tree to markdown command

basics/tree.md

@@ -1,6 +1,6 @@
 ---
 title: "tree"
-tags: [ "basics" ]
+tags: [ "basics", "tree", "markdown" ]
 ---
 
 The `tree` utility outputs a full listing of everything in your current directory, and those below.
@@ -23,3 +23,14 @@ README.md
 ```
 
 Each description-line starts with a tab.
+
+## Markdown Conversion
+
+To represent a file structure as a nested series of markdown lists, you can try this horrifying `sed` one-liner:
+
+```bash
+tree -tf --dirsfirst --gitignore --noreport --charset ascii  | \
+    sed -e 's/| \+/  /g' \
+    -e 's/[|`]-\+/ */g' \
+    -e 's:\(* \)\(\(.*/\)\([^/]\+\)\):\1[\4](\2):g'
+```

data/sqlite.md

@@ -0,0 +1,21 @@
+---
+title: "sqlite"
+tags: [ "Documentation", "data" ]
+---
+
+Work with a database:
+
+```bash
+sqlite3 "$FILE".sqlite3
+```
+Compress the database:
+
+```sqlite
+pragma vacuum;
+```
+Optimize the database:
+
+```sqlite
+pragma optimize;
+```
+