Installation guide

Environment Variables. . . ........................... 3–22
Examples ........................................ 3–23
Reference ........................................ 3–23
test ................................................ 3–24
Synopsis ......................................... 3–24
Description ....................................... 3–24
Examples ........................................ 3–24
References .......................................... 3–25
4 Setting Environment Variables
Chapter Description ................................... 4–1
What Is an Environment Variable? . ................... 4–1
In This Chapter ................................... 4–1
Overview: Do I Need to Set Environment Variables?.......... 4–2
Deciding to Set Environment Variables ................. 4–2
What Variables Can I Set? ........................... 4–2
Displaying Current Environment Variables .............. 4–2
Before You Begin . . ................................... 4–4
Preliminary Actions ................................ 4–4
Changing the Default Startup Action (auto_action) . .......... 4–4
Default Startup Actions . . ........................... 4–4
Your System’s Current Startup Action .................. 4–5
Choosing ‘‘Halt’’ ................................... 4–5
Choosing ‘‘Boot’’ ................................... 4–5
Choosing ‘‘Restart’’ ................................. 4–5
Set the Default Startup Action ....................... 4–6
Undo the Setting .................................. 4–6
Setting or Changing the Default Boot Device (bootdef_dev) . . . . . 4–7
Default Boot Device ................................ 4–7
Why Set the Default Boot Device? . . ................... 4–7
Your System’s Current Default Boot Device .............. 4–7
Which One Is the Boot Device? ....................... 4–7
Preliminary Considerations .......................... 4–8
Set or Change the Default Boot Device ................. 4–9
Undo the Setting .................................. 4–9
Setting Boot Flags (boot_osflags) ......................... 4–10
What Are Boot Flags? . . . ........................... 4–10
Boot Flags Settings for OpenVMS AXP Systems .......... 4–10
Boot Flags Settings for DEC OSF/1 AXP Systems ......... 4–12
Your System’s Current Default Boot Flags ............... 4–12
When to Set Boot Flags . . ........................... 4–12
Set Boot Flags . ................................... 4–13
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