Rustup install fails on ubuntu 20.10

leder@leder-Standard-PC-Q35-ICH9-2009:~$ LANG=C curl --proto '=https' --tlsv1.2 -sSf | sh
info: downloading installer
curl: (23) Failure writing output to destination
rustup: command failed: downloader /tmp/tmp.BCJAzIMQVb/rustup-init x86_64-unknown-linux-gnu

any idea?

I'm not sure what might be causing the error, but here are some things to try. You can pass a -v argument to the downloader like this to enable verbose output, which might help figure out the cause of the problem:

LANG=C curl --proto '=https' --tlsv1.2 -sSf | sh -s -- -v

You could also try downloading and running rustup-init from here instead of using the script: Other installation methods - The rustup book