在 Linux shell 脚本中处理输入确认
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Handling input confirmations in Linux shell scripting
提问by Obinwanne Hill
I'm writing a Linux Shell Script to automate a few things I'm doing on Ubuntu 11.04.
我正在编写一个 Linux Shell 脚本来自动化我在 Ubuntu 11.04 上所做的一些事情。
Basically, I'm writing a shell script to install NGINX, MySQL, and PHP, and then configure everything. I know how to do everything via the command-line.
基本上，我正在编写一个 shell 脚本来安装 NGINX、MySQL 和 PHP，然后配置所有内容。我知道如何通过命令行完成所有操作。
However, I don't know how I'm going to handle the parts where the process asks for user input. For example, certain things I install with apt-get ask you for a confirmation i.e. (Y)es or (N)o.
但是，我不知道我将如何处理流程要求用户输入的部分。例如，我使用 apt-get 安装的某些东西会要求您确认，即 (Y)es 或 (N)o。
How exactly would I handle auto-confirmation in the shell script i.e. to automatically confirm Yes or No when asked?
我将如何处理 shell 脚本中的自动确认，即在询问时自动确认是或否？
采纳答案by wormsparty
yes | ./scriptwill answer yfor everything.
yes | ./script会回答 y一切。
Otherwise, write a script that prints the answers you want, eg:
否则，编写一个脚本来打印您想要的答案，例如：
echo N
echo Y
echo Y
回答by tripleee
For Apt, the correct answer is to "preseed" your debconfdatabase with the correct parameters. If Debconf finds the answer from its database, it won't ask. See also http://www.debian-administration.org/articles/394
对于 Apt，正确的答案是debconf使用正确的参数“预置”您的数据库。如果 Debconf 从它的数据库中找到答案，它就不会询问。另见http://www.debian-administration.org/articles/394
回答by touffy
Usually you can call such interactive programs with an option to automatically answer yes to all questions. For instance, you can call apt-getwith -y. From the man page :
通常，您可以调用此类交互式程序，并选择自动对所有问题回答“是”。例如，您可以apt-get使用-y. 从手册页：
-y, --yes, --assume-yes Automatic yes to prompts; assume "yes" as answer to all prompts and run non-interactively.
-y, --yes, --assume-yes 提示自动是；假设“是”作为对所有提示的回答并以非交互方式运行。
