摘要：
mkdir -p playground/dir-{00{1..9},0{10,99},100} touch playground/dir-{00{1..9},0{10,99},100}/file-{A..Z} mkdir -p /data/mapReduceVisitorLog/{a,b,c} mk 阅读全文
摘要：
Do not use the <section> element as a generic container; this is what <div> is for, especially when the sectioning is only for styling purposes. A rul 阅读全文