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自动按 [Y] 的终端命令是什么？

tag-icon • tag-icon ubuntu terminal
自动按 [Y] 的终端命令是什么？

例如：如果我喜欢

sudo apt-get upgrade

那么在安装更新之前我可能会收到 y/n 问题。自动接受它的参数是什么。

答案1

有两种方法可以做到这一点：

Apt-get 具体内容：

$man apt-get
[...]
-y, --yes, --assume-yes
       Automatic yes to prompts; assume "yes" as answer to all prompts
       and run non-interactively. If an undesirable situation,
       such as changing a held package, trying to install a unauthenticated
       package or removing an essential package occurs then apt-get will abort. 
[...]
--force-yes
       Force yes; this is a dangerous option that will cause apt to continue
       without prompting if it is doing something potentially harmful.
       It should not be used except in very special situations.
       Using force-yes can potentially destroy your system!

常规：yes命令：

$man yes
yes - output a string repeatedly until killed [...]
DESCRIPTION
   Repeatedly output a line with all specified STRING(s), or 'y'.

由于yes无法了解内部情况，因此apt-get它可能等同于--force-yes危险的。如果您仍想这样做，可以将 的输出通过管道传输yes到 中apt-get：

yes | apt-get update

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