Linux17: Configuring the Scan Environment

Security tools are often configured through environment variables instead of config files — and PATH decides which tools you can even invoke by name

Objective

Learner can set and inspect shell/environment variables, understand PATH, and use them to configure a tool behavior

Mission

A vulnerability scanner utility was dropped into ~/cases/case-1042/tools/, but it can't be invoked by name from anywhere without a full path. Set an environment variable SCAN_TARGET=app-srv-03 and prove a companion script can read it

Commands you may need to solve this lab

echoexport

Questions

1. What role does PATH play when you type a command name?

2. What is the difference between a plain shell variable and an exported environment variable?

3. Why does command not found happen even when an executable file exists in the current directory?

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