SHELL IP 正则匹配 精确匹配

REGEX_IP="^(2[0-4][0-9]|25[0-5]|1[0-9][0-9]|[1-9]?[0-9])(\.(2[0-4][0-9]|25[0-5]|1[0-9][0-9]|[1-9]?[0-9])){3}$"

echo 11111.12.3.4 | grep -E $REGEX_IP --col

echo 11.12.3.4 | grep -E $REGEX_IP --col