diff --git a/installs/PostgreSqlUbuntu.md b/installs/PostgreSqlUbuntu.md
index af91ae3..980e257 100644
--- a/installs/PostgreSqlUbuntu.md
+++ b/installs/PostgreSqlUbuntu.md
@@ -91,4 +91,4 @@ exit psql:\
 switch back to your os user:\
 `exit`
 
-[go mack to main installation](https://github.com/geolba/tethys/wiki#step-4.-download-and-install-tethys)
+[go mack to main installation](https://github.com/geolba/tethys/wiki#step-4-download-and-install-tethys)
diff --git a/installs/SystemToolsUbuntu.md b/installs/SystemToolsUbuntu.md
index 30f2c94..7e55838 100644
--- a/installs/SystemToolsUbuntu.md
+++ b/installs/SystemToolsUbuntu.md
@@ -8,7 +8,7 @@
 
 **install curl:**
 
-`sudo apt install curl, unzip'
+`sudo apt install curl, unzip`
 
 ## Installation Nginx WebServer