My DB is PostgreSQL.I am on CENTOS.... While installing the pg gem I received the following error. I reinstalled to clear my YAML problem also, which didn\'t work, but it is jus
$ sudo apt-get install libpq-dev $ sudo apt-get install libdbd-pg-ruby1.8
then:
$ sudo apt-get install pg
for CentOS please read the below link..
http://wiki.postgresql.org/wiki/YUM_Installation
To install pg in centOS
run this commands bundle config build.pg gem install pg -v '0.12.0'