Latest Articles

Set the system timezone of Alpine Linux to JST (Asia/Tokyo), including how to do it inside a Dockerfile.

When building a Docker image on a Mac, you might encounter the "no space left on device" error. This can happen even when there seems to be enough storage space available, leaving you puzzled about the cause.

Fix compile errors when installing Python's `grpcio` — workarounds for missing C++ headers and CFLAGS adjustments to make `pip install grpcio` succeed.

Fix screen redraw issues when Mac Quick Look or Finder content is displayed on a DisplayLink-connected screen.

Inspect `django-redis` cached values directly from `manage.py shell` — both `cache.get` and the raw Redis client commands.

Insert a custom HTML snippet or help text into a Django Admin Inline formset (TabularInline / StackedInline) — implementation patterns.

If you want to create a different URL for Django's Admin while keeping /admin/ intact: Create an instance using `from django.contrib.admin import AdminSite` and `site = AdminSite(name='staff')`.

Suppress the geckodriver log file in Selenium Firefox by setting `service_log_path` (or sending it to `os.devnull`).

Detect that an element does not exist with Pyppeteer — catch the `waitForSelector` timeout and return `None`.

When you log in to Ubuntu via SSH, you see the following message: "10 packages can be updated. 5 updates are security updates."

When trying to connect MySQL Client 8.0 to MySQL 5.6, DataGrip displays an error message: "[08S01] Communications link failure java.io.EOFException: SSL peer shut down incorrectly," and the connection fails.

Distinguish 'draft' vs 'published' state for a Mezzanine BlogPost while editing — handling in both Admin and templates.

Install k3s (a lightweight Kubernetes distribution) on a Raspberry Pi (Raspbian) and bring up a single-node cluster — step-by-step.

If you encounter the django.db.utils.InterfaceError: "(0, '')" error When this error occurs intermittently during get operations depending on the table or record, it might be due to a mismatch in the connection character encoding.

If a Django project that has been working until now fails to start after a long time with the following error: ``` version_info, _mysql.version_info, _mysql.__file__ NameError: name '_mysql' is not defined ```

This article introduces a TypeScript decorator code that displays a toast notification when the $axios.$get method fails within an async method in a Nuxt.js application.

When running `python3 ./manage.py runserver 8080`, I encountered the error `django.db.utils.OperationalError: (2000, 'Unknown MySQL error')`. This error occurs when the `OPTIONS` setting includes `'charset': 'utf8mb4'`.

Configure `~/.i2csshrc` so the `i2cssh` command can fan out SSH connections through a bastion / jump host to multiple servers.

Resolve `mkmf.rb can't find header files for ruby` when installing the `i2cssh` Ruby gem — install `ruby-dev` (or `ruby-headers`) and retry the gem install.

Introduction to Python Script Code