diff --git a/introduction/important/beyond.xml b/introduction/important/beyond.xml
index baef1559a3..34c7f1e991 100644
--- a/introduction/important/beyond.xml
+++ b/introduction/important/beyond.xml
@@ -42,7 +42,7 @@
       to <filename>/etc/ld.so.conf</filename> or expand
       <envar>LD_LIBRARY_PATH</envar> to include it. Before using the latter
       option, check out <ulink
-      url="http://xahlee.org/UnixResource_dir/_/ldpath.html"/>.
+      url="http://xahlee.info/UnixResource_dir/_/ldpath.html"/>.
       If you modify <filename>/etc/ld.so.conf</filename>, remember to update
       <filename>/etc/ld.so.cache</filename> by executing
       <command>ldconfig</command> as the
@@ -81,13 +81,14 @@
 
   <itemizedlist>
     <listitem>
-      <para>If you know the name of the package, then search Freecode for
-      it at <ulink url="http://freecode.com/"/>. Also search Google at
-      <ulink url="http://google.com/"/>. Sometimes a search for the
-      <filename class='extension'>rpm</filename> at
-      <ulink url="http://rpmfind.net/"/> or the
+      <para>If you know the name of the package, then search SourceForge for
+      it at <ulink url="https://sourceforge.net/directory/"/>, and search
+      GitHub for it at <ulink url="https://github.com/"/>.
+      Also search Google at <ulink url="https://google.com/"/>. Sometimes a
+      search for the <filename class='extension'>rpm</filename> at
+      <ulink url="https://rpmfind.net/"/> or the
       <filename class='extension'>deb</filename> at
-      <ulink url="http://www.debian.org/distrib/packages#search_packages"/> can
+      <ulink url="https://www.debian.org/distrib/packages#search_packages"/> can
       also lead to a link to the package.</para>
     </listitem>
     <listitem>
@@ -95,7 +96,7 @@
       that the executable belongs to, first try a Google search with the name
       of the executable. If the results are overwhelming, try searching for the
       given executable in the Debian repository at <ulink
-      url="http://www.debian.org/distrib/packages#search_contents"/>.</para>
+      url="https://www.debian.org/distrib/packages#search_contents"/>.</para>
     </listitem>
   </itemizedlist>
 
