bash 脚本不工作，无法发现任何错误

Question

这里是新用户，对不起，如果我没有正确发布，但我已经盯着这段代码看了好几个小时了，我找不到它有什么问题，我之前写了一些代码非常相似并且有效好的，请让我知道我做错了什么。

#!/bin/bash

export TERM=xterm
while true
do
    clear #Gets rid of previous output
    #displays main menu
    menu="Main menu: 
    showMan = Show the manual path.
    addMan = Add an item to the manual path.
    setMan = Set the manual path to '/man'.
    fileName = Enter filename.
    editFile = Edit file.
    headDisplay = How many lines to display of the head of the file?
    tailDisplay = How many lines to display of the tail of the file?
    listProcess = listing of processes
    userProcess = Processes run by user
    quit = Exit"
    echo -e "$menu";
    read -r option 
    #gets user choice
    clear
    case $option in
    "showMan") 
        echo $MANPATH 
        ;;

    "addMan")
        echo "Add an item"
        read -r item
        export MANPATH="$MANPATH:$item"
        ;;

    "setMan")
        export MANPATH="/man"
        ;;

    "fileName")
        echo "Enter filename:"
        read -r filename
        ;;

    "editFile")
        nano "$filename"
        ;;

    "headDisplay")
        echo "How many lines of code to display from top of the file?:"
        read -r numLines
        head -"$numLines" "$filename"
        ;;

    "tailDisplay")
        echo "How many lines of code to display from bottom of the file?:"
        read -r numLines
        tail -"$numLines" "$filename"
        ;;

    "listProcess")
        ps -ef
        ;;

    "userProcess")
        echo "Please enter username:"
        read -r username
        ps -u "$username" | sed 1d | wc -l
        ;;

    "quit")
        exit
        ;;

    *)
        echo "Invalid input."
        ;;
    esac

    #Asks user if they want to continue
    echo "Would you like to continue?  (Y/n)"
    read -r input
    if [ "$input" == "n" ]; then
        exit
    fi
done

Answer 1

你的问题是脚本开头的 she-bang:

#!/bin/bash

这会指示您当前的 shell 使用此 interpreter/shell 来执行脚本。在您的情况下，它在 /bin/bash.

找不到可执行文件

要解决此问题，您应该将其更改为 bash shell 可执行文件的位置（您可以使用 "which bash" 找到它）或删除它以使用当前 shell.

我更喜欢路径修复，因为如果您在脚本中使用 bash 特定命令和语句，如果您使用不同的 shell 作为默认值，它将中断。

bash 脚本不工作，无法发现任何错误

bash script not working, cant spot any errors

linux

bash

ubuntu

case-statement