Remove scp example

We should only **recommend** one solution (here, rsync).

lectures/command-line/slides.qmd

@@ -146,23 +146,16 @@ Different ways to work on a cluster depending on the task:
 
 ## Remote file transfer {auto-animate=true}
 
-* There are different tools to transfer between your local machine and a remote server
-* For single files, a simple `scp` is sufficient
-  ```{raw}
-  scp <YOUR_USERNAME>@levante.dkrz.de:file_in_home .
-  ```
-* `rsync` is a more powerful alternative
+* There are various tools to transfer data between your local machine and a remote server (e.g. [`scp`](https://linux.die.net/man/1/scp), [`rsync`](https://linux.die.net/man/1/rsync), [`uftp`](https://uftp-multicast.sourceforge.net))
+* `rsync` is a powerful option available on most machines
   ```{raw}
   rsync <YOUR_USERNAME>@levante.dkrz.de:file_in_home .
   ```
 
 ## Remote file transfer {auto-animate=true visibility="uncounted"}
-* There are different tools to transfer between your local machine and a remote server
-* For single files, a simple `scp` is sufficient
-  ```{raw}
-  scp levante:file_in_home .
-  ```
-* `rsync` is a more powerful alternative with more options
+
+* There are various tools to transfer data between your local machine and a remote server (e.g. [`scp`](https://linux.die.net/man/1/scp), [`rsync`](https://linux.die.net/man/1/rsync), [`uftp`](https://uftp-multicast.sourceforge.net))
+* `rsync` is a powerful option available on most machines
   ```{raw}
   rsync levante:file_in_home .
   ```