diff --git a/adduser.md b/adduser.md
new file mode 100644
index 000000000..9becc26aa
--- /dev/null
+++ b/adduser.md
@@ -0,0 +1,10 @@
+# Adduser
+
+- You usually want [[adduser]], *not* [[useradd]].
+- https://twitter.com/flancian/status/1323303250276339713
+
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[adduser]: adduser "Adduser"
+[useradd]: useradd "Useradd"
+[//end]: # "Autogenerated link references"
\ No newline at end of file
diff --git a/brother-mfc-l2710dw.md b/brother-mfc-l2710dw.md
new file mode 100644
index 000000000..1a84065a6
--- /dev/null
+++ b/brother-mfc-l2710dw.md
@@ -0,0 +1,6 @@
+# Brother Mfc L2710dw
+
+- [[toner]] TN730 (1200 pages)
+  - high yield: TN760  (3000 pages)
+  - super high yield: TN770 (4500)
+
diff --git a/journal/2021-02-16.md b/journal/2021-02-16.md
index 85c99bb26..e62ea64f6 100644
--- a/journal/2021-02-16.md
+++ b/journal/2021-02-16.md
@@ -1,4 +1,7 @@
 # 2021-02-16
 
 - [[siphons]]
-- [[lenovo p14]]
\ No newline at end of file
+- [[push]] [[hardware]]
+  - [[lenovo p14]]
+  - [[brother mfc-l2710dw]]
+- [[adduser]]
\ No newline at end of file
diff --git a/useradd.md b/useradd.md
new file mode 100644
index 000000000..d191d96e3
--- /dev/null
+++ b/useradd.md
@@ -0,0 +1,9 @@
+# Useradd
+
+- [[pull]] [[adduser]]
+
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[pull]: pull "Pull"
+[adduser]: adduser "Adduser"
+[//end]: # "Autogenerated link references"
\ No newline at end of file