将多行输出放在变量内 [英] place a multi-line output inside a variable

问题描述

我正在用bash编写脚本，我希望它执行命令并分别处理每一行.例如:

I'm writing a script in bash and I want it to execute a command and to handle each line separately. for example:

LINES=$(df)
echo $LINES

它将返回所有将空格换成新行的输出.

it will return all the output converting new lines with spaces.

示例:

如果输出应为:

1
2
3

那我会得到

1 2 3

如何将命令的输出放到允许新行仍然是新行的变量中，所以当我打印变量时，我将获得正确的输出?

how can I place the output of a command into a variable allowing new lines to still be new lines so when I print the variable i will get proper output?

推荐答案

通常在bash中， $ v 会在大多数情况下带来麻烦.几乎总是您真正的意思是双引号中的"$ v" .

Generally in bash $v is asking for trouble in most cases. Almost always what you really mean is "$v" in double quotes.

LINES="`df`"     # double-quote + backtick
echo "$LINES"
OLDPATH="$PATH"

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