Changeset 94e3e7bd for chapter07/systemd-custom.xml

Timestamp:

12/22/2017 08:18:46 PM (6 years ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

3b4e848

Parents:

896e77e

Message:

Update to linux-4.14.8.
Add discussion of ethernet device names (systemd).
Add discussion of audo file deletion (systemd).
Add discussion of separate /tmp (systemd).

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11340 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:

• chapter07/systemd-custom.xml (modified) (2 diffs)

chapter07/systemd-custom.xml

@@ -54 +54 @@
 <screen role="nodump"><userinput>ln -sfv /dev/null /etc/systemd/system/tmp.mount</userinput></screen>
 
-    <para>This is not necessary if there is a separate partition for
-    <filename class="directory">/tmp</filename> specified in
-    <filename>/etc/fstab</filename>.</para>
+    <para>Alternatively, if a a separate partition for
+    <filename class="directory">/tmp</filename> is desired, specify that 
+    partition in an <filename>/etc/fstab</filename> entry.</para>
+
+    <warning>
+      <para>
+        Do not create the symbolic link above if a separate partition is used
+        for <filename class="directory">/tmp</filename>.  This will prvent the
+        root file system (/) from being remounted r/w and make the system
+        unusable when booted.
+      </para>
+    </warning>
 
   </sect2>
@@ -81 +90 @@
     <filename>tmpfiles.d(5)</filename> manual page  for file format
     details.</para>
+
+    <para>
+      Note that the syntax for the
+      <filename>/usr/lib/tmpfiles.d/*.conf</filename> files can be 
+      confusing.  For example, the default deletion of files in the /tmp directory
+      is located in <filename>/usr/lib/tmpfiles.d/tmp.conf</filename> with 
+      the line:
+
+<screen role="nodump">q /tmp 1777 root root 10d</screen>
+
+      The type field, q, discusses creating a subvolume with quotas which
+      is really only applicable to btrfs filesystems.  It references type v
+      which in turn references type d (directory). This then creates the
+      specified directory if is is not present and adjusts the permissions
+      and ownership as specified.  Contents of the directory will be
+      subject to time based cleanup if the age argument is specified.
+     </para>
+
+     <para>
+      If the default parameters are not desired, then the file should
+      be copied to <filename class="directory">/etc/tmpfiles.d</filename>
+      and edited as desired.  For example:
+
+<screen role="nodump"><userinput>mkdir -p /etc/tempfiles.d
+cp /usr/lib/tmpfiles.d/tmp.conf /etc/tempfiles.d</userinput></screen>
+     </para>
 
   </sect2>