High-quality ERD generator for PostgresQL under Linux?

DbSchema is a Visual Designer for Relational & NoSQL Databases. It can be evaluated 15 days for free. After that a paid License must be purchased.

It can be used to generate a ERD for Postgresql as well as other databases.

Downloading installer

Installers are available to download for various platforms (Linux, Windows and MacOS).

Installing and running DbSchema on Linux

To install run following commands in your shell:

wget https://dbschema.com/download/DbSchema_unix_8_2_5.tar.gz
tar xf DbSchema_unix_8_2_5.tar.gz
cd DbSchema
chmod +x DbSchema_unix_8_x_x.sh

To run DbSchema:

./DbSchema_unix_8_x_x.sh

Note: Dependent on the downloaded version (e.g. 8_2_5) the commands above may change (i.e. replace 8_x_x with downloaded 8_2_5).

You may try DbVisualizer. In my opinion, DbVisualizer in references graphs has met my needs in generating ERD from existing database.

This is a little bit dated question, but for completeness. What about PgModeler? According to their github repo it's under GPL3. Schema creation works well.