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Pre-requisites

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Debian

apt-get install build-essential libreadline-dev zlib1g-dev flex bison

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RHEL

yum install gcc glibc glib-common readline readline-devel zlib zlib-devel flex bison

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Install pg-gsheets

Clone or download the source code zip. Run the following command in the source code directory to build and install the extension. 
make install
Check if the pg_config utility is in your PATH by running pg_config. If it’s not found, provide the path: 
make PG_CONFIG=/path/to/postgres/bin/pg_config install