関連ワード:  bash check environment variable is set    bash if environment variable is set    bash check if environment variable is set    bash check if environment variable is set and not empty    bash check if environment variable is set to true    bash script check environment variable is set    bash check if environment variable is set to value    bash if environment variable is defined    linux bash check if environment variable is set    shell check if environment variable is set  
結果 : bash check environment variable is set