title: How to write the expect script to install mariadb?
body: <p>Environment: centos7 + mariadb5.5.64.<br>
  Let me show the installation info on screen when to run <code>mysql_secure_installation</code>.</p>
  
  <pre><code># mysql_secure_installation
  
  NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
        SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!
  
  In order to log into MariaDB to secure it, we'll need the current
  password for the root user.  If you've just installed MariaDB, and
  you haven't set the root password yet, the password will be blank,
  so you should just press enter here.
  
  Enter current password for root (enter for none): 
  OK, successfully used password, moving on...
  
  Setting the root password ensures that nobody can log into the MariaDB
  root user without the proper authorisation.
  
  Set root password? [Y/n] y
  New password: 
  Re-enter new password: 
  Password updated successfully!
  Reloading privilege tables..
   ... Success!
  
  
  By default, a MariaDB installation has an anonymous user, allowing anyone
  to log into MariaDB without having to have a user account created for
  them.  This is intended only for testing, and to make the installation
  go a bit smoother.  You should remove them before moving into a
  production environment.
  
  Remove anonymous users? [Y/n] y
   ... Success!
  
  Normally, root should only be allowed to connect from 'localhost'.  This
  ensures that someone cannot guess at the root password from the network.
  
  Disallow root login remotely? [Y/n] y
   ... Success!
  
  By default, MariaDB comes with a database named 'test' that anyone can
  access.  This is also intended only for testing, and should be removed
  before moving into a production environment.
  
  Remove test database and access to it? [Y/n] y
   - Dropping test database...
   ... Success!
   - Removing privileges on test database...
   ... Success!
  
  Reloading the privilege tables will ensure that all changes made so far
  will take effect immediately.
  
  Reload privilege tables now? [Y/n] y
   ... Success!
  
  Cleaning up...
  
  All done!  If you've completed all of the above steps, your MariaDB
  installation should now be secure.
  
  Thanks for using MariaDB!
  </code></pre>
  
  <p>I write an automation expect script to install mariadb.    </p>
  
  <pre><code>  vim secure.exp
    set timeout 60
    spawn mysql_secure_installation
    expect {
        "Enter current password for root (enter for none): " {send "\r";exp_continue}
        "Set root password? [Y/n] " {send "y\r";exp_continue}
        "New password:" {send "123456\r";exp_continue}
        "Re-enter new password:" {send "123456\r";exp_continue}
        "Remove anonymous users? [Y/n]" {send "y\r";exp_continue}
        "Disallow root login remotely? [Y/n]" {send "y\r";exp_continue}
        "Remove test database and access to it? [Y/n]" {send "y\r";exp_continue}
        "Reload privilege tables now? [Y/n]" {send "y\r";exp_continue}
    }
  </code></pre>
  
  <p>To execute <code>/usr/bin/expect secure.exp</code>, i come across the error:</p>
  
  <pre><code>spawn mysql_secure_installation
  invalid command name "Y/n"
      while executing
  "Y/n"
      invoked from within
  "expect {
            "Enter current password for root (enter for none): " {send "\r";exp_continue}
            "Set root password? [Y/n] " {send "y\r";exp..."
      (file "secure.exp" line 3)
  </code></pre>
  
  <p>It is no use to write as below:</p>
  
  <pre><code>  set timeout 60
    spawn mysql_secure_installation
    expect {
        "Enter current password for root (enter for none): " {send "\r";exp_continue}
        "Set root password? \\[Y/n] " {send "y\r";exp_continue}
        "New password:" {send "123456\r";exp_continue}
        "Re-enter new password:" {send "123456\r";exp_continue}
        "Remove anonymous users? \\[Y/n]" {send "y\r";exp_continue}
        "Disallow root login remotely? \\[Y/n]" {send "y\r";exp_continue}
        "Remove test database and access to it? \\[Y/n]" {send "y\r";exp_continue}
        "Reload privilege tables now? \\[Y/n]" {send "y\r";exp_continue}
    }
  </code></pre>
  
  <p>Same error:</p>
  
  <pre><code>invalid command name "Y/n"
      while executing
  "Y/n"
      invoked from within
  "expect {
        "Enter current password for root (enter for none): " {send "\r";exp_continue}
        "Set root password? \\[Y/n] " {send "y\r";exp_conti..."
      (file "secure.exp" line 3)
  </code></pre>
  
  <p>How to fix my exp script then?</p>