[Proj] installing proj

[Jeremy B]

Okay this is a very basic question I imagine.
 
I want to install Proj on my Linux machine.
 
I unzipped/untarred the tarball to /usr/local/src/proj-4.6.0.
I then ran 
 
    configure
    make
    make install
 
as it says in the docs (then updated PATH appropriately) but when i run proj
from the command line I get the following:
 
$ proj
proj: error while loading shared libraries: libproj.so.0: cannot open shared
object file: No such file or directory
 
I must be doing something obviously wrong but i dont' know what it is.  Can
anybody help me?
 
Thanks
 
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