関連ワード:  bash check if variable is empty or not set    bash check if variable is empty or not    bash check if variable is empty or not defined    bash check if variable is not null or empty    bash check if variable is not empty string    bash check if var is not empty    bash check if var is not empty string    bash test if variable is not empty    shell check if variable is not empty    bash check if variable is not null  
結果 : bash check if variable is empty or not