Create new file but add number if filename already exists in bash

Question

I found similar questions but not in Linux/Bash

I want my script to create a file with a given name (via user input) but add number at the end if filename already ex

Answer 1

Try something like this (untested, but you get the idea):

filename=$1

# If file doesn't exist, create it
if [[ ! -f $filename ]]; then
    touch $filename
    echo "Created \"$filename\""
    exit 0
fi

# If file already exists, find a similar filename that is not yet taken
digit=1
while true; do
    temp_name=$filename-$digit
    if [[ ! -f $temp_name ]]; then
        touch $temp_name
        echo "Created \"$temp_name\""
        exit 0
    fi
    digit=$(($digit + 1))
done

Depending on what you're doing, replace the calls to touch with whatever code is needed to create the files that you are working with.