你这个可用多个方法,最简单的可用grep，如s="Connections: authenticated: 10.0.115.172::56498, as admin (Full access)" echo $s | grep -E -o "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+::[0-9]+"结果10.0.115.172::56498，关于更多正则的表示，请查阅书籍《Linux就该这么学》
