上一页 1 ··· 9 10 11 12 13 14 下一页
摘要: 一、ARP的作用。 首先在window 的命令行中输入arp -a即可查看本机的arp缓存表。主机要发送数据包时,需要填充目的IP及其IP地址对应的MAC。当我们只有目的IP地址时,如何得到其对应的MAC地址? 此时ARP的作用就体现出来了。ARP就是通过IP来获取其对应的MAC地址。接下来阐述具体 阅读全文
posted @ 2017-10-11 18:38 gaoren 阅读(587) 评论(0) 推荐(0) 编辑
摘要: A graph which is connected and acyclic can be considered a tree. The height of the tree depends on the selected root. Now you are supposed to find the 阅读全文
posted @ 2017-10-11 10:51 gaoren 阅读(131) 评论(0) 推荐(0) 编辑
摘要: It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that c 阅读全文
posted @ 2017-10-10 09:39 gaoren 阅读(164) 评论(0) 推荐(0) 编辑
摘要: Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou 阅读全文
posted @ 2017-10-09 12:18 gaoren 阅读(229) 评论(1) 推荐(0) 编辑
摘要: A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number 阅读全文
posted @ 2017-10-08 19:12 gaoren 阅读(411) 评论(0) 推荐(0) 编辑
摘要: As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some ro 阅读全文
posted @ 2017-10-07 09:53 gaoren 阅读(164) 评论(0) 推荐(0) 编辑
摘要: Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The rules 阅读全文
posted @ 2017-10-06 16:25 gaoren 阅读(272) 评论(0) 推荐(0) 编辑
摘要: 这些常用工具的安装步骤还是自己记录下,以后再次用到时就会方便许多。 系统:ubuntu14.04 jdk安装。 1、从官网下载好jdk安装包 jdk-8u111-linux-x64.tar.gz 2、解压 3、配置环境变量 4、编辑完成后退出,执行指令 使java环境配置生效;运行java -ver 阅读全文
posted @ 2017-09-22 13:40 gaoren 阅读(358) 评论(0) 推荐(0) 编辑
摘要: LVM基本概念及工作原理 背景知识: 一直困惑于LVM,特地找资料查了查,终于对LVM的概念和工作原理有了深入的理解。接下来记录下。新的技术出来必定是为了改变现有的不足,所以LVM的出现是由于对现有磁盘管理的缺陷做出改进。传统的磁盘管理中,太机械式,不够灵活。比如,在window上的分区大小是固定的 阅读全文
posted @ 2017-06-15 16:01 gaoren 阅读(1342) 评论(0) 推荐(1) 编辑
摘要: 上篇介绍了DevStack如何安装部署。集成化工具有好处,但在系统重启后,OpenStack的各个服务并不会随系统重启而启动,需要利用screen来重启,接下来就记录下如何使用screen。 准备工作: 启动mysql服务: 启动rabbitmq-server服务 启动控制台的命令为: 执行指令后, 阅读全文
posted @ 2017-06-12 19:03 gaoren 阅读(2517) 评论(6) 推荐(0) 编辑
上一页 1 ··· 9 10 11 12 13 14 下一页