PostgreSQL - pg_config -bash: pg_config: command not found

you can install postgresql-devel to get that. in rpm based distro

yum install postgresql-devel

will work

or use

yum provides "*/pg_config"

to get the exact package

bash unix postgresql shell path

In addition to installing postgresql-devel I had to modify the PATH environment variable. E.g. add this to your .bashrc:

export PATH="$PATH:/usr/pgsql-9.4/bin"

bash unix postgresql shell path

My problem was that pg_config was not in the PATH. So, I first needed to search for pg_config's path by using

yum provides "*/pg_config"

After noting the path, I used this command to install pg gem

gem install pg -- --with-pg-config=/usr/pgsql-9.4/bin/pg_config

That installed pg successfully. The system was a CentOS.

CodeHunter