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I'm trying to install MySQL on Ubuntu Natty without the password prompt. However, I keep getting prompted for a password at some stage after the main installation.

Also, when I do enter what I believe should be my password (mymysqlpass), it gives me an access denied notice. Then when the script terminates, I can login to mysql without a password i.e. mysql -uroot, which should not happen.

I'd appreciate some help in fixing this, below is my code.

Thanks in advance.

#This script installs mysql (latest build)
#Install MYSQL Server
export DEBIAN_FRONTEND=noninteractive 
debconf-set-selections <<< 'mysql-server-5.1 mysql-server/root_password password '$mysql_pass''
debconf-set-selections <<< 'mysql-server-5.1 mysql-server/root_password_again password '$mysql_pass''
apt-get -y install mysql-server
#Configure Password and Settings for Remote Access
cp /etc/mysql/my.cnf /etc/mysql/my.bak.cnf
ip=`ifconfig eth0 | grep "inet addr"| cut -d ":" -f2 | cut -d " " -f1` ; sed -i "s/\(bind-address[\t ]*\)=.*/\1= $ip/" /etc/mysql/my.cnf
mysql -uroot -e "UPDATE mysql.user SET Password=PASSWORD('"$mysql_pass"') WHERE User='root'; FLUSH PRIVILEGES;"
sleep 10
mysql -uroot -p$mysql_pass -e "GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '"$mysql_pass"'; FLUSH PRIVILEGES;"
service mysql restart
echo "MySQL Installation and Configuration is Complete."
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migrated from stackoverflow.com Nov 14 '11 at 19:20

This question came from our site for professional and enthusiast programmers.

I would be very dangerous! whay you need this? –  Pascal Fares Dec 17 '13 at 14:10
When you're provisioning virtual machines, for one thing. If you're really worried, I'm sure you could do something like create a random cryptographically secure password and have the script create a cron job to tell you the password at a time when there is little traffic and have the system airgapped at that time. Just be sure you're looking at the computer during the 5 seconds you give it before it disappears. –  trysis Mar 17 at 4:40

3 Answers 3

The following commands set the MySQL root password to strangehat when you install the mysql-server package.

echo mysql-server mysql-server/root_password password strangehat | sudo debconf-set-selections
echo mysql-server mysql-server/root_password_again password strangehat | sudo debconf-set-selections

Note that this creates a cleartext copy of your password in /var/cache/debconf/passwords.dat (which is normally only readable by root and the password will be deleted by the package management system after the successfull installation of the mysql-server package).

Now you can install mysql-server and the password prompt doesn't appear:

sudo apt-get install mysql-server
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Thanks. This worked for all MySQL versions. –  Pothi Jul 1 '12 at 10:52
sudo debconf-set-selections <<< 'mysql-server mysql-server/root_password password my_password'
sudo debconf-set-selections <<< 'mysql-server mysql-server/root_password_again password my_password'
sudo apt-get -y install mysql-server

this will install mysql without any intervention

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This might work to make it not prompt you:

export DEBIAN_FRONTEND=noninteractive

As for the script, I'd try putting the password in quotes:

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