Nicolas No, I did not think that this could be a solution to the problem. I copied the microSD and started the MoodleBox. Because it had no wifi I connected it via ethernet.
iMac:~ krause$ ssh moodlebox@192.168.1.136
The authenticity of host '192.168.1.136 (192.168.1.136)' can't be established.
ECDSA key fingerprint is SHA256:9FB+PBoc//RTvL2swlBaENo8kzfylkUglDhTlOwing8.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.136' (ECDSA) to the list of known hosts.
moodlebox@192.168.1.136's password:
Linux moodlebox 4.19.118-v7+ #1311 SMP Mon Apr 27 14:21:24 BST 2020 armv7l
This is MoodleBox version 3.7.0, 2020-06-15.
MoodleBox is made by Nicolas Martignoni, https://github.com/martignoni/.
Please read the documentation at https://moodlebox.net/.
Last login: Sun Jun 14 23:45:00 2020 from 192.168.1.100
Wi-Fi is currently blocked by rfkill.
Use raspi-config to set the country before use.
moodlebox@moodlebox:~ $ sudo rfkill unblock wlan
moodlebox@moodlebox:~ $ sudo crontab -e
Select an editor. To change later, run 'select-editor'.
1. /bin/nano <---- easiest
2. /usr/bin/vim.tiny
3. /bin/ed
Choose 1-3 [1]: 1
No modification made
moodlebox@moodlebox:~ $ sudo halt
Connection to 192.168.1.136 closed by remote host.
Connection to 192.168.1.136 closed.
iMac:~ krause$ ssh moodlebox@192.168.1.136
moodlebox@192.168.1.136's password:
Linux moodlebox 4.19.118-v7+ #1311 SMP Mon Apr 27 14:21:24 BST 2020 armv7l
This is MoodleBox version 3.7.0, 2020-06-15.
MoodleBox is made by Nicolas Martignoni, https://github.com/martignoni/.
Please read the documentation at https://moodlebox.net/.
Last login: Tue Jun 16 07:05:24 2020 from 192.168.1.196
moodlebox@moodlebox:~ $