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User Mode Linux als Buch

User Mode Linux

von Jeff Dike
Sprache: Englisch.
Buch (kartoniert)
With User Mode Linux you can create virtual Linux machines within a Linux computer and use them to safely test and debug applications, network services, and even kernels. You can try out new distributions, experiment with buggy software, and even tes... weiterlesen
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User Mode Linux als Buch
Titel: User Mode Linux
Autor/en: Jeff Dike

ISBN: 0131865056
EAN: 9780131865051
Sprache: Englisch.

April 2006 - kartoniert - 328 Seiten


With User Mode Linux you can create virtual Linux machines within a Linux computer and use them to safely test and debug applications, network services, and even kernels. You can try out new distributions, experiment with buggy software, and even test security. Now, for the first time, the creator and maintainer of User Mode Linux shows how to put it to work hands-on. Jeff Dike covers everything from getting started through running enterprise-class User Mode Linux servers. You'll find authoritative advice on bootup, compilation, administration, specialized configurations, and much more.
Coverage includes
  • What User Mode Linux is, how it works, and its uses in Linux networks
  • Key applications, including server consolidation, development, and disaster recovery
  • Booting and exploration: logins, consoles, swap space, partitioned disks, and more
  • Copy-On-Write (COW): UML's efficient approach to storing filesystem changes
  • In-depth discussion of User Mode Linux networking and security
  • Centrally managing User Mode Linux instances, and controlling their hardware resources
  • Implementing clusters and other specialized configurations
  • Setting up User Mode Linux servers, step-by-step: small-scale and large-scale examples
  • The future of virtualization and User Mode Linux
Whether you're a netadmin, sysadmin, teacher, student, or programmer, User Mode Linux®--the technology and this book--is indispensable.


Preface ix Acknowledgments xi About the Author xiiiChapter 1: Introduction 1 What Is UML? 1 Comparison with Other Virtualization Technologies 2 Why Virtual Machines? 3 A Bit of History 4 What Is UML Used For? 8 The Future 14 Chapter 2: A Quick Look at UML 17 Booting UML for the First Time 20 Booting UML Successfully 24 Looking at a UML from the Inside and Outside 29 Conclusion 37 Chapter 3: Exploring UML 39 Logging In as a Normal User 39 Consoles and Serial Lines 40 Adding Swap Space 47 Partitioned Disks 49 UML Disks as Raw Data 53 Networking 54 Shutting Down 59 Chapter 4: A Second UML Instance 61 COW Files 61 Networking the UML Instances 71 A Virtual Serial Line 79 Chapter 5: Playing with a UML Instance 83 Use and Abuse of UML Block Devices 83 Networking and the Host 87 Chapter 6: UML Filesystem Management 101 Mounting Host Directories within a UML 101 Host Access to UML Filesystems 114 Making Backups 116 Extending Filesystems 117 When to Use What 118 Chapter 7: UML Networking in Depth 121 Manually Setting Up Networking 121 The UML Networking Transports 142 An Extended Example 155 Chapter 8: Managing UML Instances from the Host 167 The Management Console 167 Controlling a UML Instance with Signals 188 Chapter 9: Host Setup for a Small UML Server 191 Host Kernel Version 192 UML Execution Modes 194 Managing Long-Lived UML Instances 203 Networking 206 UML Physical Memory 206 Host Memory Consumption 208 umid Directories 209 Overall Recommendations 209 Chapter 10: Large UML Server Management 211 Security 212 Jailing UML Instances 216 Providing Console Access Securely 223 skas3 versus skas0 225 Future Enhancements 226 Final Points 232 Chapter 11: Compiling UML from Source 233 Downloading UML Source 234 Configuration 235 Compilation 249 Chapter 12: Specialized UML Configurations 251 Large Numbers of Devices 252 Clusters 265 UML as a Decision-Making Tool for Hardware 273 Chapter 13: The Future of UML 275 The externfs Filesystem 277 Virtual Processes 282 Captive UML 283 Virtualized Subsystems 295 Conclusion 298 Appendix A: UML Command-Line Options 301 Device and Hardware Specifications 301 Debugging Options 303 Management Options 304 Informational Options 305 Appendix B: UML Utilities Reference 307 humfsify 307 uml_moo 308 uml_mconsole 308 tunctl 310 uml_switch 311 Internal Utilities 312 Index 313


Jeff Dike, an engineer at Intel, is author and maintainer of User Mode Linux. Well known throughout the Linux technical community, he has been active in Linux kernel development for more than five years. He holds a degree in Computer Science and Engineering from MIT.

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