host-notes
Use when binding a service or dev server on the nspawn host, or when a Bash tool command on the Mac loses a temp file, reads an empty pipeline status, or masks a background exit code.
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- davesnx/setup
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- 2026年10月15日 12:23
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- host-notes
- description
- Use when binding a service or dev server on the nspawn host, or when a Bash tool command on the Mac loses a temp file, reads an empty pipeline status, or masks a background exit code.
## nspawn services
When `systemd-detect-virt --container` returns `systemd-nspawn`, bind a service
to `0.0.0.0` on an unused port from `25000-25099`. Reach it at
`febox-uk.ahrefs.net:<port>` while the VPN is on.
## Bash tool on the Mac
- Commands in the sandbox `excludedCommands` setting, such as `make`, `git`,
`gh`, and `docker`, run outside the sandbox and see the system `$TMPDIR`.
Write a file that another command must read to the session scratchpad or the
repository, not to `$TMPDIR`.
- Let a background command's exit code reach the task; do not append an `echo`
that masks it.
- The Bash tool shell is zsh, so `$PIPESTATUS` is empty. Use `$pipestatus[1]`
or `set -o pipefail` to check a pipeline's exit code.
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