@@ -132,7 +133,7 @@
       problems:</para>
       <itemizedlist>
         <listitem>
-          <para>Arch <ulink url="http://www.archlinux.org/packages/"/> - enter
+          <para>Arch <ulink url="https://www.archlinux.org/packages/"/> - enter
           the package name in the 'Keywords' box, select the package name,
           select the 'Source Files' field, and then select the
           <filename>PKGBUILD</filename> entry to see how they build this
@@ -140,10 +141,7 @@
         </listitem>
         <listitem>
           <para>Debian
-          <!-- 2020-11-11 : ftp hangs trying to connect, presumably removed.
-               Use http because firefox says the certificate at this gb site is
-               not valid for ftp.uk.debian.org -->
-          <ulink url="http://ftp.uk.debian.org/debian/pool"/> (use your country's
+          <ulink url="https://ftp.debian.org/debian/pool"/> (use your country's
           version if there is one) - the source will be in .tar.gz tarballs (either
           the original upstream <filename class='extension'>.orig</filename> source,
           or else a <filename>dfsg</filename> containing those parts which comply
@@ -172,7 +170,7 @@
           <para>Gentoo - the mirrors for ebuilds and patches seem to be well-hidden,
           and they change frequently.  Also, if you have found a mirror, you need to
           know which directory the application has been assigned to.  The ebuilds
-          themselves can be found at <ulink url="http://packages.gentoo.org/"/> -
+          themselves can be found at <ulink url="https://packages.gentoo.org/"/> -
           use the search field.  If there are any patches, a mirror will have them
           in the <filename class="directory">files/</filename> directory. Depending
           on your browser, or the mirror, you might need to download the ebuild to
@@ -183,13 +181,13 @@
         </listitem>
         <listitem>
           <para>openSUSE provide a rolling release, some package versions are in
-          <ulink url="http://download.opensuse.org/source/tumbleweed/repo/oss/src/"/>
+          <ulink url="https://download.opensuse.org/source/tumbleweed/repo/oss/src/"/>
           but others are in ../update/openSUSE-current/src - the
           source only seems to be available in source rpms.</para>
         </listitem>
         <listitem>
           <para>Slackware - the official package browser is currently broken.  The
-          site at <ulink url="http://slackbuilds.org/"/> has current and previous
+          site at <ulink url="https://slackbuilds.org/"/> has current and previous
           versions in their unofficial repository with links to homepages, downloads,
           and some individual files, particularly the <filename>.SlackBuild</filename>
           files.</para>
@@ -214,7 +212,7 @@
     into a simple <filename>tar.gz</filename> format.</para>
     <para>You may also find an rpm2cpio script useful.  The Perl version in the
     linux kernel archives at <ulink
-    url="http://lkml.indiana.edu/hypermail/linux/kernel/0210.2/att-0093/01-rpm2cpio"/>
+    url="https://lore.kernel.org/all/20021016121842.GA2292@ncsu.edu/2-rpm2cpio"/>
     works for most source rpms.  The rpm2targz script will use an rpm2cpio script
     or binary if one is on your path.  Note that rpm2cpio will unpack a source
     rpm in the current directory, giving a tarball, a spec file, and perhaps patches
diff --git a/introduction/important/building-notes.xml b/introduction/important/building-notes.xml
index 7341a68ed8..20cc0638e4 100644
--- a/introduction/important/building-notes.xml
+++ b/introduction/important/building-notes.xml
@@ -608,7 +608,7 @@ chmod 755 blfs-yes-test2</userinput></screen>
 
     <para>
       For more information on stripping, see <ulink
-      url="http://www.technovelty.org/linux/stripping-shared-libraries.html"/>.
+      url="https://www.technovelty.org/linux/stripping-shared-libraries.html"/>.
     </para>
 
   </sect2>
diff --git a/introduction/important/locale-issues.xml b/introduction/important/locale-issues.xml
index 8bf079dd17..e42eafbd56 100644
--- a/introduction/important/locale-issues.xml
+++ b/introduction/important/locale-issues.xml
@@ -115,7 +115,7 @@
 
     <para>In extreme cases, Windows encoding compatibility issues may be
     solved only by running Windows programs under
-    <ulink url="http://www.winehq.com/">Wine</ulink>.</para>
+    <ulink url="https://www.winehq.com/">Wine</ulink>.</para>
 
   </sect2>
 
@@ -160,7 +160,7 @@
 
     <para>The general rule for avoiding this class of problems is to
     avoid installing broken programs. If this is impossible, the
-    <ulink url="http://j3e.de/linux/convmv/">convmv</ulink>
+    <ulink url="https://j3e.de/linux/convmv/">convmv</ulink>
     command-line tool can be used to fix filenames created by these
     broken programs, or intentionally mangle the existing filenames
     to meet the broken expectations of such programs.</para>
diff --git a/introduction/welcome/acknowledgments.xml b/introduction/welcome/acknowledgments.xml
index b0d3720ea8..52143d7cf5 100644
--- a/introduction/welcome/acknowledgments.xml
+++ b/introduction/welcome/acknowledgments.xml
@@ -38,9 +38,8 @@
       linuxfromscratch.com domain names.</para>
     </listitem>
     <listitem>
-      <para><ulink url="http://www.dreamwvr.com/services">DREAMWVR.COM</ulink>
-      for their ongoing sponsorship by donating various resources to the
-      LFS and related sub projects.</para>
+      <para>DREAMWVR.COM for their sponsorship by donating various resources to
+      the LFS and related sub projects.</para>
     </listitem>
     <listitem>
       <para>Bruce Dubbs for donating the anduin package server and his