What is the significance of the $$ variable in a shell script?
- It represents the parent process ID.
- It represents the user's home directory.
- It represents the current working directory.
- It represents the process ID of the current script.
The correct answer is d) It represents the process ID of the current script. The $$ variable is used to access the unique process identifier assigned to the running script. It's valuable for tasks like creating temporary files or ensuring script uniqueness.
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