正则匹配 IP

SHELL下的正则匹配

egrep '^((2(5[0-5]|[0-4][[:digit:]])|1[[:digit:]]{2}|[1-9][[:digit:]]|[[:digit:]]).){3}(2(5[0-5]|[0-4][[:digit:]])|1[[:digit:]]{2}|[1-9][[:digit:]]|[[:digit:]])$' file1
原文地址:https://www.cnblogs.com/persisit/p/13687538.html