5.5. Making the Storage Usable.............................................................................................. 67

5.5.1. Partitions/Slices................................................................................................. 67

5.5.2. File Systems ...................................................................................................... 69

5.5.3. Directory Structure............................................................................................ 71

5.5.4. Enabling Storage Access................................................................................... 71

5.6. Advanced Storage Technologies ...................................................................................... 72

5.6.1. Network Accessible Storage............................................................................. 72

5.6.2. RAID Based Storage ........................................................................................ 73

5.7. Storage Management Day to Day ................................................................................... 78

5.7.1. Monitoring Free Space...................................................................................... 78

5.7.2. Disk Quota Issues ............................................................................................. 80

5.7.3. File Related Issues ............................................................................................ 81

5.7.4. Adding/Removing Storage................................................................................ 82

5.8. A Word About Backups. . . .............................................................................................. 88

5.9. Red Hat Linux Specific Information ............................................................................... 88

5.9.1. Device Naming Conventions ............................................................................ 88

5.9.2. File System Basics ............................................................................................ 89

5.9.3. Mounting File Systems ..................................................................................... 91

5.9.4. Network Accessible Storage Under Red Hat Linux ......................................... 94

5.9.5. Mounting File Systems Automatically with

/etc/fstab

............................... 95

5.9.6. Monitoring Disk Space ..................................................................................... 95

5.9.7. Adding/Removing Storage................................................................................ 97

5.9.8. Implementing Disk Quotas ............................................................................. 101

5.9.9. Creating RAID Arrays .................................................................................... 105

5.9.10. Day to Day Management of RAID Arrays ................................................... 106

5.10. Additional Resources ................................................................................................... 107

5.10.1. Installed Documentation ............................................................................... 107

5.10.2. Useful Websites ............................................................................................ 108

5.10.3. Related Books ............................................................................................... 108

6. Managing User Accounts and Resource Access ....................................................................... 109

6.1. Managing User Accounts............................................................................................... 109

6.1.1. The Username ................................................................................................. 109

6.1.2. Passwords........................................................................................................ 112

6.1.3. Access Control Information............................................................................ 116

6.1.4. Managing Accounts and Resource Access Day to Day ................................. 117

6.2. Managing User Resources ............................................................................................. 119

6.2.1. Who Can Access Shared Data ........................................................................ 119

6.2.2. Where Users Access Shared Data................................................................... 120

6.2.3. What Barriers Are in Place To Prevent Abuse of Resources .......................... 121

6.3. Red Hat Linux Specific Information ............................................................................. 121

6.3.1. User Accounts, Groups, and Permissions ....................................................... 121

6.3.2. Files Controlling User Accounts and Groups ................................................. 123

6.3.3. User Account and Group Applications ........................................................... 126

6.4. Additional Resources ..................................................................................................... 127

6.4.1. Installed Documentation ................................................................................. 128

6.4.2. Useful Websites .............................................................................................. 128

6.4.3. Related Books ................................................................................................. 128