linux - Bash 脚本回显，无需按 ENTER

Question

编辑:当前代码

#!/bin/bash
check=0

while [ $check -ne 1 ];
do
        ping -c 1 192.168.150.1 >> /dev/null
        if [ $? -eq 0 ];then
            echo -ne "\nClient is up! We will start the web server"
            touch /etc/apache2/httpd.conf
            echo "ServerName 127.0.0.1" > /etc/apache2/httpd.conf
            /etc/init.d/apache2 start
            if [ $? -eq 0 ];then
            exit 0
            fi
        else
            echo -ne "\nWaiting for client to come online"
            sleep 5;
        fi
done

我目前正在学习一些 Bash 脚本，我希望能够将它回显到终端，而无需按 enter 键继续使用终端。

例如...如果我回显“We are working”，光标将移至末尾并等待我按 Enter 键，然后返回到我可以键入新命令的位置。

server:#
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online
Waiting for client to come online <---- Press Enter here
server:#

Answer 1

我怀疑您的问题与使用 echo -ne '\n...' 而不是简单地 echo '...' 有关。但是，您的整个代码可以大大简化:

#!/bin/bash

while :; do
    until ping -c 1 192.168.150.1 > /dev/null; do
        echo "Waiting for client to come online"
    done
    echo "Client is up! We will start the web server"
    echo "ServerName 127.0.0.1" > /etc/apache2/httpd.conf
    /etc/init.d/apache2 start && break
done