virsh net-autostart networkname leads to the above mentioned Error Message. The solution is stupid but it works...

virsh net-edit networkname go to the end and add some empty lines, save the file and quit.

virsh net-autostart networkname works like charm....

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Set org.gnome.Calendar.desktop as the default for text/calendar

gio mime text/calendar org.gnome.Calendar.desktop

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LXD/LXC

Fire up an Debian 10 in a LXC Container and name it "docker-registry
lxc launch images:debian/10 docker-registry

Adjust the behavior of the LXC Container, otherwise docker wont't be able to work

lxc config set docker-registry security.nesting true
lxc config set docker-registry security.privileged true

cat <

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Find the current Disk Usage by journalctl journalctl --disk-usage

The safest way to remove unessesary entries is via the (means leave this amout left)
journalctl --vacuum-size=512M

After that you can verify if everything is still intact: journalctl --verify

Or as generell setting in /etc/systemd/journald.conf

SystemMaxUse=512M
...

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Version pre 2.x of keepalive which are shipped with the Ubuntu18 Repository will crash. You'll have to configure a higher Version from source by yourself.

https://github.com/acassen/keepalived/issues/836

https://www.keepalived.org/download.html

"/lib/systemd/system/keepalived.service"

[Unit]
Description=LVS and VRRP High Availabi...

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