yes: add French translation, add common usage example (#4624)

pages/common/yes.md

@@ -1,6 +1,7 @@
 # yes
 
 > Output something repeatedly.
+> This command is commonly used to answer yes to every prompt by install commands (such as apt-get).
 
 - Repeatedly output "message":
 
@@ -9,3 +10,7 @@
 - Repeatedly output "y":
 
 `yes`
+
+- Accept everything prompted by the `apt-get` command:
+
+`yes | sudo apt-get install {{program}}`