bash shell "Would you like to continue [Y / n]"

Question

I would like to write a script that automates the execution of sudo apt-get remove ffmpeg x264 libvpx libav-tools-dev libx264-dev. This command displays at the middle of the execution: Would you like to continue [Y / n]? I want my script to execute without having to ask me to type "Y" to continue.

I added just after this command: echo -e "Y\r", but it is not considered?

#!/bin/bash
sudo apt-get remove ffmpeg x264 libav-tools libvpx-dev libx264-dev

echo -e "Y\r"

Answer 1

The most general way of automatically answering these questions is to use the yes utility and pipe it into whatever other program is asking them. e.g.

yes | sudo apt-get remove ffmpeg x264 libav-tools libvpx-dev libx264-dev

However, as @Rohan says, in this case apt-get has equivalent functionality built in, so use that instead.

(NB. you can customise the string yes outputs. E.g. one could answer "n" to every question like:

yes n | sudo apt-get remove ffmpeg x264 libav-tools libvpx-dev libx264-dev

)

Answer 2

Specify -y to your apt-get command:

sudo apt-get remove ffmpeg x264 libav-tools libvpx-dev libx264-dev

From apt-get --help

-y  Assume Yes to all queries and do not prompt