Speedtest ubuntu 설치시 apt 오류 해결법

언제 부턴가.... ubuntu 에서 speedtest 설치를 하고자 할때 아래와 같이 오류가 발생하고 있다.

Err:3 https://packagecloud.io/ookla/speedtest-cli/ubuntu focal InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E61C2AB9A6D1557
Reading package lists... Done
W: GPG error: https://packagecloud.io/ookla/speedtest-cli/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E61C2AB9A6D1557

어떤 이들은 apt 키값이 없기때문에 다운 받아보라는 솔루션을 제공하고 있지만 오류는 해결 되지 않았다.

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8E61C2AB9A6D1557

설치 스크립트를 확인해 본 바로는.....

  gpg_key_url="https://packagecloud.io/ookla/speedtest-cli/gpgkey"
  apt_config_url="https://packagecloud.io/install/repositories/ookla/speedtest-cli/config_file.list?os=${os}&dist=${dist}&source=script"

  apt_source_path="/etc/apt/sources.list.d/ookla_speedtest-cli.list"
  gpg_keyring_path="/usr/share/keyrings/ookla_speedtest-cli-archive-keyring.gpg"

path에 저장된 pgp 및 apt소스 경로를 보면 ... 

 [apt_source_pat]

# this file was generated by packagecloud.io for
# the repository at https://packagecloud.io/ookla/speedtest-cli

deb [signed-by=/etc/apt/keyrings/ookla_speedtest-cli-archive-keyring.gpg] https://packagecloud.io/ookla/speedtest-cli/ubuntu/ focal main
deb-src [signed-by=/etc/apt/keyrings/ookla_speedtest-cli-archive-keyring.gpg] https://packagecloud.io/ookla/speedtest-cli/ubuntu/ focal main

패키지 다운을 위한 gpg 타겟을 /etc/.... 밑의 경로에 잡았다.

설치스크립트 상 .... gpg key 다운로드 경로는 "/usr/share/keyrings/ookla_speedtest-cli-archive-keyring.gpg" 이곳 이었는데... 

해결법 !!

sudo cp /usr/share/keyrings/ookla_speedtest-cli-archive-keyring.gpg /etc/apt/keyrings/ookla_speedtest-cli-archive-keyring.gpg

끝!