process

Glossary

An invocation of a program. Generally , process refers to a program running

in memory, while program is the code stored on disk.

process ID

A unique identi￿cation number assigned to all processes b y the operating system. Also see PID.

pty

Pseudo-terminal.

RAM

random-access memory .

regular expression

A string of characters that selects text.

relative path name

The name of a ￿le, listing all the directories leading to that ￿le in relation to the current working directory.

ROM

read-only memory .

root directory

The highest level directory of the hierarc hical ￿le system, from whic h all other ￿les branc h. In HP-UX, the slash ( /) character refers to the \root directory." The root directory is the only directory in the ￿le system that is its own \parent directory."

root ￿le system

The ￿le system moun ted on the cluster serv er.

root server

The node in a cluster to whic h the storage device con taining the root ￿le system of the cluster is ph ysically attached. Also cluster server.

root user

The user with root permission, ha ving a separate \root" accoun t and password.

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