/usr/bin/clusterdb
/usr/bin/createdb
/usr/bin/createlang
/usr/bin/createuser
/usr/bin/dropdb
/usr/bin/droplang
/usr/bin/dropuser
/usr/bin/pg_dumpall
/usr/bin/pg_dump
/usr/bin/pg_restore
/usr/bin/psql
/usr/bin/reindexdb
/usr/bin/vacuumdb
You may install this package on CentOS with
yum
install postgresql