bash 将 cat 输出保存到变量中时，所有换行符都将被删除
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All newlines are removed when saving cat ouput into a variable
提问by MOHAMED
I have the following file
我有以下文件
linux$ cat test.txt
toto
titi
tete
tata
Saving the cat output into a variable will discard the newlines
将 cat 输出保存到变量中将丢弃换行符
linux$ msgs=`cat test.txt`
linux$ echo $msgs
toto titi tete tata
How to keep the output containing the newlines in the variables?
如何在变量中保留包含换行符的输出？
回答by jlliagre
The shell is splitting the msgsvariable so echoget multiple parameters.
You need to quote your variable to prevent this to happen:
shell 正在拆分msgs变量，因此echo获取多个参数。您需要引用您的变量以防止发生这种情况：
echo "$msgs"
回答by Alexander Mills
I had this:
我有这个：
echo $(cat myfile.sh) >> destination.sh
that was causing the problem, so I changed it to:
那是导致问题的原因，所以我将其更改为：
cat myfile.sh >> destination.sh
and that worked, lulz
那行得通，lulz
回答by alexis
you can use the redirection "|"
您可以使用重定向“|”
echo | cat test.txt
