diff --git a/cd.sh b/cd.sh
index 05827d4..eb39539 100644
--- a/cd.sh
+++ b/cd.sh
@@ -90,7 +90,6 @@ cd_set_environment_variables () {
     cd_echo "CD_OS_ID" "CD_OS_VERSION"
     # universal
     CD_DNS_FILE="/etc/resolv.conf"
-    CD_PKG_CA="ca-certificates"
     CD_PKG_GIT="git"
     cd_split
     cd_echo "CD_DNS_FILE" "CD_PKG_CA" "CD_PKG_GIT"
@@ -112,8 +111,10 @@ cd_set_environment_variables () {
         "${CD_OS_ALMA}"|"${CD_OS_ROCKY}")
             CD_CMD_CLEAN="dnf clean all"
             CD_CMD_INSTALL="dnf install --assumeyes"
+            CD_CMD_QUERY="rpm --query"
             CD_CMD_UPDATE="dnf makecache"
             CD_CMD_UPGRADE="dnf upgrade --assumeyes"
+            CD_PKG_CA="ca-certificates"
             CD_PKG_PKG=""
             CD_PM_CONF_PATH="/etc/dnf/dnf.conf"
             CD_PM_CONF_TEXT="\
@@ -130,8 +131,10 @@ skip_if_unavailable=False
         "${CD_OS_ALPINE}")
             CD_CMD_CLEAN="apk cache purge"
             CD_CMD_INSTALL="apk add"
+            CD_CMD_QUERY="apk info"
             CD_CMD_UPDATE="apk update"
             CD_CMD_UPGRADE="apk upgrade"
+            CD_PKG_CA="ca-certificates-bundle"
             CD_PKG_PKG=""
             CD_PM_CONF_PATH=""
             CD_PM_CONF_TEXT=""
@@ -141,8 +144,10 @@ skip_if_unavailable=False
         "${CD_OS_DEBIAN}"|"${CD_OS_UBUNTU}")
             CD_CMD_CLEAN="apt-get clean"
             CD_CMD_INSTALL="apt-get install --assume-yes"
+            CD_CMD_QUERY="dpkg-query --show"
             CD_CMD_UPDATE="apt-get update"
             CD_CMD_UPGRADE="apt-get upgrade --assume-yes"
+            CD_PKG_CA="ca-certificates"
             CD_PKG_PKG="apt-utils"
             CD_PM_CONF_PATH="/etc/apt/apt.conf.d/apt.conf"
             CD_PM_CONF_TEXT="\
@@ -157,7 +162,8 @@ Dir::Etc::SourceParts \"\";
         ;;
     esac
     cd_split
-    cd_echo "CD_CMD_CLEAN" "CD_CMD_INSTALL" "CD_CMD_UPDATE" "CD_CMD_UPGRADE"
+    cd_echo "CD_CMD_CLEAN" \
+        "CD_CMD_INSTALL" "CD_CMD_QUERY" "CD_CMD_UPDATE" "CD_CMD_UPGRADE"
     cd_split
     cd_echo "CD_PKG_PKG" "CD_PM_CONF_PATH" "CD_PM_HTTPS_PATH"
     # specific