Many Raspberry Pi systems are required to run without a display, keyboard or mouse, with programming and control of the Pi being achieved from a PC via a network connection. This article describes how, starting from scratch, to setup your Pi (Zero upwards) to operate like this (i.e. as a Headless Server).
- A Raspberry Pi of any flavour.
- For initial setup either a wired ethernet connection or a display and keyboard. To use a wired ethernet connection on a Pi Zero you will need a USB Ethernet adaptor.
- A PSU.
- An SD card with up to date with Raspbian Stretch Lite installed, you can download Raspbian Lite from here and load it onto the card as described in the linked installation guide.
- A PC on the network to connect to the Pi with an ssh client. This is available by default on most Linux operating systems. For Windows you may need to install PuTTY, though I see that Windows 10 may now have an ssh client built in.
First Steps, initial configuration using wired ethernet connection
- If you want to do the initial configuration using a wired ethernet connection then after burning the SD card create a file called ssh on the boot partition in order to enable ssh. You should be able to do this using the file manager on your PC as the boot partition is FAT format and can be accessed from any operating system.
- Connect the pi to your network using an ethernet cable.
- If you will be using wifi and the pi does not have onboard wifi then also plug in a wifi adaptor.
- Power up.
- Give it a minute to get going.
- From the ssh client on the pc run
ssh firstname.lastname@example.org when it asks for a password enter
raspberry. The password will not be echoed.
- If it asks for a password but won’t accept it then you have probably typed it incorrectly (check you have not got caps lock on).
- If instead of asking for a password it says something like
ssh: Could not resolve hostname raspberrypi.local: Name or service not knownthen first try unplugging the ethernet cable for ten seconds then plug it back in, wait a bit, and try again. If still no joy then login to your router and find the section on DHCP leases, hopefully there you will find the pi along with the IP address the router has given it. Then run
ssh email@example.com nn.nn.nn.nn is the IP address, obviously.
- If instead of asking for a password it says cannot connect then make sure you haven’t got another pi with the same host name (ie computer name), which is raspberrypi, on the network. If you have you will either have to disconnect it or change its host name.
- Once you have managed to login the run
raspi-configand carry on as described below.
First Steps, initial configuration using keyboard and display
- Connect a keyboard and Display and power up.
- You should see on the display the power up log scrolling past. Wait for that to complete. Eventually it should stop with a login prompt. Don’t panic if it seems to have stopped without the login prompt, on a low powered pi it may stop for tens of seconds at a couple of points during the startup.
- Once the login prompt appears type
- A password prompt should appear, enter
raspberryand Enter. The password is not echoed. You should now be logged on.
raspi-configand select Interfacing Options and enable SSH, then continue as described below.
Host and Network Configuration with raspi-config
- Note that raspi-config is a text application, even if you have a mouse connected you will not be able to use it. Use the cursor up/down arrows to step between selections, Enter to make a selection and Tab to move to other fields.
- First you should change the default password, select that option and follow the instructions.
- Next setup the network. Change the computer name (Hostname) to something other than the default of raspberrypi.
- It is probably a good idea to reboot at this point (you will be given this option on leaving network setup in order to make sure those changes have taken.
- Having rebooted you should now be able to login with your new password, if connecting
via ssh then use
ssh pi@host_name.localwhere host_name is the name you gave it above.
- Select Localisation Options and check that the correct locale appropriate for your region for your region has been automatically selected. There will be a * against the selected one (for me in the UK this is en_GB.UTF8). Then setup the timezone.
- If you want to use wifi to connect then in Network Options select Wifi and follow the instructions. Take care to enter the SSID and key correctly.
- When complete exit raspi-config and run
ifconfig. You should see the wifi interface
wlan0:and on the line below that it should show
inet nnn.nnn.nnn.nnnwhere that is the ip address the router has allocated it on the wifi. If the inet line does not appear then it has not connected to the wifi.
- Assuming that it has connected then if you have been using an ethernet connection
sudo halt), remove the ethernet connection, and power up again. You should now be able to connect again via ssh but now it will use the wifi connection.
