This Bash script generates a highly secure Ed25519 SSH key

ssh-keygen.sh

#!/bin/bash

RD=$(echo "\033[01;31m")
YW=$(echo "\033[33m")
GN=$(echo "\033[1;92m")
CL=$(echo "\033[m")
BFR="\\r\\033[K"
HOLD="${YW}+${CL}"
CM="${GN}✓${CL}"
CROSS="${RD}✗${CL}"

msg_ok() {
local msg="$1"
echo -e "${BFR} ${CM} ${GN}${msg}${CL}"
}
msg_error() {
local msg="$1"
echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
}
msg_info() {
local msg="$1"
echo -e " ${HOLD} ${YW}${msg}${CL}"
}

slugify() {
	# 1. Take input string
	local input="${1}"
	# 2. Transliterate UTF-8 characters to ASCII (e.g., 'é' becomes 'e')
	local slug
	slug=$(echo "$input" | iconv -t ascii//TRANSLIT)
	# 3. Replace non-alphanumeric characters with hyphens
	slug=$(echo "$slug" | sed -E 's/[^[:alnum:]]+/-/g')
	# 4. Strip leading and trailing hyphens
	slug=$(echo "$slug" | sed -E 's/^-+|-+$//g')
	# 5. Convert to lowercase
	#slug=$(echo "$slug" | tr '[:upper:]' '[:lower:]')
	echo "$slug"
}

echo
msg_info "--------------------------------------------"
msg_info "--- SSH Ed25519 Key Pair Generator Start ---"
msg_info "--------------------------------------------"
echo

# Ed25519 key pair
function Ed25519keypair() {
echo
echo -e "\033[0;41m Generate Ed25519 key pair \033[m"
echo
echo -n "Enter the name for Ed25519 key: "
read keyname
if [[ -n $keyname ]]; then
keyname=$(slugify "$keyname")
ssh-keygen -o -a 64 -t ed25519 -f id_ed25519_$keyname -C "$keyname" -N "" -q
echo
msg_ok "Ed25519 key pair setup done!"
else
msg_error "No response received!"
fi
sleep 1
}

printf 'Generate new Ed25519 key pair [y/N]? '
read answer
if [ "$answer" != "${answer#[Yy]}" ] ;then
Ed25519keypair
fi

echo
echo "---------------------------------------------------"
echo "Your Ed25519 public key is:"
cat "id_ed25519_${keyname}.pub"
echo "---------------------------------------------------"
echo
msg_info "--------------------------------------------"
msg_info "--- SSH Ed25519 Key Pair Generator End  ----"
msg_info "--------------------------------------------"
echo
exit 0

Now to generate a new ED25519 key pair run bash ssh-keygen.sh in your terminal