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# Ubuntu
## OS Installation
Download and boot the [last Ubuntu release](http://releases.ubuntu.com/19.04/ubuntu-19.04-desktop-amd64.iso).
Follow the steps :
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![img1](img/ubuntu-installation/1.png)
![img2](img/ubuntu-installation/2.png)
![img3](img/ubuntu-installation/3.png)
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The partitioning is :
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1. 256 MB : EFI partition
2. 20 GB : system partition
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![img4](img/ubuntu-installation/4.png)
![img5](img/ubuntu-installation/5.png)
![img6](img/ubuntu-installation/6.png)
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Remove the installation disk and then reboot.
Skip the welcoming window.
Don't install updates if Ubuntu asks to. The scripts will.
## OS configuration
Run a terminal and type :
```console
student@ubuntu:~$ unset HISTFILE
student@ubuntu:~$ sudo apt-get -y install curl
student@ubuntu:~$ bash <(curl -sSL raw.githubusercontent.com/01-edu/public/master/scripts/kickstart.sh)
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[...]
Ask for student user password (will be removed later)
[...]
Long installation/configuration process then reboots
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```
The system is now read-only, every data is written to a temporary partition.
The session is password-less.
To gain a superuser terminal, use SSH :
```console
user@remote:~$ ssh -p521 root@IP_ADDRESS
```
To gain access with read/write access to the filesystem, use this command :
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```console
root@ubuntu:~# overlayroot-chroot
INFO: Chrooting into [/media/root-ro]
root@ubuntu:/#
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```