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| author | Bruce Dubbs <bdubbs@linuxfromscratch.org> | 2022-05-04 20:22:53 -0500 |
|---|---|---|
| committer | Bruce Dubbs <bdubbs@linuxfromscratch.org> | 2022-05-04 20:22:53 -0500 |
| commit | f164a246c2843c4218e6fb497559c99bb8e557f2 (patch) | |
| tree | ebaa90b4e925bf7203df9bb7c801b9048ab81fe2 | |
| parent | d6cba09c7c65fe0a18af5e6811ec19db053f6037 (diff) | |
| parent | 7c862eac22b81a8224a9b9c549bb2eebb3f77b7f (diff) | |
Merge branch 'trunk' of git.linuxfromscratch.org:lfs into trunk
| -rw-r--r-- | chapter07/createfiles.xml | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/chapter07/createfiles.xml b/chapter07/createfiles.xml index 7df2acde6..eda30ed2e 100644 --- a/chapter07/createfiles.xml +++ b/chapter07/createfiles.xml @@ -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 > /etc/group << "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—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 |