Actually, in this case, no it won't. Your own shell will parse $TMP_DIR and replace it with the output of mktemp, and then execute it. Its only really bad if s

Actually, in this case, no it won't. Your own shell will parse $TMP_DIR and replace it with the output of mktemp, and then execute it. Its only really bad if some does the following: rm -rf /$TMP_DIR The slash is important