Shell腳本中判斷字符串是否被包含在內並且使用grep 精確匹配

str1="abcdefgh"
str2="def"

result=$(echo $str1 | grep "${str2}")

if [[ "$result" != "" ]];then
    echo "包含"
else
    echo "不包含"
fi

如果精確的匹配到def呢

其實答案很簡單，用grep –w "def" 或者是grep "\<def\>"都可以實現

-w, --word-regexp         強制 PATTERN 僅完全匹配字詞

str1="abcdefgh"
str2="def"

result=$(echo $str1 | grep -w "${str2}")

if [[ "$result" != "" ]];then
    echo "包含"
else
    echo "不包含"
fi