added more server tutos in computer

tutos/computer.txt

@@ -14,6 +14,12 @@
 **sftp -P XXXX username@ssh.server.domain** se connecter a un server ssh avec le protocol ftp
 **vim scp://username@ssh.server.domain:XXXX//home/path/to/file** edit a remote file from local vim
 
+
+**install touchegg to allow more touchpad gestures, like pinch-to-zoom**
+	- https://github.com/JoseExposito/touchegg
+	- then I installed the graphical user interface, and i launch it with :
+		**flatpak run com.github.joseexposito.touche**
+
 **having multiples audio in the same time**
 	https://askubuntu.com/questions/78174/play-sound-through-two-or-more-outputs-devices
 	- launch paprefs (pulse audio preferences)