How to install in Ubuntu Server 25.10 (Questing Quokka) ?

[zzzzenzephyr]

Environment

• Ubuntu Server 25.10 (Questing Quokka)
• First attempting installation with:

. /etc/os-release
sudo apt install -t ${VERSION_CODENAME}-backports cockpit

• Second attempting installation with:

. /etc/os-release
sudo apt install cockpit/${VERSION_CODENAME}-backports

Observed Behavior

• First attempting terminal output:

Error: The value 'questing-backports' is invalid for APT::Default-Release as such a release is not available in the sources

• Second attempting terminal output:

Package cockpit is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Error: Release 'questing-backports' for 'cockpit' was not found

Expected Behavior

cockpit should install successfully and be accessible via domain/IP address with default port.

Steps to Reproduce

1. Fresh Ubuntu Server 25.10 install
2. Update and upgrade repository
3. Run code on Environment

[Venefilyn]

Heya, there doesn't seem to be a questing-backports repo. Likely as Ubuntu 25.10 is new

https://packages.ubuntu.com/search?suite=questing&searchon=sourcenames&keywords=cockpit

Try

sudo apt install -t ${VERSION_CODENAME} cockpit