osx - Difference between symlink and alias -

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i trying set opening sublime text editor terminal on mac os.

when searching found out 1 way that: create soft link (symlink) , change path in .profile ln -s /applications/sublime\ text\ 2.app/contents/sharedsupport/bin/subl /usr/local/bin/sublime since path did not change in .profile added alias sublime=' open /applications/sublime\ text\ 2.app/contents/sharedsupport/bin/subl'

could please tell me difference between these ways?which way better?how change path terminal not opening .profile?


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