関連ワード:  check if variable is empty in shell script    check if variable is null in shell script    check if variable is empty in bash script    check if variable is not empty in shell script    check if variable is null or empty in shell script    check if variable is not null in shell script    if condition to check if variable is not empty in shell script    check if variable is empty in linux    check if variable is empty in unix    shell script check if variable is empty string  
結果 : check if variable is empty in shell script