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5.8.3 securityfs....................................................................................................................................174
5.9 Device drivers....................................................................................................................................174
5.9.1 I/O virtualization on System z....................................................................................................175
5.9.1.1 Interpretive-execution facility............................................................................................175
5.9.1.2 State description.................................................................................................................176
5.9.1.3 Hardware virtualization and simulation..............................................................................177
5.9.2 Character device driver..............................................................................................................178
5.9.3 Block device driver....................................................................................................................179
5.10 System initialization........................................................................................................................179
5.10.1 init............................................................................................................................................180
5.10.2 System x...................................................................................................................................181
5.10.2.1 Boot methods...................................................................................................................181
5.10.2.2 Boot loader.......................................................................................................................181
5.10.2.3 Boot process.....................................................................................................................182
5.10.3 System p...................................................................................................................................185
5.10.3.1 Boot methods...................................................................................................................185
5.10.3.2 Boot loader.......................................................................................................................185
5.10.3.3 Boot process.....................................................................................................................185
5.10.4 System p in LPAR....................................................................................................................187
5.10.4.1 Boot process.....................................................................................................................188
5.10.5 System z...................................................................................................................................191
5.10.5.1 Boot methods...................................................................................................................191
5.10.5.2 Control program...............................................................................................................191
5.10.5.3 Boot process.....................................................................................................................191
5.10.6 eServer 326..............................................................................................................................193
5.10.6.1 Boot methods...................................................................................................................194
5.10.6.2 Boot loader.......................................................................................................................194
5.10.6.3 Boot process.....................................................................................................................194
5.11 Identification and authentication......................................................................................................197
5.11.1 Pluggable Authentication Module............................................................................................197
5.11.1.1 Overview..........................................................................................................................197
5.11.1.2 Configuration terminology...............................................................................................198
5.11.1.3 Modules............................................................................................................................199
5.11.2 Protected databases..................................................................................................................200
5.11.2.1 Access control rules........................................................................................................202
5.11.3 Trusted commands and trusted processes.................................................................................202
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