在 5 秒内更改 bash 脚本倒计时延迟
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时间：2020-09-18 11:25:44 来源:igfitidea点击:
Changing bash script countdown delay in 5 sec steps
提问by tubos
I have following command i use in a script as a countdown timer and it works great
我在脚本中使用了以下命令作为倒数计时器，效果很好
# 30 sec Countdown Timer
for i in {30..1};do echo -n "$i." && sleep 1; done
Output:30.29.28.27.26 etc....
But I would like to be able to output in 5sec intervals like
但我希望能够以 5 秒的间隔输出
: 30.25.20.15 etc..
how can i change the script to do this ?
我怎样才能改变脚本来做到这一点？
回答by Cyrus
for i in {30..1..5};do echo -n "$i." && sleep 5; done
回答by Pankaj Singhal
for i in {30..1}
do
if [ $((i%5)) == 0 ]
then
echo -n "$i."
fi
sleep 1
done
回答by Onlyjob
Here is straightforward script compatible with Dash and Bash:
这是与 Dash 和 Bash 兼容的简单脚本：
i=30 && while [ $i -gt 0 ]; do sleep 5; i=$(($i-5)); printf "$i."; done
