diff --git a/pages/common/zcat.md b/pages/common/zcat.md
index 4b0d7aec38..374413b94f 100644
--- a/pages/common/zcat.md
+++ b/pages/common/zcat.md
@@ -1,6 +1,7 @@
 # zcat
 
 > Print data from gzip compressed files.
+> More information: <https://www.gnu.org/software/gzip/manual/gzip.html>.
 
 - Print the uncompressed contents of a gzipped file to the standard output:
 
diff --git a/pages/common/zdb.md b/pages/common/zdb.md
index a1726c8362..163f7e9468 100644
--- a/pages/common/zdb.md
+++ b/pages/common/zdb.md
@@ -1,6 +1,7 @@
 # zdb
 
 > ZFS debugger.
+> More information: <https://manned.org/zdb>.
 
 - Show detailed configuration of all mounted ZFS zpools:
 
diff --git a/pages/common/zfs.md b/pages/common/zfs.md
index a387343407..0a7347c482 100644
--- a/pages/common/zfs.md
+++ b/pages/common/zfs.md
@@ -1,6 +1,7 @@
 # zfs
 
 > Manage ZFS filesystems.
+> More information: <https://manned.org/zfs>.
 
 - List all available zfs filesystems:
 
diff --git a/pages/common/zip.md b/pages/common/zip.md
index 379cfbef80..287db935b7 100644
--- a/pages/common/zip.md
+++ b/pages/common/zip.md
@@ -1,6 +1,7 @@
 # zip
 
 > Package and compress (archive) files into zip file.
+> More information: <https://manned.org/zip>.
 
 - Package and compress files and directories [r]ecursively:
 
diff --git a/pages/common/zless.md b/pages/common/zless.md
index 19188479e4..094b2cc45f 100644
--- a/pages/common/zless.md
+++ b/pages/common/zless.md
@@ -1,6 +1,7 @@
 # zless
 
 > View compressed files.
+> More information: <https://manned.org/zless>.
 
 - Page through a compressed archive with `less`:
 
diff --git a/pages/common/zpool.md b/pages/common/zpool.md
index 6bbe9f1bde..7e7e6fbcaa 100644
--- a/pages/common/zpool.md
+++ b/pages/common/zpool.md
@@ -1,6 +1,7 @@
 # zpool
 
 > Manage ZFS pools.
+> More information: <https://manned.org/zpool>.
 
 - Show the configuration and status of all ZFS zpools: