etcd README scripts are wrong, here's a replacement:

[SamuelMarks]

Bug report criteria

• This bug report is not security related, security issues should be disclosed privately via etcd maintainers.
• This is not a support request or question, support requests or questions should be raised in the etcd discussion forums.
• You have read the etcd bug reporting guidelines.
• Existing open issues along with etcd frequently asked questions have been checked and this is not a duplicate.

What happened?

https://github.com/etcd-io/etcd/releases has a guide but it's wrong

What did you expect to happen?

The guide to be correct

How can we reproduce it (as minimally and precisely as possible)?

Use correct quoting and support tar or zip based on OS

Anything else we need to know?

Solution that works on all platforms:

#!/bin/sh

ETCD_VERSION='v3.6.0-rc.5'
# choose either URL
GOOGLE_URL='https://storage.googleapis.com/etcd'
GITHUB_URL='https://github.com/etcd-io/etcd/releases/download'
DOWNLOAD_URL="${GOOGLE_URL}"

uname_lower="$(printf '%s' "$(uname)" | tr '[:upper:]' '[:lower:]')"
name='etcd-'"${ETCD_VERSION}"'-'"${uname_lower}"'-'"${ARCH_ALT}"
archive="${name}"
is_tar=1
case "${uname_lower}" in
  'darwin'|'windows')
    is_tar=0;
    archive="${archive}"'.zip' ;;
  *) archive="${archive}"'.tar.gz' ;;
esac

rm -rf '/tmp/'"${archive}" '/tmp/etcd-download-test'
mkdir -p '/tmp/etcd-download-test'
curl -L "${DOWNLOAD_URL}"'/'"${ETCD_VERSION}"'/'"${archive}" -o '/tmp/'"${archive}"
if [ "${is_tar}" -eq 1 ]; then
  tar xzvf '/tmp/'"${archive}" -C '/tmp/etcd-download-test' --strip-components=1
else
  unzip '/tmp/'"${archive}" -d '/tmp'
  d='/tmp/'"${name}"
  set +f
  mv "${d}"'/'* '/tmp/etcd-download-test'
  set -f
  rm -r "${d}"
fi
rm -f '/tmp/'"${archive}"

Etcd version (please run commands below)

$ etcd --version
# paste output here

$ etcdctl version
# paste output here

Etcd configuration (command line flags or environment variables)

paste your configuration here

Etcd debug information (please run commands below, feel free to obfuscate the IP address or FQDN in the output)

$ etcdctl member list -w table
# paste output here

$ etcdctl --endpoints=<member list> endpoint status -w table
# paste output here

Relevant log output