Rust Installation Error

I got Error While installing Rust under Xubuntu Os

i get

rustup: gpg available. signatures will be verified
rustup: downloading manifest for 'stable'
rustup: command failed: curl -s -f -O
rustup: couldn't download checksum file ''

Why this is ?
how to seet manually Rust Path in Ubuntu .?

That looks like your internet connection is failing. The install script can't connect to the internet, and is failing. If you just try running the command again, does it work?

As for setting manual path:

If you want to install just to your own home rather than to the whole system, download and use:

./ --disable-ldconfig --disable-sudo --prefix=./rust-install-directory/