When hosting a Linux server at Strato? And Ubuntu 20.04.4 won’t update?

Edit the /etc/apt/sources.list

# vim /etc/apt/sources.list

And ad the following lines to the file:

 

deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner

 

# apt update

# apt upgrade

Please remind, do not upgrade the kernel on a shared server hosted at Strato!!

Check the  virtualization platform when hosted on?

Virtuozzo?? NO do not upgrade the kernel.

KVM??  Yes you can upgrade the kernel.

 

Before update ore changes, always create backups