Shell 脚本变量替换字符 [英] Shell script variable replacing characters

问题描述

我有一个变量 var="abcde$$$$$$$$fff$$gg".我想用空格 ' ' 替换所有 $ 但下面只放一个空格

I have a variable var="abcde$$$$$$$$fff$$gg". I want to replace all $ with space ' ' but the following puts just one space

var=$( echo "$var" | tr '$' ' ')

我怎样才能全部替换它们?

How can i replace them all?

推荐答案

对我有用.您需要使用单引号或转义美元符号，否则它们将从双引号字符串中删除:

Works for me. You'll need to use single quotes or escape the dollar signs, otherwise they are removed from the double-quoted string:

echo 'abcde$$$$$$$$fff$$gg' | tr '$' ' '
abcde        fff  gg

echo "abcde\$\$\$\$\$\$\$\$fff\$\$gg" | tr '$' ' '
abcde        fff  gg

echo abcde\$\$\$\$\$\$\$\$fff\$\$gg | tr '$' ' '
abcde        fff  gg

echo $'abcde$$$$$$$$fff$$gg' | tr '$' ' '
abcde        fff  gg

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