diff --git a/protected_resources/scripts/install-config-ssh.sh b/protected_resources/scripts/install-config-ssh.sh
index ac7cc01..9ffcccf 100644
--- a/protected_resources/scripts/install-config-ssh.sh
+++ b/protected_resources/scripts/install-config-ssh.sh
@@ -1,10 +1,11 @@
 #!/bin/bash
 
-if which ssh >/dev/null 2>&1; then
-    echo "SSH is installed"
-    exit 1
+# check if ssh is installed
+if ! command -v ssh &>/dev/null; then
+  echo "SSH is not installed"
 else
-    echo "SSH is not installed"
+  echo "SSH is already installed"
+  exit 1
 fi
 
 if lsb_release -a 2>/dev/null | grep -q -E "Debian|Ubuntu"; then