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 $         


        

Answer 1

You can also group multiple commands in the one liner

[ -f "filename" ] || ( echo test1 && echo test2 && echo test3 )

or

[ -f "filename" ] || { echo test1 && echo test2 && echo test3 ;}

If filename doesn't exit, the output will be

test1
test2
test3

Note: ( ... ) runs in a subshell, { ... ;} runs in the same shell. The curly bracket notation works in bash only.