Check file exists in Bash

## True if file exists.

[[ -a ${file} ]]

## True if file exists and is a block special file.

[[ -b ${file} ]]

## True if file exists and is a character special file.

[[ -c ${file} ]]

## True if file exists and is a directory.

[[ -d ${file} ]]

## True if file exists.

[[ -e ${file} ]]

## True if file exists and is a regular file.

[[ -f ${file} ]]

## True if file exists and is a symbolic link.

[[ -h ${file} ]]

## True if file exists and is readable.

[[ -r ${file} ]]

## True if file exists and has a size greater than zero.

[[ -s ${file} ]]

## True if file exists and is writable.

[[ -w ${file} ]]

## True if file exists and is executable.

[[ -x ${file} ]]

## True if file exists and is a symbolic link.

[[ -L ${file} ]]