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Software, devices and technical concepts, explained clearly.

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Technology

Show-ref: checking an exact local reference

git show-ref lists locally known references and identifiers. With --verify it requires an exact path such as refs/heads/main rather than an ambiguous abbreviated match.

Published22 Oct 2026
Technology

Shutil.copy2: copying does not preserve every attribute

shutil.copy2() attempts to preserve more file metadata than merely copying contents. The documentation warns that even high-level copying cannot transfer every attribute on every platfo...

Published22 Oct 2026
Technology

Signal: platform and thread boundaries matter

signal exposes operating-system signal handling. Python handlers run in the main thread of the main interpreter, and available signals vary by platform.

Published22 Oct 2026