Shell Script para crear un usuario de Mysql (forma interactiva)

En este tutorial, mostraré cómo escribir un script de shell para crear un usuario de MySQL. El script también otorgará privilegios relevantes para el usuario para la base de datos especificada.

Script de shell para agregar usuario mysql

#!/bin/bash

#Ask user to enter database name and save input to dbname variable
read -p "Please Enter Database Name:" dbname

#checking if database exist
mysql -Bse "USE $dbname" 2> /dev/null

#if database exist:
if [ $? -eq 0 ]; then

#ask user about username
read -p "Please enter the username you wish to create : " username

#ask user about allowed hostname
read -p "Please Enter Host To Allow Access Eg: %,ip or hostname : " host

#ask user about password
read -p "Please Enter the Password for New User ($username) : " password

#mysql query that will create new user, grant privileges on database with entered password
query="GRANT ALL PRIVILEGES ON $dbname.* TO $username@'$host' IDENTIFIED BY '$password'";

#ask user to confirm all entered data
read -p "Executing Query : $query , Please Confirm (y/n) : " confirm

#if user confims then
if [ "$confirm" == 'y' ]; then

#run query
mysql -e "$query"

#update privileges, without this new user will be created but not active
mysql -e "flush privileges"

else

#if user didn't confirm entered data
read -p "Aborted, Press any key to continue.."

#just exit
fi

else

#If database not exit – warn user and exit
echo "The Database: $dbname does not exist, please specify a database that exists";

fi

Ejecución de un script de shell

Server1:/# ./mysql_create_user.sh

Please Enter Database Name:test

Please enter the username you wish to create : test

Please Enter Host To Allow Access Eg: %,ip or hostname : localhost

Please Enter the Password for New User (test) : 12321q

Executing Query : GRANT ALL PRIVILEGES ON test.* TO test@'localhost' IDENTIFIED BY '12321q' , Please Confirm (y/n) : y

Prueba de usuario de mysql

Server1:/# mysql -u test -p12321q

Welcome to the MySQL monitor. Commands end with ; or g.

Your MySQL connection id is 54

Server version: 5.1.66-0+squeeze1 (Debian)

Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> Bye