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Debugging Hooks Functions that enable shell tracing in critical code sections.

Execution Tracing See shell tracing.

Invocation Activated Methods for enabling debugging modes that take effect when a script is invoked.

Programmer Activated Debugging modes activated only when the shell script programmer uses the set command.

Shell Tracing Each command is printed in the exact form that it is executed.

Syntax Checking The process of verifying a script's syntax without executing it.

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