FAQ on Web Server Cloud

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You can use the UNIX command "passwd" to change password.

You can change the password of MySQL account using one of the following ways:

(a) connect to your MySQL account at 'localhost':

step 1a: start up MySQL:
      /usr/bin/mysql -u -p

step 2a: change your MySQL account password at 'localhost':
      MySQL> set password for <mysql_accountname>=password('newpassword');

step 3a: disconnect from MySQL:
      MySQL> quit;

(b) connect from another system from HKU network to the computer 'www.<domainname>.hku.hk (mysql access is available from HKU network only):

step 1b: start up MySQL:
      /usr/bin/mysql -u <mysql_accountname> -p -h www.<domainname>.hku.hk

step 2b: change your MySQL account password at 'www.<domainname>.hku.hk' :
      MySQL> set password for <mysql_accountname>=password('newpassword');

step 3b : disconnect from MySQL :
      MySQL> quit;

If you are the webmaster of your department, you can use the command "restart_webserver" to restart the webserver.

If you are the webmaster of your department, you can use the command "restart_database" to restart the database.

You may use any file transfer program that supports SFTP (e.g. coreFTP and WS_FTP Home/Professional) to upload the web content with the following information:

Host Name: www.<domainname>.hku.hk
User ID: <UID> (account name of web server cloud)
Password: <password> (password of web server cloud)
Site Folder: /home/<UID>/html/ (web content location of web server cloud)

You can verify the result with the following URL:
The URL for webmaster account: http://www.<domainname>.hku.hk
The URL for normal user account: http://www.<domainname>.hku.hk/<UID>

Type the command under /usr/share/tomcat5/webapps
$ create_webapps context owner_account

This will create the webapps named "context" owned by the user account "owner" under /usr/share/tomcat5/webapps.

Re-start the tomcat server to make the change effective [If necessary, you may also change the file permission of some files such that they are writable by the group “tomcat” (you are a member of the group tomcat)]:

$ restart_tomcat

Please note that some of the files/folders are writable by your account for future maintenance or addition of libraries needed by users, e.g., the Tomcat shared library folder under /usr/share/tomcat5/shared/lib and some of the Tomcat XML configuration files under /etc/tomcat5/.

Once the Tomcat is ready, you have to map the Tomcat context to the Apache web server using the proxy_ajp module. Please update the file "/etc/httpd/conf.d/proxy_ajp.conf" to map the URL to Tomcat by adding the line (pls refer to the example in this configuration file):
ProxyPass /path_to_context/ ajp://localhost:8009/context/

such that the tomcat application can be accessed through the URL http://www.<domainname>.hku.hk/path_to_context/ after restarting the web server.

Restart the web server to make the change in Q8. effective:

$ restart_webserver

Type the following command under /usr/share/tomcat5/webapps:
$ rm_webapps context
The folder /usr/share/tomcat5/webapps/context will then be deleted upon confirmation.

Type the command
$ change_user_password <user account>