Find an Ed25519 SSH key with a desired suffix

vanity_ssh.sh

#!/bin/bash
suffix="*test" # set your suffix
comment="set-your-comment" # could be your email
while true; do
    rm -f newkey newkey.pub
    ssh-keygen -t ed25519 -f ./newkey -C $comment -N '' >>/dev/null
    shopt -s nocasematch
    if [[ $(awk '{print $2}' newkey.pub) == $suffix ]]; then
        echo "YAY! Found a key with suffix $suffix"
        cat newkey.pub
        break
    fi
done

# set password for key
# ssh-keygen -p -f newkey