Difference between revisions of "Dept. MySQL Server"
 
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You will need a [[Obtaining CS MySQL Accounts|CS '''''MySQL''''' account]] for access.   
 
You will need a [[Obtaining CS MySQL Accounts|CS '''''MySQL''''' account]] for access.   
  
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:('''Note:''' ''[https://support.cs.jhu.edu/wiki/Dr_Yarowskys_MySQL_Class_Dbase_Service Dr. Yarowsky's Database Class''] uses a completely different MySQL server, ''dbase.cs.jhu.edu.''    If you are taking his class, you will need to get account info from your TA.)
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Please read the following '''Notes'''...
  
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Once you have a CS '''''MySQL''''' account, you can connect to the server with:
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{{messagebox|'''Note 1:''' The ''[[CS_Database_Class_(315/415/615)_Information|315/415/615 Databases courses]]'' use a completely different MySQL server called ''dbase.cs.jhu.edu.''   If you are taking the Databases class, you will need to get account info and instructions from your TA.|type=info}}
  
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:<code> mysql -u ''your-mysql-username'' -p -h mysql.cs.jhu.edu
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{{messagebox|'''Note 2:''' Only those with [[Obtaining_CS_Computer_Accounts|CS Linux accounts]] will be able to apply for a [[Obtaining_CS_MySQL_Accounts|MySQL account]] for our '''mysql.cs.jhu.edu''' server.|type=info}}
  
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You will be prompted for your MySQL password.
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{{messagebox|'''Note 3:'''  You cannot ''ssh'' into mysql.cs.jhu.edu.  You must connect to the MySQL server using MySQL commands or a MySQL client program, using the MySQL account we would provide you.|type=info}}
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{{messagebox|'''Note 4:'''  When your MySQL account is created, you will receive a database whose name is ''the same as'' your MySQL account.|type=info}}
  
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=='''UPDATE:''' Users of our CS MySQL service must change their MySQL passwords by Dec 31, 2019... ==
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{{messagebox|'''Note 5:''' Later, if you need an ''additional'' database set up at some point for your MySQL account, send an email to {{mailto|support}} letting us know your MySQL username and the ''proposed name'' of your database.|type=info}}
  
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Several of you utilize our MySQL services by accessing our MySQL server, mysql.cs.jhu.edu.  We will soon be upgrading to a later version of MySQL, and that version handles its password storage format differently than in the past.
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==Connecting to our MySQL server==
  
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In preparation for the upgrade to the database server software on mysql.cs.jhu.edu, we need everyone with a MySQL account on that server to change their MySQL passwords (not their Linux passwords to our servers in general... only change your MySQL password '''if you specifically use our mysql.cs.jhu.edu MySQL server'''.)
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Once you have your CS Department '''''MySQL''''' account, you can connect to the '''mysql.cs.jhu.edu''' server with:
  
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To make that change, connect to mysql.cs.jhu.edu with a MySQL client, and run the following command:
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<kbd>mysql -u <var>your-mysql-username</var> -p -h mysql.cs.jhu.edu</kbd>
  
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    SET PASSWORD = PASSWORD('your-new-password');
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You will be prompted for your MySQL password.
  
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Replace ''your-new-password'' with what you want your password to be.
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The MySQL server is only accessible from the JHU networks or VPN.
  
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Please be aware that many MySQL clients keep a record of SQL queries.  You should clear that record to keep your MySQL password safe.  On Linux systems, the command line MySQL client keeps its statement log in ~/.mysql_history; we recommend removing that file after changing your MySQL password.  Other clients may store their history in other places.
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== Changing Your MySQL Password ==
  
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Please plan to change your MySQL password by December 31st, 2019.  After that date, anyone with an unchanged MySQL password might not be able to log into the MySQL system.  If you're not able to log in, you'll have to visit the CS IT Support team in-person to have us reset your MySQL password for you.
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MySQL passwords are separate from the passwords for our [[:Category:Linux Clients|Linux clients]]; changing your Linux password will not change your MySQL password (and vice versa).
  
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:'''NOTE:'''  This password change '''does not''' affect current students using our dbase.cs.jhu.edu MySQL server for Dr. Yarowsky's course.
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To change your MySQL password, connect to mysql.cs.jhu.edu with a MySQL client, and run the following command:
  
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Any questions should be directed to [mailto:support@cs.jhu.edu support@cs.jhu.edu]
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SET PASSWORD = PASSWORD('your-new-password');
  
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Replace ''your-new-password'' with what you want your password to be.
  
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Please be aware that many MySQL clients keep a record of SQL queries.  You should clear that record to keep your MySQL password safe.  On Linux systems, the command line MySQL client keeps its statement log in ~/.mysql_history; we recommend removing that file after changing your MySQL password.  Other clients may store their history in other places.
  
 
[[Category:MySQL]]
 
[[Category:MySQL]]

Latest revision as of 12:55, 10 September 2024

The CS Dept has a MySQL server available. Point your MySQL client to mysql.cs.jhu.edu

You will need a CS MySQL account for access.

Please read the following Notes...

Note 1: The 315/415/615 Databases courses use a completely different MySQL server called dbase.cs.jhu.edu. If you are taking the Databases class, you will need to get account info and instructions from your TA.

Note 2: Only those with CS Linux accounts will be able to apply for a MySQL account for our mysql.cs.jhu.edu server.

Note 3: You cannot ssh into mysql.cs.jhu.edu. You must connect to the MySQL server using MySQL commands or a MySQL client program, using the MySQL account we would provide you.

Note 4: When your MySQL account is created, you will receive a database whose name is the same as your MySQL account.

Note 5: Later, if you need an additional database set up at some point for your MySQL account, send an email to support@cs.jhu.edu letting us know your MySQL username and the proposed name of your database.

Connecting to our MySQL server

Once you have your CS Department MySQL account, you can connect to the mysql.cs.jhu.edu server with: 

mysql -u your-mysql-username -p -h mysql.cs.jhu.edu

You will be prompted for your MySQL password.

The MySQL server is only accessible from the JHU networks or VPN.

Changing Your MySQL Password

MySQL passwords are separate from the passwords for our Linux clients; changing your Linux password will not change your MySQL password (and vice versa).

To change your MySQL password, connect to mysql.cs.jhu.edu with a MySQL client, and run the following command: 

SET PASSWORD = PASSWORD('your-new-password');

Replace your-new-password with what you want your password to be.

Please be aware that many MySQL clients keep a record of SQL queries. You should clear that record to keep your MySQL password safe. On Linux systems, the command line MySQL client keeps its statement log in ~/.mysql_history; we recommend removing that file after changing your MySQL password. Other clients may store their history in other places.