[Technology] quotes

Another good reason to encapsulate bash variables in quotes:

If you have multilined data that you're going to echo, the quotes will preserve the newlines.

$ DATA="foo
bar";
$ echo $DATA
foo bar
$ echo "$DATA"
foo
bar
$

The first reason I tend to think of is so spaces in file names aren't mistranslated as separators between arguments.

$ FILENAME="foo bar.txt"
$ ls -l $FILENAME
ls: cannot access foo: No such file or directory
ls: cannot access bar.txt: No such file or directory
$ ls -l "$FILENAME"
-rw-rw-r--. 1 user group 0 27. Jul 18:03 foo bar.txt
$