knktc's Notes

When Docker cannot start because its graph directory is corrupted, cleaning /var/lib/docker may be the only practical recovery path.

A practical way to duplicate a KVM snapshot by copying the qcow2 image and adapting the exported libvirt snapshot XML.

On systems where Python 2 and Python 3 coexist, uWSGI may start with the wrong interpreter and fail to import Django.

Use nested KVM and host-passthrough CPU settings to run an Android x86 emulator with acceleration inside a KVM guest.

Use drf-dynamic-fields to let API callers choose which serializer fields to include or omit through query parameters.

Use Postman test scripts to extract tokens from cookies or JSON responses and store them as reusable variables for later requests.

A quick note showing how to insert post-local images in Hexo using post_asset_folder.

A short note about creating the PYAJS GitHub organization as a casual group for tinkering with both frontend and backend work.

If a RabbitMQ password contains characters like ?, URL-encode it before building the Celery broker URL.

On Fedora 25, Docker may fail to start offline because NetworkManager does not create resolv.conf unless a network is active.