ftp.postgresql.org/pub/repos/yum/9.6/redhat/rhel-6-x86_64 :
postgresql96-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-contrib-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-devel-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-docs-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-libs-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-plperl-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-plpython-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-pltcl-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-server-9.6.21-1PGDG.rhel6.x86_64.rpm
postgresql96-test-9.6.21-1PGDG.rhel6.x86_64.rpm
topn_96-2.3.1-1.rhel6.x86_64.rpm