Bash脚本错误127 Debian 11

Question

我有一个简单的bash脚本，可以在Unbuntu 20和LMDE 4上正常工作。但是，当我在Debian 11上运行它时，它会出现错误：

"choices=$("${cmd[@]}" "${options[@]}" 2>&1 >/dev/tty)" command filed with exit code 127.

我正在以根用户的身份运行它，但是我仍然会得到错误。我还检查了www.shellcheck.net的代码，它说一切都很好。这是Debian 11的全新安装。

有什么建议吗？我很感激。

以下是代码：

#!/bin/bash
# exit when any command fails
set -e

# keep track of the last executed command
trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
# echo an error message before exiting
trap 'echo "\"${last_command}\" command filed with exit code $?."' EXIT

cmd=(dialog --separate-output --checklist "Select options:" 22 76 16)
options=(1 "Option 1" off    # any option can be set to default to "on"
         2 "Option 2" off
         3 "Option 3" off
         4 "Option 4" off)
choices=$("${cmd[@]}" "${options[@]}" 2>&1 >/dev/tty)
clear
for choice in $choices
do
    case $choice in
        1)  ls
            echo "First Option"
            ;;
        2)  pwd
            echo "Second Option"
            ;;
        3)  pwd
            echo "Third Option"
            ;;
        4)  ls -la
            echo "Fourth Option"
            ;;
    esac
done

Answer 1

它突然击中了我。缺少的是对话。我安装了它，脚本按预期运行。