bash - 如何在bash中显示和刷新多行

Question

我正在编写一个安装脚本，并希望在它进行时显示脚本的状态。

例子:

var1="pending"
var2="pending"
var3="pending"

print_status () {
echo "Status of Item 1 is: "$var1""
echo "Status of Item 2 is: "$var2""
echo "Status of Item 3 is: "$var3""
}

code that does something and then refreshes the
output above as the status of each variable changes.

Answer 1

这段代码应该让您明白:

while :; do
    echo "$RANDOM"
    echo "$RANDOM"
    echo "$RANDOM"
    sleep 0.2
    tput cuu1 # move cursor up by one line
    tput el # clear the line
    tput cuu1
    tput el
    tput cuu1
    tput el
done

使用 man tput 获取更多信息。要查看功能列表，请使用 man terminfo