Introduction of Ubuntu Server Construction- Ubuntu
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Installing postgresql-client-PostgreSQL database client
Install "postgresql-client" with the apt command so that you can use the PostgreSQL database client application "psql".
sudo apt install -y postgresql-client
Confirm that the pg command has been installed
Make sure you have the PostgreSQL pg command installed.
psql --version
It is installed when the version information is displayed as shown below.
psql (PostgreSQL) 10.12 (Ubuntu 10.12-0ubuntu0.18.04.1)