openblas, lapack, blas 등은 벡터 연산 등에 사용되는 서브프로그램(라이브러리)로,

하모니카에 기본으로 설치되어 있지는 않습니다.

보통 python 등을 설치할때 같이 설치되곤 하는데요.

아마도 google님이 다른 패키지 설치하시면서 의존성 이슈로 같이 설치되지 않았나 싶습니다.

(python → lapack → openblas)

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$ apt show libopenblas-base

Package: libopenblas-base

State: not installed

Version: 0.2.8-6ubuntu1

Priority: 옵션

Section: universe/libs

Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>

Architecture: amd64

Uncompressed Size: 46.2 M

Depends: libc6 (>= 2.4)

Suggests: liblapack3

Conflicts: libopenblas-base

Breaks: libatlas3gf-base (< 3.8.4-4), libatlas3gf-base (< 3.8.4-4), libblas3gf

        (< 1.2.20110419-3), libblas3gf (< 1.2.20110419-3)

Replaces: libatlas3gf-base (< 3.8.4-4), libatlas3gf-base (< 3.8.4-4), libblas3gf

          (< 1.2.20110419-3), libblas3gf (< 1.2.20110419-3)

Provides: libblas.so.3

Description: Optimized BLAS (linear algebra) library based on GotoBLAS2

 OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version. 

 Unlike Atlas, OpenBLAS provides a multiple architecture library. 

 All kernel will be included in the library and dynamically switched to the best

 architecture at run time (only on x86 arches). 

 For more information on how to rebuild locally OpenBLAS, see the section:

 "Building Optimized OpenBLAS Packages on your ARCH" in README.Debian

Homepage: https://github.com/xianyi/OpenBLAS

패키지 설치 여부를 확인하는 방법은 아래와 같습니다.

① apt search 명령으로 해당 단어가 포함된 정확한 패키지명을 확인한다.

$ apt search openblas

p   libopenblas-base                - Optimized BLAS (linear algebra) library ba

p   libopenblas-base:i386           - Optimized BLAS (linear algebra) library ba

p   libopenblas-dev                 - Optimized BLAS (linear algebra) library ba

p   libopenblas-dev:i386            - Optimized BLAS (linear algebra) library ba