创建2600个文件 批量创建文件 文件夹

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}

 

mkdir -p {/usr/local/mysql,/data/mysql}