This tutorial describes how to setup networking using the default network manager dhcpcd included in Raspbian since 2015-05-05.
It applies to the Foundation releases of Raspberry Pi OS, Raspbian Buster, Raspbian Stretch, Raspbian Jessie and the last Raspbian Wheezy.
Buster settings are identical to Stretch.
How to setup Raspbian Networking
If you are ...
Setup a Static IP Address
Questions about setting Static IP Address are among the most common on this site. There are very many tutorials (many wrong, obsolete or incomplete).
If the reason you are contemplating a Static IP Address is you want your Pi to be assigned a predictable IP Address you can request the DHCP server to assign one.
E.g. Adding the ...
For a static IP address on an Ethernet connection:
sudo nano /etc/dhcpcd.conf
Type in the following lines on the top of the file:
This needs to be done for the recent Jessie update. /etc/network/interfaces should be left alone. ...
This vulnerability can be trivially tested:
To test whether your version of sudo is vulnerable, the following command can be used:
sudoedit -s /
A vulnerable version of sudo will either prompt for a password or display an error similar to:
sudoedit: /: not a regular file
A patched version of sudo will simply display a usage statement, for example:
To install either NOOBS or Raspberry Pi OS (previously called Raspbian) you need access to a computer with a SD Card writer; NOOBS installation requires more steps and is slower than installing Raspberry Pi OS and wastes SD Card space for the installer.
Downloads has links to the latest versions of Raspberry Pi OS and installation instructions.
There is also ...
While there are exceptions, generally stable releases of Linux distros backport important security fixes rather than packaging new upstream versions. They do this because the new upstream versions usually contain unrelated changes and every additional change brings more risk of regressions.
Unfortunately in most cases (again there are exceptions), the output ...
Short and foolproof method how to do this with:
Raspbian Jessie, Stretch, Buster
This will set a fixed IP and enable the ssh daemon:
Stick the sd card in your pc and find that it has two partitions; mount the smallest partition as /boot/
Open /boot/cmdline.txt and add ip=192.168.1.20 to the end of the line.
Create an empty file /boot/ssh
Unmount the sd ...
You can find the image of the 64 bit Raspberry Pi OS at
You can download and flash it to a SD Card like any other image of the operating system. You should be able to run it on a RasPi that supports 64 bit. As far as I know, these are RPi 3B, 3B+, and 4B. There may be others, please give me a note.
As far as I understand you want to have an encrypted storage for the complete operating system that can only be started if you enter a password to boot it. Please note that this only protects against physical access to an unpowered computer. As long as the computer is running it must decrypt the storage to be able to run, so it doesn't help when an intruder ...
One comment or idea to the subject is: don't use /etc/rc.local anymore!
Debian/Raspbian/Raspberry Pi OS uses systemd instead of deprecated SysV since years as init system to start and manage services. rc.local is a leftover from SysV and only emulated by systemd, but with serious limitations. Have a look at Compatibility with SysV.
You should use a systemd ...
First thing you should do is make your Raspberry pi's IP static. So that whenever you power up your Raspberry pi it should connect to your access point(Hotspot).
Connect to your Access point. Type ifconfig in raspberry pi's terminal and enter that IP address below, in my case it was 192.168.43.233
Start by editing the dhcpcd.conf file
sudo nano /etc/...
You can use
qemu-system-arm -machine type=raspi2 -m 1024 -kernel vmlinux -initrd initramfs
qemu-system-aarch64 -machine type=raspi3 -m 1024 -kernel vmlinux -initrd initramfs
The kernel and initramfs you can find on the first partition of your SD card or extract from the OS image for a Raspian Pi.
If you want a 64bit OS then you need to use qemu-system-...
Is it safe to uninstall Python2 and only keep Python3?
To be "safe" as in "don't break anything"? Probably not. But Python2 doesn't occupy much space - about 3MB on your SD card. And if you don't use it, it doesn't consume any resources.
It can be annoying to have python2 as the default, but you can cure that annoyance without removing ...
Installing using Raspbian Iso is much easier as and saves your SD card memory too, rather than using NOOBS
Download the ISO file from the Offical Website
Also download software such as Etcher, or Rufus to create a bootable drive
Format your drive, select the iso and extract the ISO file to your SD card
If you want to evaluate the different OS available for a Raspberry use NOOBS.
But as soon as you know which OS is best for you immediately install the plain OS without NOOBS. Why? If you have any issues with a NOOBS image and ask the community for help most of the time you will get no or very limited help. All the folks running a Raspberry in production ...
Is it even possible to install orcale jdk 14 on raspbian?
The versions on the oracle site currently all appear to be x86-64 (for version 14). Oracle java is not open source, so no one else could compile it.
So no, there is no way to install it.
I assume Tkinter requires a “window manager” from an OS that has a desktop environment.
To clarify a few terms that have a specific technical meaning in GNU/Linux based operating systems:
Window(ing) system: Software that provides the basis of a desktop GUI, which is mostly about relationships with the kernel and hardware. The predominant windowing system ...
There are a number of poorly-designed relay modules on the market.
They may work with Arduino (and TTL logic) BUT ARE A LOUSY DESIGN even for that purpose and totally unsuitable for the Pi as they are only controllable from 5V.
The schematic of a typical module is
but there are a number of variants.
The best option is to return them and purchase a module ...
The raspberry OS (Raspbian) is 32 bits, the 64bits version with the 64bits user land is in beta right now.
If you need 64 bits kernel with userland you will need other OS, like Ubuntu, Gentoo or Arc.
The thing with stick with Raspian are the updates.
The following is simplified code which prints a single reading.
Unless DHT.py is in the same directory it should be in a directory on the PYTHONPATH
A Program to read the DHTXX temperature/humidity sensors.
DHT.py download "module" from http://abyz.me.uk/rpi/pigpio/...
While searching I came across some of Joan's code (which has been recently published or updated) - this seemed to fit the bill (even though it looked too simple).
There is none of the arcane installation Adafruit required and it seems to work every time without missing readings due to timing errors.
All that is needed is a simple python module and pigpiod - ...
It seems that that one of hundred tutorials you used is somewhat outdated. You should use the tutorial given on the official Raspberry Pi site: Setting up a Raspberry Pi as a routed wireless access point, as already suggested by @Andyroo in his answer.
If you have problems with hostapd or need a some more sophisticated setup, you may have a look at Setting ...
You are likely to break things, but it would require significant effort to determine.
Why do you WANT to delete it, it uses little space and there are lots of other programs you don't use - do you plan to delete these too?
I'm not sure this will help, but:
I found during a recent exercise that user pi is not necessarily a member of the BT group. In my case, this was cured as follows:
$ sudo usermod -G bluetooth -a pi
You may need a reboot after making this change.
espeak is a speech synthesizer, it transforms text into sound but will not grab text from your screen and read it aloud. This is a function of screen reader. You have to find out which one you have and uninstall or disable it.
In case you got orca for a screen reader, it can be deactivated by removing /etc/xdg/autostart/orca-autostart.desktop.