diff --git a/scripts/utilities/execute.sh b/scripts/utilities/execute.sh
new file mode 100644
index 000000000..f90f1c134
--- /dev/null
+++ b/scripts/utilities/execute.sh
@@ -0,0 +1,121 @@
+#!/bin/bash
+# variables.sh
+# addMessage.sh
+# execute.sh (needs to be 755).
+
+# Execute the specified command.
+# Normally the command is built-in, but allow for an arbitrary command.
+# Many commands are referenced in addMessage.sh and the command name
+# is one of its IDs, e.g., ${AM_...}.
+
+# Allow this script to be executed manually, which requires several variables to be set.
+[[ -z ${ALLSKY_HOME} ]] && export ALLSKY_HOME="$( realpath "$( dirname "${BASH_ARGV0}" )/.." )"
+ME="$( basename "${BASH_ARGV0}" )"
+
+#shellcheck source-path=.
+source "${ALLSKY_HOME}/variables.sh"		|| exit "${EXIT_ERROR_STOP}"
+#shellcheck source-path=scripts
+source "${ALLSKY_SCRIPTS}/functions.sh"		|| exit "${EXIT_ERROR_STOP}"
+
+OK="true"
+DO_HELP="false"
+while [[ $# -gt 0 ]]; do
+	ARG="${1}"
+	case "${ARG,,}" in
+		--help)
+			DO_HELP="true"
+			;;
+		-*)
+			echo -e "${RED}Unknown argument '${ARG}' ignoring.${NC}" >&2
+			OK="false"
+			;;
+		*)
+			break
+			;;
+	esac
+	shift
+done
+
+usage_and_exit()
+{
+	local RET=${1}
+	{
+		echo
+		[[ ${RET} -ne 0 ]] && echo -en "${RED}"
+		echo "Usage: ${ME} [--help] command [arguments...]"
+		[[ ${RET} -ne 0 ]] && echo -en "${NC}"
+	} >&2
+	exit "${RET}"
+}
+
+[[ ${DO_HELP} == "true" ]] && usage_and_exit 0
+[[ ${OK} == "false" || $# -eq 0 ]] && usage_and_exit 1
+
+
+function rm_msg()
+{
+	local FILE="$1"
+
+	local R   RET_CODE
+
+	R="$( rm -r "${FILE}" 2>&1 )"	# -r in case it's a directory
+	RET_CODE=$?
+
+	if [[ ${RET_CODE} -eq 0 ]]; then
+		echo "Removed '${FILE}'"
+	else
+		echo "Unable to remove '${FILE}': ${R}" >&2
+	fi
+	return ${RET_CODE}
+}
+
+RET=0
+CMD="${1}"
+case "${CMD}" in
+	"AM_RM_PRIOR")		# Remove prior version of Allsky
+		rm_msg "${PRIOR_ALLSKY_DIR}" 
+		RET=$?
+		rm -f "${OLD_ALLSKY_REMINDER}"
+
+		"${ALLSKY_SCRIPTS}/addMessage.sh" --id "${CMD}" --delete
+		;;
+
+	"AM_RM_CHECK")		# Remove log from checkAllsky.sh
+		rm_msg "${CHECK_ALLSKY_LOG}"
+		RET=$?
+
+		"${ALLSKY_SCRIPTS}/addMessage.sh" --id "${CMD}" --delete
+		;;
+
+	"AM_RM_POST")		# Remove log from checkAllsky.sh
+		rm_msg "${POST_INSTALLATION_ACTIONS}"
+		RET=$?
+
+		"${ALLSKY_SCRIPTS}/addMessage.sh" --id "${CMD}" --delete
+		;;
+
+	"AM_NOT_SUPPORTED")		# Not supported camera
+		CT="$2"
+		shift
+		"${ALLSKY_UTILITIES}/show_supported_cameras.sh" --${CT}
+
+		"${ALLSKY_SCRIPTS}/addMessage.sh" --id "${CMD}" --delete
+		;;
+
+	AM_*)
+		echo "${ME}: ERROR: Unknown error ID: '${CMD}'." >&2
+		exit 1
+		;;
+
+	*)		# Arbitrary command
+		eval "${*}"
+		RET=$?
+		if [[ ${RET} -eq 0 ]]; then
+			echo "Executed ${*}"
+		else
+			echo "Unable to execute ${*}"
+		fi
+		;;
+esac
+
+exit ${RET}