How do I tell if a regular file does not exist in Bash?

Question

I've used the following script to see if a file exists:

#!/bin/bash  FILE=$1      if [ -f $FILE ]; then    echo "File $FILE exists." else    echo "File $FILE does not exist." fi 

What's the correct syntax to use if I only want to check if the file does not exist?

#!/bin/bash  FILE=$1      if [ $FILE does not exist ]; then    echo "File $FILE does not exist." fi 

Answer 1

The test command ([ here) has a "not" logical operator which is the exclamation point (similar to many other languages). Try this:

if [ ! -f /tmp/foo.txt ]; then     echo "File not found!" fi