diff --git a/exercises/UNIX_HPC_exercise_instructions.md b/exercises/UNIX_HPC_exercise_instructions.md
index 04a6d45e143f0fc1d3c4c6e956fa3a1d2ef27a3c..9a78ecb463c11ea94d157cfb157134ca8106b4b3 100644
--- a/exercises/UNIX_HPC_exercise_instructions.md
+++ b/exercises/UNIX_HPC_exercise_instructions.md
@@ -295,8 +295,8 @@
 
 3. **In VSCode, write a simple script called `copy_and_rename.sh`.** 
 
-   * Create an empty text file and save it into your `intro_to_unix` directory as `copy_and_rename.sh`.
-   * In a for loop, go through all fasta files starting with "ompA". 
+   * Create an empty text file and save it into your `intro_to_unix` directory as `copy_and_rename.sh`. On the command line, type `chmod 764 cope_and_rename.sh` - this will you give you permission to execute the script. 
+   * Write your script: In a for loop, go through all fasta files starting with "ompA". 
    * Copy each fasta file. For the name of the new copy, replace "ompA" with "outerMembraneProteinA". 
    * Run the script from within your `intro_to_unix` folder. 
    * *Hint:* Think about our previous exercise where we extracted the variant number. You can use a similar approach here.