How to install apoc for neo4j?

I'm using Red Hat Linux specifically Oracle-7 and here is how I got it working

1. Download the apoc-<version>.jar into the /var/lib/neo4j/plugins directory
2. chown neo4j:neo4j apoc-<version>.jar
3. chmod 755 apoc-<version>.jar
4. Open the neo4j.conf at /etc/neo4j/neo4j.conf and replace the line #dbms.security.procedures.whitelist=apoc.coll.*,apoc.load.* with dbms.security.procedures.whitelist=apoc.coll.*,apoc.load.*,apoc.* and save it.
5. Restart the Neo4j service by issuing the command systemctl restart neo4j

Note: Make sure that you have the right version of apoc jar downloaded. I'm using the neo4j version 3.5.5 and the apoc jar version I'm using is apoc-3.5.0.3-all.jar. Alos make sure that you have the dbms.directories.plugins=/var/lib/neo4j/plugins uncommented in the /etc/neo4j/neo4j.conf

If you installed neo4j using a Windows or Mac installer (which most people do), and not from a zip or tar file, then the plugins folder should be in your database folder, not in your neo4j installation folder.

Here is a related answer with a little more detail: https://stackoverflow.com/a/42357481/974731.