E: Could not get lock /var/lib/apt/lists/lock. It is held by process 31656 (apt) ■ linux update 관련 명령 실행 시 발생하는 에러 오류가 발생한 경로를… 더 보기 »E: Could not get lock /var/lib/apt/lists/lock. It is held by process 31656 (apt)