diff --git a/certificates/essentials/exercises_sudomateo.md b/certificates/essentials/exercises_sudomateo.md
index 2f6a1ae..1299d3a 100644
--- a/certificates/essentials/exercises_sudomateo.md
+++ b/certificates/essentials/exercises_sudomateo.md
@@ -36,7 +36,7 @@ total 0
 -r--------. 1 vagrant vagrant 0 Aug 23 01:10 file02
 -rw-r-x--x. 1 vagrant vagrant 0 Aug 23 01:10 file03
 -rwsr--r--. 1 vagrant vagrant 0 Aug 23 01:10 file04
--rw-rw-r--. 1 vagrant vagrant 0 Aug 23 01:10 file05
+-rwSrw-r--. 1 vagrant vagrant 0 Aug 23 01:10 file05
 -r--r--r-T. 1 vagrant vagrant 0 Aug 23 01:10 file06
 ```
 6. Run the commmand `tar -zcvf /tmp/managing-files.tgz -C /tmp/managing-files .` to create an archive named `/tmp/managing-files.tgz` of all the files in the `/tmp/managing-files` directory.