diff --git a/pages/common/df.md b/pages/common/df.md
index 607f5fdc4..3fe03e994 100644
--- a/pages/common/df.md
+++ b/pages/common/df.md
@@ -1,24 +1,20 @@
 # df
 
-> Gives an overview of the filesystem disk space usage.
-> More information: <https://www.gnu.org/software/coreutils/df>.
+> Display an overview of the filesystem disk space usage.
+> More information: <https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/utilities/df.html>.
 
-- Display all filesystems and their disk usage:
+- Display all filesystems and their disk usage using 512-byte units:
 
 `df`
 
-- Display all filesystems and their disk usage in human-readable form:
-
-`df -h`
-
 - Display the filesystem and its disk usage containing the given file or directory:
 
 `df {{path/to/file_or_directory}}`
 
-- Display statistics on the number of free inodes:
+- Use 1024-byte units when writing space figures:
 
-`df -i`
+`df -k`
 
-- Display filesystems but exclude the specified types:
+- Display information in a portable way:
 
-`df -x {{squashfs}} -x {{tmpfs}}`
+`df -P`
diff --git a/pages/freebsd/df.md b/pages/freebsd/df.md
new file mode 100644
index 000000000..6e2bf603f
--- /dev/null
+++ b/pages/freebsd/df.md
@@ -0,0 +1,32 @@
+# df
+
+> Display an overview of the filesystem disk space usage.
+> More information: <https://man.freebsd.org/cgi/man.cgi?df>.
+
+- Display all filesystems and their disk usage using 512-byte units:
+
+`df`
+
+- Use [h]uman-readable units (based on powers of 1024) and display a grand total:
+
+`df -h -c`
+
+- Use [H]uman-readable units (based on powers of 1000):
+
+`df -{{-si|H}}`
+
+- Display the filesystem and its disk usage containing the given file or directory:
+
+`df {{path/to/file_or_directory}}`
+
+- Include statistics on the number of free and used [i]nodes including the filesystem [T]ypes:
+
+`df -iT`
+
+- Use 1024-byte units when writing space figures:
+
+`df -k`
+
+- Display information in a [P]ortable way:
+
+`df -P`
diff --git a/pages/linux/df.md b/pages/linux/df.md
new file mode 100644
index 000000000..7df56df4a
--- /dev/null
+++ b/pages/linux/df.md
@@ -0,0 +1,24 @@
+# df
+
+> Display an overview of the filesystem disk space usage.
+> More information: <https://www.gnu.org/software/coreutils/df>.
+
+- Display all filesystems and their disk usage:
+
+`df`
+
+- Display all filesystems and their disk usage in human-readable form:
+
+`df -h`
+
+- Display the filesystem and its disk usage containing the given file or directory:
+
+`df {{path/to/file_or_directory}}`
+
+- Include statistics on the number of free inodes:
+
+`df -i`
+
+- Display filesystems but exclude the specified types:
+
+`df -x {{squashfs}} -x {{tmpfs}}`
diff --git a/pages/netbsd/df.md b/pages/netbsd/df.md
new file mode 100644
index 000000000..8fd17e75e
--- /dev/null
+++ b/pages/netbsd/df.md
@@ -0,0 +1,32 @@
+# df
+
+> Display an overview of the filesystem disk space usage.
+> More information: <https://man.netbsd.org/NetBSD-9.3/df.1>.
+
+- Display all filesystems and their disk usage using 512-byte units:
+
+`df`
+
+- Use [h]uman-readable units (based on powers of 1024):
+
+`df -h`
+
+- Display all the fields of the structure(s) returned by `statvfs`:
+
+`df -G`
+
+- Display the filesystem and its disk usage containing the given file or directory:
+
+`df {{path/to/file_or_directory}}`
+
+- Include statistics on the number of free and used [i]nodes:
+
+`df -i`
+
+- Use 1024-byte units when writing space figures:
+
+`df -k`
+
+- Display information in a [P]ortable way:
+
+`df -P`
diff --git a/pages/openbsd/df.md b/pages/openbsd/df.md
new file mode 100644
index 000000000..7f0bf270c
--- /dev/null
+++ b/pages/openbsd/df.md
@@ -0,0 +1,28 @@
+# df
+
+> Display an overview of the filesystem disk space usage.
+> More information: <https://man.openbsd.org/df.1>.
+
+- Display all filesystems and their disk usage using 512-byte units:
+
+`df`
+
+- Display all filesystems and their disk usage in human-readable form (based on powers of 1024):
+
+`df -h`
+
+- Display the filesystem and its disk usage containing the given file or directory:
+
+`df {{path/to/file_or_directory}}`
+
+- Include statistics on the number of free and used [i]nodes:
+
+`df -i`
+
+- Use 1024-byte units when writing space figures:
+
+`df -k`
+
+- Display information in a portable way:
+
+`df -P`
diff --git a/pages/osx/df.md b/pages/osx/df.md
new file mode 100644
index 000000000..9f52b22db
--- /dev/null
+++ b/pages/osx/df.md
@@ -0,0 +1,32 @@
+# df
+
+> Display an overview of the filesystem disk space usage.
+> More information: <https://keith.github.io/xcode-man-pages/df.1.html>.
+
+- Display all filesystems and their disk usage using 512-byte units:
+
+`df`
+
+- Use [h]uman-readable units (based on powers of 1024) and display a grand total:
+
+`df -h -c`
+
+- Use [H]uman-readable units (based on powers of 1000):
+
+`df -{{-si|H}}`
+
+- Display the filesystem and its disk usage containing the given file or directory:
+
+`df {{path/to/file_or_directory}}`
+
+- Include statistics on the number of free and used [i]nodes including the filesystem t[Y]pes:
+
+`df -iY`
+
+- Use 1024-byte units when writing space figures:
+
+`df -k`
+
+- Display information in a [P]ortable way:
+
+`df -P`