diff --git a/cd.sh b/cd.sh
index 2ca6f20..eddae10 100644
--- a/cd.sh
+++ b/cd.sh
@@ -68,6 +68,7 @@ cd_set_environment_variables () {
         "${CD_OS_DEBIAN}"|"${CD_OS_UBUNTU}")
             CD_OS_VERSION="$(cd_grep_os VERSION_CODENAME)"
         ;;
+        *)
     esac
     # check operating system version
     case "${CD_OS_ID}" in
@@ -107,6 +108,7 @@ cd_set_environment_variables () {
                 *) cd_error_os "CD_OS_VERSION" ;;
             esac
         ;;
+        *)
     esac
     cd_split
     cd_echo "CD_OS_ID" "CD_OS_VERSION"
@@ -137,6 +139,7 @@ cd_set_environment_variables () {
             CD_CA_ROOT="/usr/local/share/ca-certificates"
             CD_CMD_CA="update-ca-certificates"
         ;;
+        *)
     esac
     cd_split
     cd_echo "CD_CA_ROOT" "CD_CMD_CA"
@@ -154,6 +157,7 @@ cd_set_environment_variables () {
         "${CD_OS_ARCH}")
             CD_PM="${CD_PM_PACMAN}"
         ;;
+        *)
     esac
     cd_split
     cd_echo "CD_PM"
@@ -227,6 +231,7 @@ Dir::Etc::SourceParts \"\";
 Acquire::https::Verify-Peer False;
 "
         ;;
+        *)
     esac
     cd_split
     cd_echo "CD_PM_CLEAN" \
@@ -256,6 +261,7 @@ Acquire::https::Verify-Peer False;
         "${CD_OS_UBUNTU}")
             CD_URL_DEFAULT="http://archive.ubuntu.com/ubuntu"
         ;;
+        *)
     esac
     CD_URL_CHOSEN="${CD_URL_DEFAULT}"
     case "${CD_OS_ID}" in
@@ -284,6 +290,7 @@ Acquire::https::Verify-Peer False;
             [ -n "${CD_URL_UBUNTU}" ] && CD_URL_CHOSEN="${CD_URL_UBUNTU}" \
             || CD_URL_CHOSEN="https://ubuntu.mirrors.ovh.net/ubuntu"
         ;;
+        *)
     esac
     cd_split
     cd_echo "CD_URL_DEFAULT" "CD_URL_CHOSEN"
@@ -305,6 +312,7 @@ Acquire::https::Verify-Peer False;
             case "${CD_OS_VERSION}" in
                 "bookworm") CD_PYTHON_COMMAND="python3.11" ;;
                 "bullseye") CD_PYTHON_COMMAND="python3.9" ;;
+                *)
             esac
             CD_PYTHON_PACKAGE="python3"
         ;;
@@ -316,9 +324,11 @@ Acquire::https::Verify-Peer False;
             case "${CD_OS_VERSION}" in
                 "noble") CD_PYTHON_COMMAND="python3.12" ;;
                 "jammy") CD_PYTHON_COMMAND="python3.10" ;;
+                *)
             esac
             CD_PYTHON_PACKAGE="python3"
         ;;
+        *)
     esac
     # set python packages
     case "${CD_OS_ID}" in
@@ -331,6 +341,7 @@ Acquire::https::Verify-Peer False;
         "${CD_OS_DEBIAN}"|"${CD_OS_UBUNTU}")
             CD_PYTHON_PACKAGES="/usr/lib/${CD_PYTHON_ALIAS}/dist-packages"
         ;;
+        *)
     esac
     cd_split
     cd_echo "CD_PYTHON_COMMAND" "CD_PYTHON_PACKAGE" "CD_PYTHON_PACKAGES"