docs: document default installation paths#3034
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Adds a section explaining where Deno is installed by default on each platform, how to customize the install directory, and where the cache is stored. Closes #2799 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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May 14, 2026
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The macOS cache path is wrong: the new section says "$HOME/.cache/deno on macOS/Linux", but on macOS DENO_DIR defaults to $HOME/Library/Caches/deno. deno info's own example output in runtime/reference/cli/info.md:125 shows "/Users/deno/Library/Caches/deno" — split macOS out from Linux in the table or paragraph.
- nit:
last_modified: 2026-03-05not bumped — adding a new H2 section is substantive per the repo's style guide. - nit: #3114 and #3112 also edit this file (testing-your-installation section and
DENO_INSTALLcustomisation, respectively). TheDENO_INSTALLsentence here and #3112's section will overlap; worth coordinating merge order with @bartlomieju.
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Summary
DENO_INSTALLcustomization and cache directory locationsCloses #2799
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