November 4, 2025
Use pg_stat_activity to find active PostgreSQL queries, long transactions, lock waits, and sessions that need cancellation.
Master PostgreSQL data protection with this comprehensive guide to `pg_dump` and `pg_restore`. Learn how to create reliable database backups using various formats, including plain-text, custom, and directory. Discover essential options for efficient dumping and explore step-by-step instructions for restoring your data. This tutorial covers best practices for scheduling, testing, and securely managing your PostgreSQL backups to ensure data integrity and recovery capabilities.
Learn essential SSH commands for remote login, keys, config files, file transfer, tunneling, agents, and troubleshooting.
Use SSH tunneling to reach private databases, web apps, and remote services with local, remote, and dynamic forwarding.
Transfer files securely with SCP and SFTP over SSH, including practical commands, key authentication, and safer server-side access controls.
Learn practical SSH commands for login, keys, file transfer, port forwarding, and reusable host configuration.
Use Ansible ad-hoc service commands to start, stop, restart, reload, enable, and disable Linux services safely.
Verify Ansible connectivity with ping checks, inventory validation, SSH or WinRM tests, and useful verbose output.
Use Ansible copy and fetch ad-hoc commands to push files to managed nodes and retrieve logs or configs back to your control node.
Master Ansible inventory management with this comprehensive guide. Learn to define, group, and verify hosts using both static INI/YAML files and dynamic inventory sources. Explore practical examples and essential `ansible-inventory` command flags like `--graph`, `--host`, and `--list` to ensure your automation targets the right systems effectively.
Use Ansible ad-hoc commands for quick checks, one-off fixes, file changes, and fact gathering without writing a playbook.
Learn Docker volume commands for creating, listing, inspecting, mounting, backing up, removing, and pruning persistent data.