5.11.3.1 agetty................................................................................................................................203
5.11.3.2 gpasswd............................................................................................................................203
5.11.3.3 login.................................................................................................................................203
5.11.3.4 mingetty...........................................................................................................................204
5.11.3.5 newgrp..............................................................................................................................205
5.11.3.6 passwd..............................................................................................................................206
5.11.3.7 su......................................................................................................................................206
5.11.4 Interaction with audit...............................................................................................................207
5.12 Network applications........................................................................................................................207
5.12.1 OpenSSL Secure socket-layer interface............................................ ......................... ..............207
5.12.1.1 Concepts...........................................................................................................................209
5.12.1.2 SSL architecture...............................................................................................................213
5.12.1.3 OpenSSL algorithms........................................................................................................217
5.12.1.4 Symmetric ciphers............................................................................................................217
5.12.2 Secure Shell .............................................................................................................................218
5.12.2.1 SSH client........................................................................................................................220
5.12.2.2 SSH server daemon.........................................................................................................220
5.12.3 Very Secure File Transfer Protocol daemon.............................................................................220
5.12.4 CUPS.......................................................................................................................................221
5.12.4.1 cupsd................................................................................................................................222
5.12.4.2 ping..................................................................................................................................224
5.12.4.3 ping6................................................................................................................................224
5.12.4.4 openssl..............................................................................................................................224
5.12.4.5 stunnel..............................................................................................................................224
5.12.4.6 xinetd...............................................................................................................................225
5.13 System management.........................................................................................................................226
5.13.1 Account Management..............................................................................................................226
5.13.1.1 chage................................................................................................................................226
5.13.1.2 chfn..................................................................................................................................226
5.13.1.3 chsh..................................................................................................................................227
5.13.2 User management.....................................................................................................................228
5.13.2.1 useradd.............................................................................................................................228
5.13.2.2 usermod............................................................................................................................228
5.13.2.3 userdel..............................................................................................................................229
5.13.3 Group management..................................................................................................................231
5.13.3.1 groupadd..........................................................................................................................231
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