Boot and shutdown of AIX system

System Boot Mode

By default, the system will boot with a list of boot devices in normal mode. When the machine starts properly, the system completes the entire AIX boot process, including activating the terminal and displaying the login prompt on each terminal for multiuser access. You can also activate the hard drive, load the file system, start the network, and so on.

Another startup mode is SMS (System Management Service). He can be used to view the system configuration, set the device launch list, and so on. During the post phase of the system boot, SMS is entered via F1.

If the system is unable to enter or forget the root password, you need to boot through the AIX boot CD or system backup. This allows the system to boot into system maintenance mode.

There is also a startup mode for diagnostic mode.

Start the System Administration Services menu (SMS)

If you do not enter the AIX system, you can use the SMS menu to set up and view the system startup list.

SMS consists primarily of four features:

Config to view hardware configuration information

Boot view or change the startup list

Utilities set the power-on password and admin password, view important product data, view error log, select Activity console, System microcode upgrade.

Exit returns to the front menu

Bootinfo command

View System schema type: bootinfo-p

View system addressing Type: bootinfo-y

System Schema Type:

Aix V5.1 supports rs6k, RSPC, and CHRP and Aix V5.2 only supports CHRP.

Schema Processor type description

Rs6kpower Classic Type rs/6000, based on MCA bus

Rspcpowerpower reference platform, based on PCI bus

Chrppower General Hardware Reference platform, based on PCI bus

Alog command

The BOS provides a log management program Alog command that applications and users can use to manage logs. The default log type supported by the system is Boot,bosinst,nim,console

Many important information is logged during the boot process, and you can use the command Alog-o-t boot to view startup information. If the system does not boot, you can boot into maintenance mode from the CD and further view the contents of the system boot log.

/etc/inittab file

File format: Id:runlevel:action:command

This file controls the system startup process and provides the init command with a list of programs to run when the system is initialized.

System resource Controller (SRC)

interface to provide a unified control subsystem

Control of subsystems or subsystem groups

The task of managing the control subsystem with a set of commands is greatly simplified. A subsystem is a collection of programs or a set of related programs that perform related functions. Subsystems can be divided into child services and child services like processes.

System Resource Controller Command format

Show src Status: # lssrc-g Spooler

Boot subsystem: # startsrc-s LPD

Refresh Subsystem: # Refresh-s LPD

Stop SUBSYSTEM: # stopsrc-s LPD

Stop process

# PS-EF

For processes that are not started by srcmstr

# Kill PID

For processes that are initiated by SRC

# stopsrc-s Qdaemon

Shutting down the system

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