From: "Dmitry V. Levin" <ldv@altlinux.org>
To: devel@lists.altlinux.org
Subject: Re: [devel] UID_MIN/GID_MIN 500 -> 1000
Date: Wed, 26 Apr 2023 13:29:51 +0300
Message-ID: <20230426102950.GA24412@altlinux.org> (raw)
In-Reply-To: <20230421125407.GB3677@altlinux.org>
On Fri, Apr 21, 2023 at 03:54:07PM +0300, Alexey V. Vissarionov wrote:
> Good ${greeting_time}!
>
> On 2023-04-20 16:30:56 +0300, Alexey Shabalin wrote:
>
> >> Есть мысль увеличить UID_MIN/GID_MIN по умолчанию до 1000
> > Еще бы хорошо перейти на uid=gid=65534 для nobody
> > https://github.com/systemd/systemd/blob/main/docs/UIDS-GIDS.md
>
> А вот этого делать точно не надо, так как 65534 - совершенно
> валидный UID из диапазона [UID_MIN;4294967294].
overflowgid & overflowuid
-------------------------
Some filesystems only support 16-bit UIDs and GIDs, although in Linux
UIDs and GIDs are 32 bits. When one of these filesystems is mounted
with writes enabled, any UID or GID that would exceed 65535 is translated
to a fixed value before being written to disk.
These sysctls allow you to change the value of the fixed UID and GID.
The default is 65534.
--
ldv
next prev parent reply other threads:[~2023-04-26 10:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-20 11:15 Mikhail Efremov
2023-04-20 13:30 ` Alexey Shabalin
2023-04-21 12:54 ` Alexey V. Vissarionov
2023-04-26 10:29 ` Dmitry V. Levin [this message]
2023-04-26 12:09 ` Alexey Shabalin
2023-04-28 5:24 ` Alexey V. Vissarionov
2023-04-20 16:23 ` Leonid Krivoshein
2023-04-20 16:30 ` Ivan A. Melnikov
2023-04-20 16:39 ` Mikhail Efremov
2023-04-20 16:47 ` Ruslandh
2023-04-21 8:41 ` Mikhail Efremov
2023-04-20 18:51 ` Vladimir D. Seleznev
2023-04-21 8:38 ` Mikhail Efremov
2023-04-21 12:09 ` Alexey Gladkov
2023-04-21 12:36 ` Vladislav Zavjalov
2023-04-21 12:59 ` Alexey V. Vissarionov
2023-04-20 21:43 ` Dmitry V. Levin
2023-04-21 8:37 ` Mikhail Efremov
2023-04-21 9:17 ` Sergey V Turchin
2023-04-21 12:50 ` Alexey V. Vissarionov
2023-04-25 16:43 ` Mikhail Efremov
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