bash variable interpolation separate variables by a hyphen or underscore

Question

This is a simple script just to see if the file has been downloaded. On this script the find command always evaluated to zero - even if it didn\'t find anything. So I commen

Answer 1

You can use backslash to do that.

# filename=test
# yesterday=somedate
# echo $filename_$yesterday.csv
somedate.csv
# echo $filename\_$yesterday.csv
test_somedate.csv
#