diff --git a/wiki/unix/archives.m4 b/wiki/unix/archives.m4
new file mode 100644
index 0000000..ce45d9d
--- /dev/null
+++ b/wiki/unix/archives.m4
@@ -0,0 +1,6 @@
+_header(`Archives')
+
+_subheader(`cpio')
+_bibliography(`
+_bentr(`_link(`cpio', `https://en.wikipedia.org/wiki/Cpio') (Wikipedia)')
+')
diff --git a/wiki/unix/index.m4 b/wiki/unix/index.m4
index f00cf78..f07eb44 100644
--- a/wiki/unix/index.m4
+++ b/wiki/unix/index.m4
@@ -13,6 +13,8 @@ include(`alpine.m4')
 
 include(`arch.m4')
 
+include(`archives.m4')
+
 include(`C.m4')
 
 include(`culture.m4')
diff --git a/wiki/unix/linux.m4 b/wiki/unix/linux.m4
index 3a1c126..7443935 100644
--- a/wiki/unix/linux.m4
+++ b/wiki/unix/linux.m4
@@ -83,6 +83,16 @@ _subsubheader(_ref(`#alpine'))
 _subsubheader(_ref(`#arch'))
 _subsubheader(_ref(`#debian'))
 
+_subheader(`initramfs')
+_bibliography(`
+_bentr(`_link(`Initial ramdisk', `https://en.wikipedia.org/wiki/Initial_ramdisk') (Wikipedia)')
+_bentr(`_link(`initramfs', `https://wiki.debian.org/initramfs') (Debian Wiki)')
+_bentr(`_link(`initramfs', `https://wiki.ubuntu.com/Initramfs') (Ubuntu Wiki)')
+')
+<P>
+_file(`initramfs') is a _ref(`#archives#cpio') archive that contains a small Linux filesystem with just enough utility to mount the actual operating system's root filesystem.
+</P>
+
 _subheader(`logind')
 _bibliography(`
 _bentr(`<A HREF="https://github.com/elogind/elogind">elogind</A>')