one time reading from command line w/o gui widget.

vcgencmd measure_temp

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install apache2 on fedora

sudo dnf group install "Web Server"

alternative:

sudo dnf install httpd

sudo firewall-cmd --add-service=http --add-service=https --permanent

sudo firewall-cmd --reload

sudo firewall-cmd --add-service=http --add-service=https

https://fedoramagazine.org/install-apache-web-server-fedora/

 

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ubuntu 22 release notes

 

 

 https://linuxconfig.org/ubuntu-22-04-guide

 

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ubuntu gnome tweaks

 

 

 gnome tweaks

 

https://linuxconfig.org/how-to-install-tweak-tool-on-ubuntu-20-04-lts-focal-fossa-linux

 

 Installing Tweak Tool on Ubuntu 20.04 LTS Focal Fossa step by step instructions

$ sudo add-apt-repository universe

$ sudo apt install gnome-tweak-tool

$ gnome-tweaks

$ apt search gnome-shell-extension

$ sudo apt install  gnome-shell-extension-gsconnect

$ sudo apt install $(apt search gnome-shell-extension | grep ^gnome | cut -d / -f1) 

 

https://linuxconfig.org/how-to-install-tweak-tool-on-ubuntu-22-04-lts-jammy-jellyfish-linux

 

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notepad++ on ubuntu, alternative, notepadqq

notepad++ installation notes.

create shortcuts to notepad++ of various types

install ubuntu native alternative

https://askubuntu.com/questions/628450/how-do-i-set-notepad-as-an-editor-on-ubuntu

alternative notepadqq

sudo add-apt-repository ppa:notepadqq-team/notepadqq
sudo apt-get update
sudo apt-get install notepadqq
sudo apt-get install notepadqq-gtk

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Pi-apps / wine on raspberry pi

From page to install notepad++ and run it on the pi

https://pi-apps.io/install-app/install-notepad--on-linux-arm-device/

 

wget -qO- https://raw.githubusercontent.com/Botspot/pi-apps/master/install | bash

Use the pi-app to install notepad++.  wine will be installed if not installed by installing other x86 app.  Need to change kernel page size to 4k from default 16k, which requires a reboot, then redoing the install.  Wine install starts after that reboot.

 

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Wine / x86 on Raspberry pi

https://www.instructables.com/How-to-Set-Up-Wine-on-Raspberry-Pi-1/

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Manual set of date / time from command line

Set the timezone for the system using locale setting.  on raspberry pi, use raspi-config option to set it.

Command line as root is (example)

date -s "fri jan 20 1:34 cst"

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usb pi zero dongle and ndis networking

usb pi zero dongle and ndis networking

https://learn.adafruit.com/turning-your-raspberry-pi-zero-into-a-usb-gadget/ethernet-gadget

Notes here about setting up forwarding on the windows box, and route add on the pi zero to get out to the internet.

Another guys blog post on the subject.

https://jon.sprig.gs/blog/post/2243

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How to change raspbian / Raspberry pi OS user name

Change user name

https://raspberrytips.com/change-raspberry-pi-username/

https://www.scaler.com/topics/how-to-change-username-in-linux/

allow ssh login for root via ssh

sudo vi /etc/ssh/sshd_config

#PermitRootLogin prohibit-password

PermitRootLogin yes

set password on root

passwd root 

logout of all instances of old user

ssh to host as root

change user name

usermod -l newusername oldusername 

change user directory

usermod -d /home/new_username -m new_username

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