I fixed your bash code you forgot to put double Quotes

#!/bin/bash


fecha=$(date +%H-%M-%S)
server=192.168.0.209


if [ "$1" == "ssh-key" ]; then

    ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa

    ssh-copy-id -i "$HOME/.ssh/id_rsa.pub backupsrv@$server"

    exit 0

elif [ "$1" == "gpg-key" ]; then

    gpg --batch --gen-key <<EOF
%no-protection
Key-Type: RSA
Key-Length: 2048
Subkey-Type: RSA
Subkey-Length: 2048
Name-Real: Your Name
Name-Email: educacionit@$HOSTNAME
Expire-Date: 0
%commit
EOF


gpg --export -a "educacionit@$HOSTNAME" > "educacionit.$HOSTNAME.asc"


scp educacionit."$HOSTNAME".asc backupsrv@$server:~/

ssh backupsrv@$server  gpg --import educacionit."$HOSTNAME".asc

exit 0

fi




mysqldump --all-databases > /var/backups/"${fecha}"_all-db.sql

gpg --detach-sign /var/backups/"${fecha}"_all-db.sql



# Crear directorio en el remoto.

ssh backupsrv@$server mkdir -p /home/backupsrv/"$HOSNTNAME"

rsync -a -v  -e "ssh -i ~/.ssh/id_rsa" /var/backups/  backupsrv@${server}:~/"$HOSTNAME"