関連ワード:  bash check if string contains substring    bash check if string contains substring case-insensitive    bash test if string contains substring    shell check if string contains substring    linux check if string contains substring    bash check that string contains substring    bash script check if string contains substring    linux bash check if string contains substring    bash check if multiline string contains substring    bash check if string contains multiple substrings  
結果 : bash check if string contains substring