Intermediate System Administration for the Solaris 10 Operating Student Guide phần 6

Mức độ chạy là một hệ thống nhà nước, đại diện bởi chữ số hoặc một lá thư, xác định các dịch vụ và tài nguyên hiện đang có sẵn cho người dùng. Bảng 9-1 cho thấy mức độ chạy tám tìm thấy trong hệ điều hành Solaris. Bảng 9-1 cấp độ hệ điều hành Solaris Run Run Cấp 0 hoặc S 1 2 | The Service Management Facility SMF Identifying Legacy Run Level Fundamentals A run level is a system state represented by a digit or letter that defines the services and resources that are currently available to users. Table 9-1 shows the eight run levels found in the Solaris OS. Table 9-1 Solaris OS Run Levels Run Level Milestone Function 0 System is running the PROM monitor. s or S single-user Solaris OS single-user mode with critical file systems mounted and accessible. 1 The system is running in a single-user administrative state with access to all available file systems. 2 multi-user The system is supporting multiuser operations. Multiple users can access the system. All system daemons are running except for the Network File System NFS server and some other network resource server related daemons. 3 multi-user-server The system is supporting multiuser operations and has NFS resource sharing and other network resource servers available. 4 This level is currently not implemented. 5 A transitional run level in which the Solaris OS is shut down and the system is powered off. 6 A transitional run level in which the Solaris OS is shut down and the system reboots to the default run level. 9-12 Intermediate System Administration forthe Solaris 10 Operating System Copyright 2005 Sun Microsystems Inc. All Rights Reserved. Sun Services Revision The Service Management Facility SMF Determining a System s Current Run Level To determine the current run level of a system use the who -r command. Figure 9-4 shows output from the command. who -r . run level 3 Jun 9 08 30 3 0 s II I__I Current run level 2 Date and time of the last run level change_ Current run level Date and time of the last run level change__ Current run level Number of times at this run level since the last reboot Previous run level Figure 9-4 The System s Current Run Level Changing Run Levels Run levels are sometimes referred to as init states because the init .