Tools & Databases

Practical notes on the tools that come up every day — Git, PostgreSQL and Docker.

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Tools & Databases

Practical notes on the tools that come up every day: per-folder Git configs, PostgreSQL roles and privileges, and reclaiming disk space from Docker.

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PostgreSQL User and Privilege Management

Essential PostgreSQL commands: list databases and tables, create roles, change owners and grant least-privilege access – including default privileges and the PostgreSQL 15 public schema change.

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Different Git Configs per Folder

Use includeIf in your .gitconfig to switch email, name and signing key automatically – per folder or per remote URL. Works for GPG and SSH signing.

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Clean Up Docker: Free Disk Space Safely

Docker eating your disk? See what uses space with docker system df, then clean up containers, images, volumes and build cache with the prune commands – safely.

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