Fedora Draft Documentation System Administrator's Reference Guide A Reference Guide for Administrators of Fedora Jaromír Hradílek Douglas Silas Martin Prpič Stephen Wadeley System Administrator's Reference Guide Draft Fedora Draft Documentation System Administrator's Reference Guide A Reference Guide for Administrators of Fedora Edition 20.0.1 Author Jaromír Hradílek [email protected] Author Douglas Silas [email protected] Author Martin Prpič [email protected] Author Stephen Wadeley [email protected] Copyright © 2014 Red Hat, Inc. and others. The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/. The original authors of this document, and Red Hat, designate the Fedora Project as the "Attribution Party" for purposes of CC-BY-SA. In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, MetaMatrix, Fedora, the Infinity Logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. For guidelines on the permitted uses of the Fedora trademarks, refer to https://fedoraproject.org/wiki/ Legal:Trademark_guidelines. Linux® is the registered trademark of Linus Torvalds in the United States and other countries. Java® is a registered trademark of Oracle and/or its affiliates. XFS® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL® is a registered trademark of MySQL AB in the United States, the European Union and other countries. All other trademarks are the property of their respective owners. The System Administrator's Reference Guide provides reference material for Fedora 20, and is oriented towards system administrators with a basic understanding of the system. For information regarding the deployment, configuration, and administration of this system, refer to the Fedora System Administrator's Guide. Draft Draft Preface v 1. Document Conventions ................................................................................................... v 1.1. Typographic Conventions ...................................................................................... v 1.2. Pull-quote Conventions ........................................................................................ vi 1.3. Notes and Warnings ............................................................................................ vii 2. We Need Feedback! ...................................................................................................... vii 1. Network Interfaces 1 1.1. Network Configuration Files .......................................................................................... 1 1.2. Interface Configuration Files ......................................................................................... 2 1.2.1. Ethernet Interfaces ............................................................................................ 2 1.2.2. Specific ifcfg Options for Linux on System z ........................................................ 7 1.2.3. Required ifcfg Options for Linux on System z ...................................................... 7 1.2.4. Alias and Clone Files ......................................................................................... 8 1.2.5. Dialup Interfaces ............................................................................................... 9 1.2.6. Other Interfaces ............................................................................................... 10 1.3. Interface Control Scripts ............................................................................................. 11 1.4. Network Function Files ............................................................................................... 13 1.5. Ethtool ....................................................................................................................... 13 1.6. Additional Resources .................................................................................................. 19 1.6.1. Installed Documentation ................................................................................... 19 1.6.2. Useful Websites ............................................................................................... 19 2. The proc File System 21 2.1. A Virtual File System .................................................................................................. 21 2.1.1. Viewing Virtual Files ........................................................................................ 21 2.1.2. Changing Virtual Files ...................................................................................... 22 2.2. Top-level Files Within the proc File System .................................................................. 22 2.2.1. /proc/buddyinfo ................................................................................................ 23 2.2.2. /proc/cmdline ................................................................................................... 23 2.2.3. /proc/cpuinfo .................................................................................................... 23 2.2.4. /proc/crypto ...................................................................................................... 24 2.2.5. /proc/devices .................................................................................................... 24 2.2.6. /proc/dma ........................................................................................................ 25 2.2.7. /proc/execdomains ........................................................................................... 25 2.2.8. /proc/fb ............................................................................................................ 26 2.2.9. /proc/filesystems .............................................................................................. 26 2.2.10. /proc/interrupts ............................................................................................... 26 2.2.11. /proc/iomem ................................................................................................... 27 2.2.12. /proc/ioports ................................................................................................... 28 2.2.13. /proc/kcore ..................................................................................................... 28 2.2.14. /proc/kmsg ..................................................................................................... 28 2.2.15. /proc/loadavg ................................................................................................. 28 2.2.16. /proc/locks ..................................................................................................... 29 2.2.17. /proc/mdstat ................................................................................................... 29 2.2.18. /proc/meminfo ................................................................................................ 30 2.2.19. /proc/misc ...................................................................................................... 31 2.2.20. /proc/modules ................................................................................................ 31 2.2.21. /proc/mounts .................................................................................................. 32 2.2.22. /proc/mtrr ....................................................................................................... 33 2.2.23. /proc/partitions ............................................................................................... 33 2.2.24. /proc/slabinfo .................................................................................................. 33 2.2.25. /proc/stat ........................................................................................................ 34 2.2.26. /proc/swaps .................................................................................................... 35 2.2.27. /proc/sysrq-trigger ........................................................................................... 35 iii System Administrator's Reference Guide Draft 2.2.28. /proc/uptime ................................................................................................... 36 2.2.29. /proc/version .................................................................................................. 36 2.3. Directories within /proc ................................................................................................ 36 2.3.1. Process Directories .......................................................................................... 36 2.3.2. /proc/bus/ ........................................................................................................ 38 2.3.3. /proc/bus/pci .................................................................................................... 39 2.3.4. /proc/driver/ ...................................................................................................... 39 2.3.5. /proc/fs ...........................................................................................................