MSN: How old your cat REALLY is: Calculator reveals your kitty's 'true age' How old your cat REALLY is: Calculator reveals your kitty's 'true age' The cat <<EOF syntax is very useful when working with multi-line text in Bash, eg. when assigning multi-line string to a shell variable, file or a pipe. Examples of cat <<EOF syntax usage in Bash: Is there replacement for cat on Windows [closed] Asked 17 years, 7 months ago Modified 1 year ago Viewed 553k times