diff --git a/pidd.sh b/pidd.sh
index 50d512c..a296a92 100644
--- a/pidd.sh
+++ b/pidd.sh
@@ -72,7 +72,7 @@ pidd_set_environment_variables() {
     esac
     # set operating system version
     case "${PIDD_OS_ID}" in
-        "${PIDD_OS_ALMA}"|"${PIDD_OS_ARCH}"|"${PIDD_OS_FEDORA}"|"${PIDD_OS_ROCKY}")
+        "${PIDD_OS_ALMA}" | "${PIDD_OS_ARCH}" | "${PIDD_OS_FEDORA}" | "${PIDD_OS_ROCKY}")
             PIDD_OS_VERSION=$(pidd_grep_os VERSION_ID \
                 | sed "s|^\([0-9]\+\)\..*|\1|")
         ;;
@@ -80,46 +80,46 @@ pidd_set_environment_variables() {
             PIDD_OS_VERSION=$(pidd_grep_os VERSION_ID \
                 | sed "s|^\([0-9]\+\.[0-9]\+\)\..*|\1|")
         ;;
-        "${PIDD_OS_DEBIAN}"|"${PIDD_OS_UBUNTU}")
+        "${PIDD_OS_DEBIAN}" | "${PIDD_OS_UBUNTU}")
             PIDD_OS_VERSION="$(pidd_grep_os VERSION_CODENAME)"
         ;;
         *) ;;
     esac
     # check operating system version
     case "${PIDD_OS_ID}" in
-        "${PIDD_OS_ALMA}"|"${PIDD_OS_ROCKY}")
+        "${PIDD_OS_ALMA}" | "${PIDD_OS_ROCKY}")
             case "${PIDD_OS_VERSION}" in
-                "8"|"9") ;;
+                "8" | "9") ;;
                 *) pidd_error_os "PIDD_OS_VERSION" ;;
             esac
         ;;
         "${PIDD_OS_ALPINE}")
             case "${PIDD_OS_VERSION}" in
-                "3.18"|"3.19") ;;
+                "3.18" | "3.19") ;;
                 *) pidd_error_os "PIDD_OS_VERSION" ;;
             esac
         ;;
         "${PIDD_OS_ARCH}")
             case "${PIDD_OS_VERSION}" in
-                "20231112"|"20240101") ;;
+                "20231112" | "20240101") ;;
                 *) pidd_error_os "PIDD_OS_VERSION" ;;
             esac
         ;;
         "${PIDD_OS_DEBIAN}")
             case "${PIDD_OS_VERSION}" in
-                "bookworm"|"bullseye") ;;
+                "bookworm" | "bullseye") ;;
                 *) pidd_error_os "PIDD_OS_VERSION" ;;
             esac
         ;;
         "${PIDD_OS_FEDORA}")
             case "${PIDD_OS_VERSION}" in
-                "39"|"40") ;;
+                "39" | "40") ;;
                 *) pidd_error_os "PIDD_OS_VERSION" ;;
             esac
         ;;
         "${PIDD_OS_UBUNTU}")
             case "${PIDD_OS_VERSION}" in
-                "jammy"|"noble") ;;
+                "jammy" | "noble") ;;
                 *) pidd_error_os "PIDD_OS_VERSION" ;;
             esac
         ;;
@@ -138,7 +138,7 @@ pidd_set_environment_variables() {
     pidd_echo "PIDD_DNS_FILE" "PIDD_PKG_CA" "PIDD_PKG_GIT" "PIDD_PYTHON_ALIAS"
     # set ca command & root
     case "${PIDD_OS_ID}" in
-        "${PIDD_OS_ALMA}"|"${PIDD_OS_FEDORA}"|"${PIDD_OS_ROCKY}")
+        "${PIDD_OS_ALMA}" | "${PIDD_OS_FEDORA}" | "${PIDD_OS_ROCKY}")
             PIDD_CA_ROOT="/etc/pki/ca-trust/source/anchors"
             PIDD_CMD_CA="update-ca-trust"
         ;;
