摘要： Linuxshell的&&和||shell 在执行某个命令的时候，会返回一个返回值，该返回值保存在 shell 变量 $? 中。当 $? == 0 时，表示执行成功；当 $? == 1 时，表示执行失败。 www.2cto.com 有时候，下一条命令依赖前一条命令是否执行成功。如：在成功地执行一条命... 阅读全文

摘要： ZooKeeper是近期比较热门的一个类Paxos实现。也是一个逐渐得到广泛应用的开源的分布式锁服务实现。被认为是Chubby的开源版，虽然具体实现有很多差异。ZooKeeper概要的介绍可以看官方文档：http://hadoop.apache.org/zookeeper 这里我们重点来看下它的内部... 阅读全文

摘要： less工具也是对文件或其它输出进行分页显示的工具，应该说是linux正统查看文件内容的工具，功能极其强大。less的用法比起more更加的有弹性。在more的时候，我们并没有办法向前面翻，只能往后面看，但若使用了less时，就可以使用[pageup][pagedown]等按键的功能来往前往后翻看文... 阅读全文

摘要： InLinuxevery single file is associated with timestamps, and every file stores the information of last access time, last modification time and last cha... 阅读全文

摘要： Recently we looked across some of the most common behaviors that our community of 25,000 users looked for in their logs with a particular focus on web... 阅读全文

摘要： In general classpath is the path where JVM can find .class files and resources of your application and in this tutorial we will see how to load resour... 阅读全文

摘要： Posted byAjitesh Kumar /InJava /June 6, 2014http://vitalflux.com/eclipse-key-shortcuts-greater-developers-productivity/The article presents Eclipse Ke... 阅读全文

摘要： Incomputer science, aheapis a specializedtree-baseddata structurethat satisfies theheap property:If A is a parentnodeof B then the key of node A is or... 阅读全文

摘要： May 14th, 2014 - ByWalker Rowehttps://anturis.com/blog/nginx-vs-apache/What is the Nginx web and proxy server and how does it compare to Apache? Shoul... 阅读全文

摘要： WithApache CXF 3.0just being released a couple of weeks ago, the project makes yet another important step to fulfill theJAX-RS 2.0specification requir... 阅读全文