{"title": "\u4f7f\u7528sed\u6253\u5370\u6587\u4ef6\u4e2d\u7684\u67d0\u4e00\u884c", "update_time": "2015-01-30 13:54:26", "tags": "sed", "pid": "324", "icon": "linux.png"}
有一个大文件,需要打印一下某一个行 ``` sed -n 12345p filename ```