Running Commands in a Sub-shell

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Here is how to run "/bin/script.sh" inside "/workingdir" without changing your current path.
(cd /workingdir; /bin/script.sh)

Here is how to run sequence of commands with checking status after each command by inserting "&&"
(cd /workingdir && /bin/script.sh)

Memory is better managed by using "exec" command.
(cd /workingdir && exec /bin/script.sh)