Ubuntu 20.04 sd card to usb drive complete move Raspi4

 So far the only suitable guide for moving an existing ubuntu 20.04. installation completely to USB boot:

https://www.instructables.com/Raspberry-Pi-4-USB-Boot-No-SD-Card/

influx Install and backup/move

 Influx install:

https://www.verdrahtet.info/2020/02/14/installation-von-influxdb-grafana-inkl-verbindung-zu-iobroker/

Influx Backup:

https://forum.iobroker.net/post/429747

Also ich mache mein Backup von der normalen Linux Kommandozeile aus und nicht unter der Influxdb-Konsole...

Das schaut dann so aus bei meiner Datenbank die iobroker heißt:

root@DietPi:~# sudo influxd backup -portable -database iobroker -host 127.0.0.1:8088 /tmp/iobroker_influx_backup
2020/05/10 20:28:39 backing up metastore to /tmp/iobroker_influx_backup/meta.00
2020/05/10 20:28:39 backing up db=iobroker
2020/05/10 20:28:39 backing up db=iobroker rp=autogen shard=49 to /tmp/iobroker_influx_backup/iobroker.autogen.00049.00 since 0001-01-01T00:00:00Z
2020/05/10 20:28:40 backing up db=iobroker rp=autogen shard=50 to /tmp/iobroker_influx_backup/iobroker.autogen.00050.00 since 0001-01-01T00:00:00Z
2020/05/10 20:28:40 backing up db=iobroker rp=autogen shard=51 to /tmp/iobroker_influx_backup/iobroker.autogen.00051.00 since 0001-01-01T00:00:00Z
2020/05/10 20:28:40 backing up db=iobroker rp=autogen shard=52 to /tmp/iobroker_influx_backup/iobroker.autogen.00052.00 since 0001-01-01T00:00:00Z
2020/05/10 20:28:41 backing up db=iobroker rp=autogen shard=53 to /tmp/iobroker_influx_backup/iobroker.autogen.00053.00 since 0001-01-01T00:00:00Z
2020/05/10 20:28:41 backing up db=iobroker rp=autogen shard=54 to /tmp/iobroker_influx_backup/iobroker.autogen.00054.00 since 0001-01-01T00:00:00Z
2020/05/10 20:28:42 backup complete:
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.meta
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.s49.tar.gz
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.s50.tar.gz
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.s51.tar.gz
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.s52.tar.gz
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.s53.tar.gz
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.s54.tar.gz
2020/05/10 20:28:42 /tmp/iobroker_influx_backup/20200510T182839Z.manifest
root@DietPi:~#

Vorher muss aber die Influxdb.config bearbeitet werden...:

Hatte mich damals hiernach gerichtet und entsprechend meinen Anforderungen umgesetzt...:

https://solaranzeige.de/phpBB3/viewtopic.php?t=310

Einen Restore hatte ich auch schon gemacht - ging problemlos.

https://solaranzeige.de/phpBB3/viewtopic.php?t=310

Recently I got an error on influxdb. The log file was not clearly stating an error. But Health target was not reached. Starting the service stated to read the error log, journalctl -xe .

Finally I saw the config pattern:

LimitNOFILE=65536 which basically could limit the number of files the service oder user??? can occupy.

After commenting with # . The service starts succesfully.

This is not due to the case having more than 65k open, but perhaps in contradiction to system limits .

This solved my issues on ubuntu but not on my original raspbian.

ESP2866-01 Wiring

 Some ESP8266-01 Boards need the Ping CH_PD pulled, high, otherwise it is in rest mode.

Pulled high means putting a 10kOhm resistor between CH_PD and VCC.

Tasmota Time settings

 ntpserver1 yourntpgoeshere

Germany: Timezone 99

https://tasmota.github.io/docs/Commands/

ESP8266 via MQTT Iobroker

 https://www.smarthome-tricks.de/allgemein/nodemcu-esp8266-sensoren-an-iobroker-ueber-mqtt/

https://www.smarthome-tricks.de/esp8266/pubsubclient-fuer-mqtt-mit-benutzername-passwort-und-port/

https://github.com/knolleary/pubsubclient

Grafana View Collection

 Internet Connection View:

https://www.smarthome-tricks.de/grafana/5-3-grafana-dashboard-fuer-die-internet-geschwindigkeit/

Information on Linux systems live

 Process overview: top, htop, nmon

Disk/read/write: iotop -o -b -d 10

Beware ! Minecraft Windows 10 Edition from Microsoft store

 To my knowledge there is no satisfactory solution to share a Minecraft Win 10 licence from MS Store on a Win10 Computer among different users with differen MS Store accounts.

No App Sharing as known from Apple or Google possible. 

The MS Solution is to buy the licence X-Times!

Not Cool!

Granting Access for non Root to GPIOs

https://stackoverflow.com/questions/30938991/access-gpio-sys-class-gpio-as-non-root

Anleitung dafür Rechte auf GPIOs zu setzen aus:

http://www.netzmafia.de/skripten/hardware/RasPi/RasPi_GPIO_Shell.html

Datei:

# /etc/udev/rules.d/80-gpio-noroot.rules

# Zugriff auf GPIO ohne root-Rechte ermoeglichen

#

# Gruppe aendern

SUBSYSTEM=="gpio", RUN+="/bin/chown -R root.gpio /sys/class/gpio"

SUBSYSTEM=="gpio", RUN+="/bin/chown -R root.gpio /sys/devices/virtual/gpio"

# Sticky-Bit setzen

SUBSYSTEM=="gpio", RUN+="/bin/chmod g+s /sys/class/gpio"

SUBSYSTEM=="gpio", RUN+="/bin/chmod g+s /sys/devices/virtual/gpio"

# Zugriffsrechte setzen

SUBSYSTEM=="gpio", RUN+="/bin/chmod -R ug+rw /sys/class/gpio"

SUBSYSTEM=="gpio", RUN+="/bin/chmod -R ug+rw /sys/devices/virtual/gpio"

#Jetzt müssen Sie nur noch den udev-Daemon von den Änderungen wissen lassen (beim nächsten Reboot passiert das dann automatisch):

sudo service udev restart

sudo udevadm trigger --subsystem-match=gpio

Iobroker zur Gruppe gpios hinzufügen:

sudo usermod -aG gpio iobroker

Nun ist folgendes passiert: 

Die Rechte auf die GPios wurden auf die Gruppe GPIO erweitert.

Dies wird bei jedem Boot wiederholt.

Der Nutzer Iobroker wurde dieser Gruppe hinzugefügt und kann nach einem Neustart nun die GPios schalten.

Ubuntu Blocking Packages from update

 https://askubuntu.com/questions/18654/how-to-prevent-updating-of-a-specific-package

dpkg

Put a package on hold:

echo "<package-name> hold" | sudo dpkg --set-selections

Remove the hold:

echo "<package-name> install" | sudo dpkg --set-selections

Display the status of your packages:

dpkg --get-selections

apt
Hold a package:
sudo apt-mark hold <package-name>
Remove the hold:
sudo apt-mark unhold <package-name>
Show all packages on hold:
sudo apt-mark showhold