All newlines are removed when saving cat output into a variable

问题

I have the following file

linux$ cat test.txt
toto
titi
tete
tata

Saving the cat output into a variable will discard the newlines

linux$ msgs=`cat test.txt`
linux$ echo $msgs
toto titi tete tata

How to keep the output containing the newlines in the variables?

回答1:

The shell is splitting the msgs variable so echo get multiple parameters. You need to quote your variable to prevent this to happen:

echo "$msgs"

回答2:

I had this:

echo $(cat myfile.sh) >> destination.sh

that was causing the problem, so I changed it to:

cat myfile.sh >> destination.sh

and that worked, lulz

回答3:

you can use the redirection "|"

echo | cat test.txt

来源：https://stackoverflow.com/questions/18018359/all-newlines-are-removed-when-saving-cat-output-into-a-variable