split setup note

shell/shell_tips.md

@@ -0,0 +1,37 @@
+---
+title: Shell tips
+tags: 
+- shell
+- comfy
+---
+
+# This & That
+
+Refer to 'that last thing', and 'the first thing':
+
+```sh
+fortune -l > file1
+cat !$  | tr -d u
+diff !^ !$
+```
+
+**NB:** this can go wrong:
+
+```sh
+ls -l file1 file2
+cat !^
+```
+
+# Done
+
+`<C-d>`
+
+- If you have a command, Control + d will execute the command.
+- If you have nothing, `exit`.
+
+# Clear Search Highlights
+
+`<Esc>+u`
+
+Works in most programs with search.
+