#! /bin/bash

TIMESTAMP=$(date +"%F")
BACKUP_DIR="/path/to/dir"
MYSQL_USER="root"
MYSQL=/usr/bin/mysql
MYSQL_PASSWORD="rootpassorsomething"
MYSQLDUMP=/usr/bin/mysqldump
HOST='server.host'

mkdir -p "$BACKUP_DIR"

databases=`$MYSQL --host $HOST --user=$MYSQL_USER -p$MYSQL_PASSWORD -e "SHOW DATABASES;" | grep -Ev "(Database|information_schema|performance_schema)"`

for db in $databases; do
  $MYSQLDUMP --host $HOST --force --opt --user=$MYSQL_USER --password=$MYSQL_PASSWORD --databases $db | gzip > "$BACKUP_DIR/$db.gz"
done