if files exist bash code example

Example 1: check if file exists bash

FILE=/etc/resolv.conf
if [ -f "$FILE" ]; then
    echo "$FILE exists."
else 
    echo "$FILE does not exist."
fi

Example 2: .sh script: check if file exist

#!/bin/bash
if [ -e x.txt ]
then
    echo "ok"
else
    echo "nok"
fi

Example 3: zsh check if file exists

FILE=/etc/resolv.conf
if [[ -f "$FILE" ]]; then
    echo "$FILE exists."
fi

Example 4: bash script if file exists

[ -f /etc/resolv.conf ] && echo "$FILE exists."

Example 5: if file exist

file_exists ( string $filename ) : bool