Echo a string with a variable in it without expanding/evaluating it

If you need $date inside the variable var:

var='file.$date.txt'

That will keep the $ inside the variable:

$ echo "$var" | grep '\$'
file.$date.txt

Use single quotes around variables to prevent shell expansion. Example echo '$file' will not expand $file.

Edit after comment below:

You can escape the $ sign int the var variable with var="file.\$DATE.txt".

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