- If you have been using a keyboard and display then you should now be able to connect
from your PC via wifi using ssh as described above in First Steps using an ethernet
connection. Assuming that works you can shutdwown (
sudo halt), disconnect the keyboard and display and put them away in the cupboard, you should not need them again.
Optional - Set a fixed IP address
You may wish to set the Pi up with a fixed IP address otherwise it may be given a different address each time it connects to the network. There are two ways of doing this.
Set a fixed address in the router. This is the preferred technique if you can do it, but many older routers either do not support this or it is flaky. If your router does support this you will need to look in the router documentation to find out how. You will need the MAC address of the network interface in the Pi, which is shown in the output from ifconfig in a line below the header line for relevant interface, so for wifi look below the line for
wlan0:and you will see something like
Where the MAC address in this case is
Set the fixed address in the Pi network configuration. If you cannot do it in the router then this is the way. First determine the IP address of the pi by running
ifconfigThat will show information on the network connections, and under the section for eth0 (if using a wired connection) or wlan0 (if using wifi) there should be a line something like
inet 192.168.1.105 netmask 255.255.255.0 broadcast 192.168.49.255
The first address here (192.168.1.105 in this case) is the current ip address of the Pi.
Check in the router config to find which addresses it will allocate dynamically
to connected devices using DHCP. Often this will be something like 192.168.1.100 upwards. Then choose an
address that is outside that range (such as 192.168.1.99 in this case). If you choose one inside the
range then you may end up with two devices with the same address which is disastrous.
The setting has to be added to the file
/etc/dhcpcd.conf. You can do this using your
favourite command line editor. If you have not got a favourite then you can use nano which is installed
by default with Raspbian. This needs to be done with root permissions, which you can do
sudo command. Run
sudo nano /etc/dhcpcd.conf
then scroll down to near the end where you will find an example static address specification. Remove the # characters (which are comment characters causing the line to be ignored) so you have something like
interface wlan0 static ip_address=192.168.1.99/24 static routers=192.168.1.1 static domain_name_servers=192.168.1.1 18.104.22.168
Obviously if it were eth0 that you were using then replace wlan0 with eth0. The address against routers and domain_name_servers should generally be that of the router, the fallback of 22.214.171.124 will be used if the router cannot supply an address
Save using Ctrl+O then Enter, and exit with Ctrl+X
Whether you have used option 1 or 2 above, now reboot using
Give it a short while to power up and then you should be able to connect using the new address.
Using whatever address you have chosen. You should still be able to connect using host_name.local
Update the Raspbian software
At some point it is a good idea to update all the software to the latest. This will take some time (dependent on your internet speed and on which model the Pi is), possibly an hour or more, so you can do this now or leave it till later if you like. To update:
sudo apt update && sudo apt upgrade
The first command updates the database describing which version of each package is available, and the second downloads the packages and updates the software. There has been a problem with updating the bluetooth driver on some boards, if the yupgrade command finishes with an error then reboot and run the complete command again and it will likely be ok.
Change the username
You may well wish to change the username from pi to something else, for security reasons if nothing else. If not then skip this section. It is preferable to change the name of the default user, rather than just adding a new one, so that the default user retains the UUID and GID 1000. If you do wish to change it then first you need to add a temporary user as you cannot change the name of a user whilst logged on as that user. I have chosen to call the user temp, but you may use what name you like. To add the temp user and add him/her to the sudo group
sudo adduser temp sudo adduser temp sudo
You will be prompted for information, most of which can be left empty. You will also be prompted
for a password for that user. Next disconnect from the pi using
exit and then reconnect as the
Check that there are no processes running as the pi user
ps -u pi
should just show a heading line and no processes. Assuming that is ok then change the username pi to, for example, fred
sudo usermod -l fred pi
and rename the home folder
sudo usermod -d /home/fred -m fred
Logout then reconnect as the new user
Finally it is necessary to change fred’s group name (which will still be pi) to fred using
sudo groupmod --new-name fred pi
It is possible to remove the temp user, but I do not generally bother. There are times when it is useful to have a second user and the space used is minimal.
That is it, all done.