https://adamfallon.com/Notes on technology, software engineering, and things I learn along the way.en-GBhttps://adamfallon.com/monitoring.htmlhttps://adamfallon.com/monitoring.htmlFri, 18 Sep 2026 00:00:00 +0100Things that might be important in the future.https://adamfallon.com/send_email_simply.htmlhttps://adamfallon.com/send_email_simply.htmlMon, 10 Mar 2025 00:00:00 +0000Docker send email guide using bytemark/smtp and Gmail SMTP. Set up automated email notifications with a simple bash script for cron jobs and backup alerts.https://adamfallon.com/llm_translator.htmlhttps://adamfallon.com/llm_translator.htmlTue, 19 Nov 2024 00:00:00 +0000How we built a real-time LLM translation service at Trainline using Claude 3.5 and AWS Bedrock to translate travel disruption messages across languages.https://adamfallon.com/elasticsearch_data_breach.htmlhttps://adamfallon.com/elasticsearch_data_breach.htmlThu, 22 Dec 2022 00:00:00 +0000How to use Elasticsearch and Kibana to search through the Facebook data breach. Step-by-step guide to indexing millions of records with Docker.https://adamfallon.com/ios_network_logging.htmlhttps://adamfallon.com/ios_network_logging.htmlSun, 04 Sep 2022 00:00:00 +0100Learn how to build an iOS network logging tool that captures HTTP requests on-device, eliminating the need for proxy setup during mobile release testing.https://adamfallon.com/yikyak_postgres.htmlhttps://adamfallon.com/yikyak_postgres.htmlMon, 08 Aug 2022 00:00:00 +0100Learn how to build location-based features using Postgres geospatial extensions. Use earthdistance and cube to find nearby posts like YikYak did.https://adamfallon.com/til-stop-all-containers-docker.htmlhttps://adamfallon.com/til-stop-all-containers-docker.htmlTo stop every running container in Docker, pass the output of docker ps -q to docker stop.https://adamfallon.com/til-emacs-spellcheck.htmlhttps://adamfallon.com/til-emacs-spellcheck.htmlYou can install a spellchecking tool like ispell or aspell and use a package in Emacs to do spell checking, then fix words with a handful of shortcuts.https://adamfallon.com/til-setup-a-yubikey.htmlhttps://adamfallon.com/til-setup-a-yubikey.htmlChange the default PIN and PUK on a YubiKey with the YubiKey Authenticator app, since it defaults to 123456 and you don't want that in case someone finds your key.https://adamfallon.com/til-retrieve-secret-from-gcp-secret-manager.htmlhttps://adamfallon.com/til-retrieve-secret-from-gcp-secret-manager.htmlList the secrets in a GCP project and read the latest version of one with gcloud, grepping out just the bit you need.https://adamfallon.com/til-mx-command-line.htmlhttps://adamfallon.com/til-mx-command-line.htmlTo get the mail (MX) records for a domain, you can ask dig for them from the command line.https://adamfallon.com/til-sql-looking-for-json.htmlhttps://adamfallon.com/til-sql-looking-for-json.htmlTo dig into a JSON blob in Postgres, use the @> containment operator to match objects inside a JSON array.https://adamfallon.com/til-lock-picking.htmlhttps://adamfallon.com/til-lock-picking.htmlTo lock pick a pin tumbler you need two tools: a tensioner and a pick. Then you push the pins up past the shear line so you can turn the key.https://adamfallon.com/til-mirror-folders.htmlhttps://adamfallon.com/til-mirror-folders.htmlUsing rsync you can mirror one folder to another, deleting anything in the destination that isn't in the source.https://adamfallon.com/til-public-claims.htmlhttps://adamfallon.com/til-public-claims.htmlTo make a claim now that you only want to reveal later, you can shasum the message, post the hash publicly, then reveal the original later to prove it matches.https://adamfallon.com/til-sql-data-range.htmlhttps://adamfallon.com/til-sql-data-range.htmlTo grab rows between two dates, use BETWEEN in your WHERE clause.https://adamfallon.com/til-get-fingerprint-of-ssh-key.htmlhttps://adamfallon.com/til-get-fingerprint-of-ssh-key.htmlOn github.com your SSH keys show a fingerprint, not the full public key. So if you had multiple keys, how could you figure out which one maps back to the one on GitHub?https://adamfallon.com/til-grep.htmlhttps://adamfallon.com/til-grep.htmlSearch files recursively for a term with line numbers, or pipe find into grep to match on file names.https://adamfallon.com/til-find-in-use-ports.htmlhttps://adamfallon.com/til-find-in-use-ports.htmlHow do I tell what ports are in use on my computer?https://adamfallon.com/til-exporting-sql-query-to-csv.htmlhttps://adamfallon.com/til-exporting-sql-query-to-csv.htmlWrap psql in a small shell function and use COPY ... TO STDOUT WITH (FORMAT csv, HEADER true) to export a query straight to a CSV file.https://adamfallon.com/til-describe-a-gcp-cloud-run-job.htmlhttps://adamfallon.com/til-describe-a-gcp-cloud-run-job.htmlRunning gcloud run jobs describe shows a Cloud Run job's tasks, parallelism, container image, memory and more.https://adamfallon.com/til-create-new-role-in-postgres.htmlhttps://adamfallon.com/til-create-new-role-in-postgres.htmlGrant a new Postgres user connect, schema usage and table privileges, then check what they've been granted.