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| author | Xi Ruoyao <xry111@mengyan1223.wang> | 2022-05-02 15:36:03 +0800 |
|---|---|---|
| committer | Xi Ruoyao <xry111@mengyan1223.wang> | 2022-05-02 15:36:03 +0800 |
| commit | 14de4552bfc176646e1365a1bf85035486ced218 (patch) | |
| tree | 5d7b6dc75862e470b6a4f716afe0d66a1d280a0b /chapter07/createfiles.xml | |
| parent | d77e98c7e85b2d0f955ca845af208a733d301bde (diff) | |
explain the usage of 65534
Diffstat (limited to 'chapter07/createfiles.xml')
| -rw-r--r-- | chapter07/createfiles.xml | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/chapter07/createfiles.xml b/chapter07/createfiles.xml index 7df2acde6..ca148f966 100644 --- a/chapter07/createfiles.xml +++ b/chapter07/createfiles.xml @@ -169,6 +169,15 @@ EOF</userinput></screen> freely by the system administrator since well-written programs do not depend on GID numbers, but rather use the group's name.</para> + <para>The ID 65534 is used by the kernel for NFS and separate user + namespaces for unmapped users (those exist on the NFS server or the parent + user namespace, but <quote>do not exist</quote> on the local machine or in + the separate namespace). We assign + <systemitem class="username">nobody</systemitem> and + <systemitem class="groupname">nogroup</systemitem> for it to avoid an + unnamed ID. But other distros may treat this ID differently, so any + portable program should not depend on this assignment.</para> + <para>Some tests in <xref linkend="chapter-building-system"/> need a regular user. We add this user here and delete this account at the end of that chapter.</para> |