ftp.postgresql.org/pub/repos/yum/11/redhat/rhel-6-x86_64 :
postgresql11-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-contrib-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-devel-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-docs-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-libs-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-plperl-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-plpython-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-pltcl-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-server-11.11-2PGDG.rhel6.x86_64.rpm
postgresql11-test-11.11-2PGDG.rhel6.x86_64.rpm
topn_11-2.3.1-1.rhel6.x86_64.rpm