User`s guide

4-36 AlphaServer DS20 User’s Guide
4.12 Using Environment Variables
Environment variables pass configuration information between the console and
the operating system. Their settings determine how the system powers up, boots
the operating system, and operates. You issue an init command to activate a new
environment variable.
Example 4–22 Set envar and Show envar Commands
P00>>> show console
console graphics
P00>>> set console serial
P00>>> show console
console serial
P00>>> init
Environment variables are set or changed with the set envar command and set to
default values with the set -default envar command. Their values are viewed with the
show envar command. User-defined nonvolatile environment variables are created
with the edit command described in Section 4.4. Section 4.18 describes the
environment variables in detail.