Bash: Using Dot Or "source" Calling Another Script - What Is Difference?
Answer :
The only difference is in portability. . is the POSIX-standard command for executing commands from a file; source is a more-readable synonym provided by bash and some other shells. bash itself, however, makes no distinction between the two.
There is no difference.
From the manual:
sourcesource filename A synonym for . (see Bourne Shell Builtins).
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