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本文将介绍系统管理两个区别层次Unix Power ToolsShelley Powers、Jerry Peek、Tim O'Reilly 和 Mike Loukides 著采用种简单易读方式介绍了系统管理基本知识这对于系统管理人员来说是本必读书籍Analytical Network and AdministrationMark Burgess 著向那些具有坚实计算机科学和数学理论知识系统管理员介绍些高级主题请参阅 Ted Zlatanov Cul [阅读全文] [PDF]
  如果你返回文件中剩余记录如果你处于文件尾则返回空表:      @records = ;       (@records) {      pr "There were ", scalar(@records), " records read.\n";      }      在下面步中进行赋值和测试两项工作:       (@records = ) {      pr "There were ", scalar(@records), " re [阅读全文] [PDF]
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