Changeset a2e0f7d

Timestamp:

05/02/2022 02:47:13 PM (2 years ago)

Author:

William Harrington <kb0iic@…>

Branches:

arm

Children:

f157277

Parents:

df692bb

git-author:

Xi Ruoyao <xry111@…> (05/02/2022 07:36:03 AM)

git-committer:

William Harrington <kb0iic@…> (05/02/2022 02:47:13 PM)

Message:

explain the usage of 65534

File:

• chapter07/createfiles.xml (modified) (1 diff)

chapter07/createfiles.xml

@@ -170 +170 @@
   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