Hi  Please help me  I am working on a CentOS release 6 server, I am struggling with the environment setup. Please help.   data]# createdb -U postgres db0201 createdb: symbol lookup error: createdb: undefined symbol: PQconnectdbParams   data]# psql -U postgres -l psql: symbol lookup error: psql: undefined symbol: PQconnectdbParams    When I try to locate version 8.4 I donâ??t get the rpms so I can remove them. The server had some 8.4 installations   lib]# rpm -qa | grep postgresql postgresql92-contrib-9.2.4-1PGDG.rhel6.x86_64 postgresql84-8.4.17-1PGDG.rhel6.x86_64 postgresql92-libs-9.2.4-1PGDG.rhel6.x86_64 postgresql84-server-8.4.17-1PGDG.rhel6.x86_64 postgresql92-server-9.2.4-1PGDG.rhel6.x86_64 postgresql84-libs-8.4.17-1PGDG.rhel6.x86_64 postgresql92-9.2.4-1PGDG.rhel6.x86_64 lib]#   [root@f020100 data]# rpm -e 'rpm -qa | grep post | grep 8.4' error: package rpm -qa | grep post | grep 8.4 is not installed Â
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