Hi, I'm Nick. I'm a full stack developer and teacher who focuses on building and deploying web apps. Take a look at my blog or courses. https://nickjanetakis.com Tue, 20 Feb 2024 06:47:43 -0500 Tue, 20 Feb 2024 06:47:43 -0500 Jekyll v3.8.1 Automate building and pushing Docker images that support both AMD64 and ARM64 CPU architectures. Tue, 20 Feb 2024 00:00:00 -0500 https://nickjanetakis.com/blog/build-git-tagged-multi-arch-docker-images-with-github-actions https://nickjanetakis.com/blog/build-git-tagged-multi-arch-docker-images-with-github-actions docker This can be handy to support both AMD64 and ARM64 CPU architectures. Build images for X platforms with one command. Tue, 13 Feb 2024 00:00:00 -0500 https://nickjanetakis.com/blog/build-multi-cpu-architecture-docker-images-with-buildx https://nickjanetakis.com/blog/build-multi-cpu-architecture-docker-images-with-buildx docker This could be useful when asking users to input passwords, API tokens or anything you don't want printed to the screen. Tue, 06 Feb 2024 00:00:00 -0500 https://nickjanetakis.com/blog/hiding-user-input-in-a-shell-script https://nickjanetakis.com/blog/hiding-user-input-in-a-shell-script linux I had a recent interaction with a security and surveillance camera supplier that left me pleasantly surprised. Tue, 30 Jan 2024 00:00:00 -0500 https://nickjanetakis.com/blog/never-underestimate-support-and-knowing-your-customer https://nickjanetakis.com/blog/never-underestimate-support-and-knowing-your-customer dev-business We'll cover examples that work with both bash and zsh. We'll go with red for errors and your default color for non-errors. Tue, 23 Jan 2024 00:00:00 -0500 https://nickjanetakis.com/blog/color-your-shell-prompt-red-if-the-last-command-threw-an-error https://nickjanetakis.com/blog/color-your-shell-prompt-red-if-the-last-command-threw-an-error linux Sometimes they appear to do the same thing but there is quite a big difference between both solutions. Tue, 16 Jan 2024 00:00:00 -0500 https://nickjanetakis.com/blog/difference-between-double-ampersand-and-semicolon-in-a-shell-script https://nickjanetakis.com/blog/difference-between-double-ampersand-and-semicolon-in-a-shell-script linux Most of the time things go smoothly but what happens if you add a plugin to your config and it doesn't work? Tue, 09 Jan 2024 00:00:00 -0500 https://nickjanetakis.com/blog/troubleshooting-steps-for-when-a-vim-plugin-is-not-working https://nickjanetakis.com/blog/troubleshooting-steps-for-when-a-vim-plugin-is-not-working vim This could be handy if you're running multi-hour commands and want to see how long they took afterwards. Tue, 02 Jan 2024 00:00:00 -0500 https://nickjanetakis.com/blog/docker-tip-96-see-how-long-a-container-ran-for https://nickjanetakis.com/blog/docker-tip-96-see-how-long-a-container-ran-for docker Treat yourself by automating mundane tasks like setting a bunch of YAML properties from true to false and vice versa. Tue, 26 Dec 2023 00:00:00 -0500 https://nickjanetakis.com/blog/automate-suspending-kubernetes-cron-jobs-with-find-and-sed https://nickjanetakis.com/blog/automate-suspending-kubernetes-cron-jobs-with-find-and-sed linux You may need to make a slight modification to your create_celery_app function when updating to Python 3.12. Tue, 19 Dec 2023 00:00:00 -0500 https://nickjanetakis.com/blog/getting-celery-to-work-with-python-312-and-flask-3 https://nickjanetakis.com/blog/getting-celery-to-work-with-python-312-and-flask-3 flask This is a fairly compatible way that works on most distros of Linux and macOS without needing extra dependencies. Tue, 12 Dec 2023 00:00:00 -0500 https://nickjanetakis.com/blog/get-the-md5-hash-of-a-file-with-openssl https://nickjanetakis.com/blog/get-the-md5-hash-of-a-file-with-openssl linux Cherry picking lets you apply 1 or more commits from one branch to another, it shouldn't be abused but it does have its place. Tue, 05 Dec 2023 00:00:00 -0500 https://nickjanetakis.com/blog/git-cherry-pick-examples-to-apply-hot-fixes-and-security-patches https://nickjanetakis.com/blog/git-cherry-pick-examples-to-apply-hot-fixes-and-security-patches linux It's never fun to accidentally leak secrets in git committed files. Here's a few ways