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ubuntu-18.04.2-preinstalled-server-arm64+raspi4+kvm.img 2019-08-15

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Ubuntu-18.04.2 preinstalled server arm64 für den neuen Raspberry 4.

Der Arbeitsspeicher mit dieser Version ist auf 1GB begrenzt, da durch einen Bug mit 64Bit Versionen noch nicht mehr genutzt werden kann.

Configuration
Default User / Password
The username and password for your initial login to Ubuntu Server will be:

user: ubuntu
password: ubuntu
You will be required to change your password after logging in for the first time. Make sure on the prompt you enter the current “ubuntu” password before typing in your new password or the device will kick you out completely and you’ll have to log in again.

Fix apt-get update / Prevent Further Updates
If you try to apt-get update now it will try to update your firmware with older firmware from the Ubuntu repository. The workaround for now is to remove that package so it keeps your existing firmware. Make a note to remember you did this step as later on we will want to reenable updates from the repository once support has been added.

sudo apt remove flash-kernel initramfs-tools
You may now run sudo apt-get update && sudo apt-get upgrade but don’t use dist-upgrade yet because the kernels in the repository it will update you to don’t support the Pi 4 yet. But this should get you all up to date on the packages!

Once the firmware in the apt repositories has been updated for the Pi 4 it will be safe to reinstall initramfs-tools and let it update through the normal process again.



Set Time Zone
To configure the correct time zone for Ubuntu Server use the following command:

sudo dpkg-reconfigure tzdata
This will take you to a very easy to follow menu to select your correct time zone and applies it to the system.

Update System
For best stability, security and performance you should immediately update your system and packages to the latest version. This will also grab all of the latest fixes/improvements making your Raspberry Pi Ubuntu experience much better.

This part is easy. Type:

sudo apt-get update && sudo apt-get upgrade

Change Default GPU Memory Split
The default amount of memory allocated to the GPU on the Raspberry Pi is around 76 MB of our 1 GB. In 2 GB and 4 GB models the amount gained from this is negligible but is still worth it for the 1 GB model.

If you type the command “free” you will see that your Raspberry Pi is missing this memory under the “total” column. We can reclaim most of this memory back by setting the GPU memory split to 16 MB. If you are planning on installing a GUI in the future you should not make this change.

This option is set in the config.txt file. It’s exactly the same file as Raspbian uses but it is located at /boot/firmware/config.txt instead of /boot/config.txt. Open config.txt with the following command:

sudo nano /boot/firmware/config.txt
We will add the following line at the bottom of config.txt:

gpu_mem=16
Press Ctrl + X and type yes to save the file. Now restart the Pi by typing

sudo reboot
After the reboot finishes type “free” again and you will see that your total available memory has increased and can now be used by the system and your applications!

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