Start terminal section

src/SUMMARY.md

@@ -4,6 +4,7 @@
 
 - [Day 1](day_1/README.md)
   - [Why learn Linux?](day_1/why_linux.md)
+  - [The terminal](day_1/terminal.md)
 - [Day 2](day_2/README.md)
 - [Day 3](day_3/README.md)
 - [Day 4](day_4/README.md)

src/day_1/terminal.md

@@ -0,0 +1,24 @@
+# The terminal
+
+The terminal, the console, the command line. All terms refer to the same thing. Get access to a Linux system and open a terminal. Wait, don't panic!
+
+Many find the terminal frightening. This is the cryptic thing you see hackers in films using! You might ask yourself, what am I doing here? I don't want to break my system or launch a terminator!
+
+Again, don't panic! What you see is just a prompt (usually on a dark background).
+
+Now, how to interact with the terminal? You are probably not seeing a lot of buttons on your terminal. This is because you interact with it (mainly) through your keyboard. But what to type?
+
+It is like a chat with your computer. But your computer is not into memes. It is a soldier waiting for your commands!
+
+Lets enter a command, probably your first command. Type `echo "Hello!"` and press enter:
+
+```console
+$ echo "Hello!"
+Hello!
+```
+
+Congratulation! You did just say hi to your computer and it did even reply! What a charm!
+
+Well, to be more precise, you gave a command to your computer to say "Hello!" and it did that.
+
+I know, I did just brake the romance between you and your computer. I appoligize.