Ajout exercice sur les wildcards

docs/pages/bash/bash-4-working_with_files_and_directories.md

@@ -289,15 +289,20 @@ Well Bash does carry out a very powerful feature, the `filename expansion`, a pr
     ```
     Excellent this one match all files ending in `.fastq`.
 
+!!! question "Using `touch`, create a file called `dataC.fastq`in the `data` folder"
 
-
-!!! question "Now copy all the fastq files using a single command thanks to the `*` filename expansion."
+??? example "Click to show the solution"  
+    ```bash
+    touch /home/<user_name>/data/dataC.fastq 
+    ```
+  
+!!! question "Now copy only the fastq files ending by `A.fastq` or `B.fastq`"
 
 ??? example "Click to show the solution"  
     ```bash
-    cp ../data/*.fastq .
+    cp ../data/*[AB].fastq .
     ```
-    Very convenient isn't it?
+