to help address them in your code base. Tue, 28 Nov 2023 00:00:00 -0500 https://nickjanetakis.com/blog/help-find-and-remove-hard-coded-passwords-and-secrets-in-a-project https://nickjanetakis.com/blog/help-find-and-remove-hard-coded-passwords-and-secrets-in-a-project flask ruby-on-rails This could be useful to compare activity across multiple repos. Tue, 21 Nov 2023 00:00:00 -0500 https://nickjanetakis.com/blog/count-all-git-commits-in-a-repo https://nickjanetakis.com/blog/count-all-git-commits-in-a-repo linux This lets us quickly preview files in less or whatever tool you prefer. Tue, 14 Nov 2023 00:00:00 -0500 https://nickjanetakis.com/blog/customize-fzf-ctrl-t-binding-to-preview-files https://nickjanetakis.com/blog/customize-fzf-ctrl-t-binding-to-preview-files linux Easily confirm if a file is really a jpg, png, gz or whatever file you want. We'll use the od command line tool or Python and Ruby. Tue, 07 Nov 2023 00:00:00 -0500 https://nickjanetakis.com/blog/validate-file-types-by-reading-the-first-few-bytes-of-a-file https://nickjanetakis.com/blog/validate-file-types-by-reading-the-first-few-bytes-of-a-file flask linux ruby-on-rails We'll get the value back in seconds as well as HH:MM:SS if you prefer. Tue, 31 Oct 2023 00:00:00 -0400 https://nickjanetakis.com/blog/get-video-duration-in-seconds-with-ffmpeg-ffprobe https://nickjanetakis.com/blog/get-video-duration-in-seconds-with-ffmpeg-ffprobe linux This can be handy for brand new releases that haven't been pushed to your operating system's package manager or Docker Desktop yet. Tue, 24 Oct 2023 00:00:00 -0400 https://nickjanetakis.com/blog/install-the-latest-version-of-docker-compose-v2 https://nickjanetakis.com/blog/install-the-latest-version-of-docker-compose-v2 docker This could be useful to remove unwanted lines in a file or output, such as processing a file and writing out a new file to analyze. Tue, 17 Oct 2023 00:00:00 -0400 https://nickjanetakis.com/blog/delete-lines-that-match-a-pattern-or-the-opposite-pattern-using-sed https://nickjanetakis.com/blog/delete-lines-that-match-a-pattern-or-the-opposite-pattern-using-sed linux A common use case is to ask a user to define a path using a tilde but you want that to really be their home directory path. Tue, 10 Oct 2023 00:00:00 -0400 https://nickjanetakis.com/blog/expand-tilde-to-home-directory-when-reading-user-input-in-bash https://nickjanetakis.com/blog/expand-tilde-to-home-directory-when-reading-user-input-in-bash linux This could be handy to dynamically adjust the arguments of a program based on whatever custom condition or criteria you need. Tue, 03 Oct 2023 00:00:00 -0400 https://nickjanetakis.com/blog/modifying-shell-arguments-with-the-set-command https://nickjanetakis.com/blog/modifying-shell-arguments-with-the-set-command linux This can be used to run a command as root outside and inside of Docker where sudo might not be available. Tue, 26 Sep 2023 00:00:00 -0400 https://nickjanetakis.com/blog/ignore-sudo-in-a-shell-script-if-you-are-running-as-root https://nickjanetakis.com/blog/ignore-sudo-in-a-shell-script-if-you-are-running-as-root docker linux When working with package sources you can pass the plain text asc key into signed-by instead of a binary gpg key. Tue, 19 Sep 2023 00:00:00 -0400 https://nickjanetakis.com/blog/reduce-docker-images-by-20mb-by-verifying-apt-packages-without-gnupg https://nickjanetakis.com/blog/reduce-docker-images-by-20mb-by-verifying-apt-packages-without-gnupg docker linux Even the smallest contributes are often welcome and they could lead to internal discussions that promote change. Tue, 12 Sep 2023 00:00:00 -0400 https://nickjanetakis.com/blog/never-underestimate-making-pull-requests-to-update-documentation https://nickjanetakis.com/blog/never-underestimate-making-pull-requests-to-update-documentation docker open-source This can cause pull errors that may lead you down the wrong path or cause fun and exciting errors with anything you're running afterwards. Tue, 05 Sep 2023 00:00:00 -0400 https://nickjanetakis.com/blog/beware-of-dangling-backslashes-in-run-commands-in-your-dockerfile https://nickjanetakis.com/blog/beware-of-dangling-backslashes-in-run-commands-in-your-dockerfile docker