12 2015 档案

摘要：思维导图阅读全文

posted @ 2015-12-11 22:43 That's_it 阅读(211) 评论(0) 推荐(0)

摘要：Conditional Logic on Files# 判断文件是否存在及文件类型-a file exists. #文件存在-b file exists and is a block special file. #文件存在，并且是块设备-c file exists an... 阅读全文

posted @ 2015-12-04 01:16 That's_it 阅读(960) 评论(0) 推荐(0)