Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
ejemplo hago esta copia de las base de datos
cd / tar czvf db.tar.gz /var/db/mysql
y para que sirve el otro comando
cd / tar xzvf ?