RH184:RHEL5虚拟化入门与基础安装

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RH184-RHEL5-en-2-20070907是Red Hat Enterprise Linux (RHEL)虚拟化教程的一部分,专为高级用户和IT专业人士设计,重点关注于RHEL5版本的虚拟化技术。这份文档主要关注两个关键单元:介绍虚拟化及其概念以及基本的paravirtualized domain(PV域)安装。 在第一单元"Introduction to Virtualization"(虚拟化入门)中,讲解了虚拟化的基础概念,包括系统虚拟化、虚拟化术语的解释,如全虚拟化(Full Virtualization)、仿真与动态翻译(Emulation and Dynamic Translation)、以及paravirtualization(半虚拟化)。作者通过四个典型使用场景来阐述虚拟化的优势:服务器整合(Consolidation)、资源隔离(Compartmentalization)、开发与测试环境构建(Development and Testing),以及虚拟应用容器(Virtual Appliances)的创建。此外,还介绍了其他类型的虚拟化技术,强调了它们各自的适用性和优缺点。 第二单元"Basic Paravirtualized Domain Installation"(基本PV域安装)聚焦于Xen这个流行的开源虚拟化平台。这部分内容详细讲解了Xen架构,硬件兼容性要求,以及在RHEL5环境中设置和管理PV域的步骤。读者可以在这里学习如何安全地配置和部署虚拟机,以便在实际环境中实现高效的资源利用和管理。 RH184-RHEL5-en-2-20070907文档提供了一个全面的指南,帮助读者理解虚拟化技术的核心原理,掌握如何在RHEL环境中实施和优化paravirtualized解决方案,对希望在企业级环境中采用虚拟化技术的IT专业人员来说具有很高的实用价值。它不仅涵盖了理论知识,也包含实践操作,使学习者能够将所学应用到实际工作场景中。

为什么会这样[user_mongo@nosql01 replicaset]$ cd /opt [user_mongo@nosql01 opt]$ ll total 0 drwxr-xr-x. 3 root root 25 Mar 16 17:08 servers drwxr-xr-x. 2 root root 51 Mar 16 17:10 software [user_mongo@nosql01 opt]$ tar -zxvf /opt/software/mongodb-linux-x86_64-rhel70-4.4.12.tgz -C /opt/servers/mongodb_demo/replicaset/ mongodb-linux-x86_64-rhel70-4.4.12/LICENSE-Community.txt tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/LICENSE-Community.txt: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/MPL-2 tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/MPL-2: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/README tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/README: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/THIRD-PARTY-NOTICES tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/THIRD-PARTY-NOTICES: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/bin/install_compass tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/bin/install_compass: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/bin/mongo tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/bin/mongo: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/bin/mongod tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/bin/mongod: Cannot open: No such file or directory mongodb-linux-x86_64-rhel70-4.4.12/bin/mongos tar: mongodb-linux-x86_64-rhel70-4.4.12: Cannot mkdir: Permission denied tar: mongodb-linux-x86_64-rhel70-4.4.12/bin/mongos: Cannot open: No such file or directory tar: Exiting with failure status due to previous errors [user_mongo@nosql01 opt]$ tar -zcvf /opt/software/mongodb-linux-x86_64-rhel70-4.4.12.tgz -C /opt/servers/mongodb_demo/replicaset/ tar: Cowardly refusing to create an empty archive Try `tar --help' or `tar --usage' for more information.

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