add forgotten demo2_1

linux_toolkit_2021/index.html

@@ -13,6 +13,8 @@ class: center, middle
 
 # Linux Toolbox
 
+Nils Leuzinger
+
 <img src="images/thealternative-logo.jpg" width="30%">
 
 
@@ -141,7 +143,7 @@ cd ~/Desktop
 
 ---
 
-# Demo
+# Demo: ls, cd
 
  <video width="320" height="240" controls>
   <source src="demos/demo2-2021-04-15_23.12.20.mkv.mp4" type="video/mp4">
@@ -149,6 +151,14 @@ cd ~/Desktop
 
 ---
 
+# Demo: rm, cat
+
+ <video width="320" height="240" controls>
+  <source src="demos/demo2_1-2021-04-15_23.32.44.mkv.mp4" type="video/mp4">
+</video>
+
+---
+
 # Basics: Options
 
  <video width="320" height="240" controls>
@@ -535,7 +545,7 @@ https://www.rexegg.com/
 class: center, middle
 # Overview
 
-<img src="images/category5.jpg" width="70%">
+<img src="images/category5jpg.jpg" width="70%">
 
 ---
 
@@ -628,7 +638,7 @@ for file in *.mkv; do
 done
 ```
 
-(what `ffmpeg` sees: `ffmpeg -i song.wav song.mp3`)
+(what `ffmpeg` sees: `ffmpeg -i demo1.mkv demo1.mp4`)
 
 ---