ln(1) -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
make links between files
-s, --symbolic
       make symbolic links instead of hard links
-f, --force
       remove existing destination files
-v, --verbose
       print name of each linked file
In  the  1st  form,  create  a link to TARGET with the name LINK_NAME.  In the 2nd form, create a link to
TARGET in the current directory.  In the 3rd and 4th forms, create links to  each  TARGET  in  DIRECTORY.
Create hard links by default, symbolic links with --symbolic.  When creating hard links, each TARGET must
exist.  Symbolic links can hold arbitrary text; if later resolved, a  relative  link  is  interpreted  in
relation to its parent directory.
source manpages: ln