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Question
In linux, what does the built-in command source do?
Answer

It executes a shell script IN THE CURRENT SHELL, therefore preseving the variables/environment variables set by that script in the current/originating shell.

e.g. if you do "source test.sh" and test.sh sets variable X=2, then in the originating/current shell, X is now set, even after test.sh finishes running.


Question
In linux, what does the built-in command source do?
Answer
?

Question
In linux, what does the built-in command source do?
Answer

It executes a shell script IN THE CURRENT SHELL, therefore preseving the variables/environment variables set by that script in the current/originating shell.

e.g. if you do "source test.sh" and test.sh sets variable X=2, then in the originating/current shell, X is now set, even after test.sh finishes running.

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20. Advanced Shell Scripting
rking directory. set Prints the value of all environment variables. See also Section 20.6 on the set command. source filename args ... Reads filename into the current current shell environment. <span>This is useful for executing a shell script when environment variables set by that script must be preserved. times Prints the accumulated user and system times for the shell and for processes run from the shell. type command Tells whether command is an alias, a built-in or a system executable.

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