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feat: pos network download replace <gid> <url> + fresh-link status advisory

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Give a dead single-file HTTP/FTP download a fresh URL: same dir + file name
(--continue=true resumes the partial), forgets the old source from
download.retry, verifies the new link (a dead replacement is diagnosed and
marked permanent instead of silently looping). status flags downloads needing
this with a 'needs fresh link' line. Torrents/active/multi-file rejected with
hints; --dir/--split/--tmux supported.
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2026-08-13 02:14:14 -04:00
parent bd77a3949e
commit 8b3435a8d5
3 changed files with 102 additions and 9 deletions
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DOC/howto/network.md
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@@ -173,6 +173,23 @@ on its own once a download started, so no shell is needed on headless boxes.
remembered in `~/.config/linux_post_install/download.retry` and skipped by
`retry all` — `pos network download restart <gid>` re-queues them by hand.
**Recipe: dead link.** When a source is genuinely gone (404/410), `pos network
download status` flags it:
```
needs fresh link: ubuntu.iso (2e9dffc40e6a1b2c) — pos network download replace 2e9dffc40e6a1b2c <new-url>
```
Give it a working URL — same dir and file name are kept, so the partial file
resumes instead of restarting from zero:
```bash
pos network download replace 2e9dffc40e6a1b2c https://mirror.example.com/ubuntu.iso
```
The old dead source is forgotten, the new link is verified (a dead replacement
is reported and marked permanent instead of silently looping).
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