@@ -150,7 +150,7 @@ pidd_set_environment_variables() {
             PIDD_CA_ROOT="/etc/ca-certificates/trust-source/anchors"
             PIDD_CMD_CA="update-ca-trust"
         ;;
-        "${PIDD_OS_DEBIAN}"|"${PIDD_OS_UBUNTU}")
+        "${PIDD_OS_DEBIAN}" | "${PIDD_OS_UBUNTU}")
             PIDD_CA_ROOT="/usr/local/share/ca-certificates"
             PIDD_CMD_CA="update-ca-certificates"
         ;;
@@ -163,10 +163,10 @@ pidd_set_environment_variables() {
         "${PIDD_OS_ALPINE}")
             PIDD_PM="${PIDD_PM_APK}"
         ;;
-        "${PIDD_OS_DEBIAN}"|"${PIDD_OS_UBUNTU}")
+        "${PIDD_OS_DEBIAN}" | "${PIDD_OS_UBUNTU}")
             PIDD_PM="${PIDD_PM_APT}"
         ;;
-        "${PIDD_OS_ALMA}"|"${PIDD_OS_FEDORA}"|"${PIDD_OS_ROCKY}")
+        "${PIDD_OS_ALMA}" | "${PIDD_OS_FEDORA}" | "${PIDD_OS_ROCKY}")
             PIDD_PM="${PIDD_PM_DNF}"
         ;;
         "${PIDD_OS_ARCH}")
@@ -311,7 +311,7 @@ Acquire::https::Verify-Peer False;
     pidd_echo "PIDD_URL_DEFAULT" "PIDD_URL_CHOSEN"
     # set python command & package
     case "${PIDD_OS_ID}" in
-        "${PIDD_OS_ALMA}"|"${PIDD_OS_ROCKY}")
+        "${PIDD_OS_ALMA}" | "${PIDD_OS_ROCKY}")
             PIDD_PYTHON_COMMAND="python3.11"
             PIDD_PYTHON_PACKAGE="python3.11"
         ;;
@@ -347,13 +347,13 @@ Acquire::https::Verify-Peer False;
     esac
     # set python packages
     case "${PIDD_OS_ID}" in
-        "${PIDD_OS_ALMA}"|"${PIDD_OS_FEDORA}"|"${PIDD_OS_ROCKY}")
+        "${PIDD_OS_ALMA}" | "${PIDD_OS_FEDORA}" | "${PIDD_OS_ROCKY}")
             PIDD_PYTHON_PACKAGES="/usr/lib64/${PIDD_PYTHON_COMMAND}/site-packages"
         ;;
-        "${PIDD_OS_ALPINE}"|"${PIDD_OS_ARCH}")
+        "${PIDD_OS_ALPINE}" | "${PIDD_OS_ARCH}")
             PIDD_PYTHON_PACKAGES="/usr/lib/${PIDD_PYTHON_COMMAND}/site-packages"
         ;;
-        "${PIDD_OS_DEBIAN}"|"${PIDD_OS_UBUNTU}")
+        "${PIDD_OS_DEBIAN}" | "${PIDD_OS_UBUNTU}")
             PIDD_PYTHON_PACKAGES="/usr/lib/${PIDD_PYTHON_ALIAS}/dist-packages"
         ;;
         *) ;;
@@ -436,7 +436,7 @@ Acquire::https::Verify-Peer False;
         "PIDD_PROJECT_PATH" "PIDD_PROJECT_NAME" "PIDD_PROJECT_BRANCH"
     # TODO move to Python
     case "${PIDD_PM}" in
-        "${PIDD_PM_APK}"|"${PIDD_PM_APT}") PIDD_PKG_SSH="openssh-client" ;;
+        "${PIDD_PM_APK}" | "${PIDD_PM_APT}") PIDD_PKG_SSH="openssh-client" ;;
         "${PIDD_PM_DNF}") PIDD_PKG_SSH="openssh-clients" ;;
         "${PIDD_PM_PACMAN}") PIDD_PKG_SSH="openssh" ;;
         *) ;;
@@ -501,7 +501,7 @@ pidd_set_packages_configuration() {
     pidd_step "Set packages configuration"
     pidd_write "${PIDD_PM_CONF_PATH}" "${PIDD_PM_CONF_TEXT}"
     case "${PIDD_OS_ID}" in
-        "${PIDD_OS_DEBIAN}"|"${PIDD_OS_UBUNTU}")
+        "${PIDD_OS_DEBIAN}" | "${PIDD_OS_UBUNTU}")
             export DEBIAN_FRONTEND="noninteractive"
         ;;
         *) ;;