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Merge branch 'trunk' of git.linuxfromscratch.org:lfs into trunk

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Bruce Dubbs 2022-05-04 20:22:53 -05:00
commit f164a246c2
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28
chapter07/createfiles.xml
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@ -116,8 +116,8 @@ mail:x:34:
kvm:x:61:
uuidd:x:80:
wheel:x:97:
nogroup:x:65534:
users:x:999:</literal>
users:x:999:
nogroup:x:65534:</literal>
EOF</userinput></screen>
<screen revision="systemd"><userinput>cat &gt; /etc/group &lt;&lt; "EOF"
@ -153,8 +153,8 @@ systemd-coredump:x:79:
uuidd:x:80:
systemd-oom:x:81:
wheel:x:97:
nogroup:x:65534:
users:x:999:</literal>
users:x:999:
nogroup:x:65534:</literal>
EOF</userinput></screen>
<para>The created groups are not part of any standard&mdash;they are groups
@ -165,9 +165,23 @@ EOF</userinput></screen>
url="http://refspecs.linuxfoundation.org/lsb.shtml"/>) only recommends that,
besides the group <systemitem class="groupname">root</systemitem> with a
Group ID (GID) of 0, a group <systemitem class="groupname">bin</systemitem>
with a GID of 1 be present. All other group names and GIDs can be chosen
freely by the system administrator since well-written programs do not depend
on GID numbers, but rather use the group's name.</para>
with a GID of 1 be present. The GID of 5 is widely used for
<systemitem class="groupname">tty</systemitem> group, and the number 5 is
also used in <phrase revision="systemd">systemd</phrase>
<phrase revision="sysv"><filename>/etc/fstab</filename></phrase> for the
<systemitem class="filesystem">devpts</systemitem> filesystem.
All other group names and GIDs can be chosen 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 and groups (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