Echo On/Off

Normally, everything you type on the keyboard is shown on the screen. In other w ords, the screen echoes your typing. However, in some situations, y ou may not want to see your typing appear. For example, when y ou are typing a passw ord, someone looking o ver your shoulder may see it or observ e it on the screen if y ou leave the terminal. It pro vides better securit y if the password does not appear on the screen. Y ou can turn o￿ the echo feature, so y our typing does not appear, b y entering

:SET ECHO=OFF

You can turn on the echo feature, so y ou can see what y ou type, by entering

:SET ECHO=ON

Accounting Structure Ov erview

For programming on the 900 Series HP 3000, it is important that y ou understand the accounting structure. Its major componen ts are:

Accounts

Users

Groups

Files

The accounting structure on the HP 3000 family of computers is designed for business and industrial purposes. The abilit y to account for system use on a departmen t level is a fundamental element in business accounting. HP 3000 systems record on an accoun t basis the amount of CPU time, elapsed time (connect time), and disc space used. An HP 3000 computer must have a system accoun t named SYS. This is used to store the information necessary to running the operating system. Y ou can add more accoun ts for other purposes.

A user name identi￿es a valid user for an accoun t. A group is a partition in an accoun t for storing ￿les that are logically related.

Logon and Logoff

If you are not familiar with the HP 3000 accoun ting structure, y ou can still log on and o￿ the system for simple use while y ou are learning about the accoun ting structure. Simple instructions for logging on the system are pro vided in To log o￿ the system, simply en ter the MPE/iX command :BYE.

Account

An account on the 900 Series HP 3000 pro vides a billable entity for accoun ting purposes. Accounts can be added to or remo ved from a system, as needed. A system alwa ys has a SYS account, containing operating system softw are, subsystem softw are, and system data. A SUPPORT account contains troubleshooting information useful for pro viding information for proper system support. The SYS and SUPPORT accounts are part of the system when it is delivered. On an account basis, the system can limit:

OVERVIEW 1-23