我的错误信息在终端闪烁而不是停留，我如何让它停留？

Question

我有一个基本的菜单来完成已经设置给我的任务，我有菜单显示和工作的功能，但是，当用户选择选项4时，结果只在终端中闪烁一瞬间，而且如果他们选择了一个不正确的值，错误消息闪烁，我需要他们都留在原地。有什么想法吗？

#!/bin/bash
#
# Script to perform some simple tasks
#
chmod 755 TaskB.sh
while:
do
clear
echo "*********************"
echo "* Tools *"
echo "*********************"
echo "* [1] Install gnome-disk-utility and gparted *"
echo "* [2] Create CET103Demo.txt *"
echo "* [3] Delete CET103Demo.txt *"
echo "* [4] Search BASH *"
echo "* [0] Exit/Stop *"
echo "*********************"
echo -n "Enter your menu choice [0-4]: "
read yourch
case $yourch in
1) sudo apt-get install gparted gnome-disk-utility ;;
2) cat > Desktop/CET103Demo.txt;;
3) rm Desktop/CET103Demo.txt;;
4) grep -H -r "BASH" /home/mintuser/.profile ;;
0) exit 0;;
*) echo "Oooops!!! Please select choice 1,2,3,4 or 0";
echo "Press Enter to continue..."; read ;;
esac
done

Answer 1

我已经有一段时间没有使用bash了，但是试试这个：

#!/bin/bash
#
# Script to perform some simple tasks
#
chmod 755 TaskB.sh
while:
do
clear
echo "*********************"
echo "* Tools *"
echo "*********************"
echo "* [1] Install gnome-disk-utility and gparted *"
echo "* [2] Create CET103Demo.txt *"
echo "* [3] Delete CET103Demo.txt *"
echo "* [4] Search BASH *"
echo "* [0] Exit/Stop *"
echo "*********************"
echo -n "Enter your menu choice [0-4]: "
read yourch
case $yourch in
1) sudo apt-get install gparted gnome-disk-utility ;;
2) cat > Desktop/CET103Demo.txt;;
3) rm Desktop/CET103Demo.txt;;
4) grep -H -r "BASH" /home/mintuser/.profile ;;
0) exit 0;;
*) echo "Oooops!!! Please select choice 1,2,3,4 or 0" ;;
esac
read -p "Press [Enter] to continue..."
done
read -p "Press [Enter] to exit..."