# mkdir /pgbak
# chown postgres:postgres /pgbak/
# su - postgres
$ pg_dumpall --globals-only > /pgbak/globals.sql
$ psql -l
$ pg_dump --create --oids --format=c --verbose --file=/pgbak/dbX dbX
$ exit
# /etc/init.d/postgresql stop
# mv /var/lib/pgsql/data /pgbak
# yum remove postgresql*
# yum install postgresql84-server
service postgresql initdb
# chkconfig postgresql on
# service postgresql start
# su - postgres
$ psql -f /pgbak/globals.sql
$ pg_restore --create -d postgres /pgbak/dbX
$ exit
#service postgresql restart
# yum install httpd mod_ssl
# mv /etc/httpd/conf/httpd.conf /tmp/.
# mv /etc/httpd/conf/httpd.conf.rpmsave /etc/httpd/conf/httpd.conf
# mv /etc/httpd/conf.d/proxy_ajp.conf /tmp/.
# mv /etc/httpd/conf.d/proxy_ajp.conf.rpmsave /etc/httpd/conf.d/proxy_ajp.conf
# mv /etc/httpd/conf.d/ssl.conf /tmp/.
# mv /etc/httpd/conf.d/ssl.conf.rpmsave /etc/httpd/conf.d/ssl.conf