A file contains reusable command sequences you want accessible in your open shell session without invoking another shell process. Which built-in command loads its contents into your present environment?
./loader.sh
source library.sh
exec helper.sh
sh functions.sh
The built-in command reads the given file and executes its lines within the current shell, making its functions and variables available immediately. Using sh or ./ launches a child process, isolating any definitions; exec replaces the current shell, preventing return to the original session.
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