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doc/idmap: Clarify subuid/subgid configuration #1353

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doc/idmap: Clarify subuid/subgid configuration #1353

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6 changes: 5 additions & 1 deletion doc/userns-idmap.md
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Expand Up @@ -26,7 +26,7 @@ kernels but will refuse to start containers.
## Allowed ranges

On most hosts, Incus will check `/etc/subuid` and `/etc/subgid` for
allocations for the `incus` user and on first start, set the default
allocations for the `root` user and on first start, set the default
profile to use the first 65536 UIDs and GIDs from that range.

If the range is shorter than 65536 (which includes no range at all),
Expand Down Expand Up @@ -91,3 +91,7 @@ host, and the third entry is the range inside the container. These ranges must
be the same size.

This property requires a container reboot to take effect.

Remember that you may need to add an entry for the `root` user into
`/etc/subid` and/or `/etc/subgid` so the container is allowed to make
use of it.
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