When to Boot a System

Turning off system power due to anticipated power outage 

Turn system power back on 

Chapter 7, Shutting Down a System (Tasks)

Chapter 7, Shutting Down a System (Tasks)

Changing kernel parameters in the /etc/system file

Reboot the system to run level 3 (multiuser mode with NFS resources shared) 

"SPARC: How to Boot a System to Run Level 3 (Multiuser State)"

"x86: How to Boot a System to Run Level 3 (Multiuser State)"

Performing file system maintenance, such as performing a backup or restoring system data 

Use Control-d from run level S to bring the system back to run level 3 

"SPARC: How to Boot a System to Run Level S (Single-User State)"

"x86: How to Boot a System to Run Level S (Single-User State)"

Repairing a system configuration file such as /etc/system

Interactive boot 

"SPARC: How to Boot a System Interactively"

"x86: How to Boot a System Interactively"

Changing pseudo device parameters in the /etc/system file

Reconfiguration boot 

"Tuning Kernel Parameters (Tasks)" in System Administration Guide, Volume II

"Tuning Kernel Parameters (Tasks)" in System Administration Guide, Volume II

Adding or removing hardware from the system 

Reconfiguration boot (plus turning on system power after adding or removing hardware) 

"SPARC: How to Connect a Secondary Disk and Boot"

Chapter 24, x86: Adding a Disk (Tasks)

Booting the kernel debugger (kadb) to track down a system problem

Booting kabd

"SPARC: How to Boot the System Using the Kernel Debugger (kadb)"

"x86: How to Force a Crash Dump and Reboot the System"

Repairing an important system file which is causing system boot failure 

Recovery boot 

"x86: How to Boot a System for Recovery Purposes"

"x86: How to Boot a System for Recovery Purposes"

Recovering from a hung system and you want to force a crash dump 

Recovery boot 

See example on "x86: How to Force a Crash Dump and Reboot the System"

See example on "x86: How to Force a Crash Dump and Reboot the System"