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=Katherine Masseau=
1. Show SQL commands that work on MySQL for:
*give and remove user rights:
To give a user 'select' privileges on all databases, you might use:
"grant select on *.* to user@localhost identified by 'password';"
*create a table
To create a table holding people along with their locations, you might use:
"create table people.addresses (id INT, name VARCHAR(100), city VARCHAR(100), country VARCHAR(100) );"
*insert a few records into the table you created
To insert some records into the table created above, you might use:
"insert into people (id,name,city,country) values (0,'Katherine Masseau','Toronto','Canada');
insert into people (id,name,city,country) values (0,'Mark Fernandes','Toronto','Canada');"
*select some of the records in the table you created
To select records from this table, you might use:
"select * from people where city = 'Toronto';"
*change some of the records into the table you created
To change some records in this table, you might use:
"update people SET city='North York' where name='Katherine Masseau';"
*delete records from the table you created
To delete the records in this table, you might use:
"delete from people where city = 'Toronto';"
2. How will you read records from in a plain text file into MySQL. Give an example.
If you have dumped the records from one database into a text file, and want to import them, you could use:
"mysql -p -h localhost mydatabase < mydump.sql"
3. What are the exact sequence of steps that you need to take so that Apache logs can be read in from MySQL. Assume you have a default installation of Apache and a default installation of MySQL.
I tried to do this, but installing mod_log_sql failed with the following error sequence, which I was unable to resolve in time to submit the lab:
'/usr/local/build-1/libtool --silent --mode=compile cc -prefer-pic -O2 -fno-strict-aliasing -pipe -I/usr/include -I/usr/local/include -
I/usr/local/include/apache22 -I/usr/local/include/apr-1 -I/usr/local/include/apr-1 -I/usr/local/include -O2 -Wall -I/usr/local/include/mysql -DEAPI -c -o
mod_log_sql.lo mod_log_sql.c && touch mod_log_sql.slo
mod_log_sql.c:78: error: expected specifier-qualifier-list before 'array_header'
...'
4. Name two security measures that MySQL recommmends
Disable TCP networking: If the database is only accessed from the local machine, disabling TCP networking can mitigate the possibility of the database being exploited remotely. To do this, you must edit the 'mysqld_safe' script. Find the line:
'--skip-locking >> $err_log 2>&1'
and replace it with:
'--skip-networking --skip-locking >> $err_log 2>&1'
Then, find the line:
'--skip-locking "$@" >> $err_log 2>&1'
and replace it with:
'--skip-networking --skip-locking "$@" >> $err_log 2>&1'
Now, restart your MySQL server so the change takes effect.
Remove default users and tables: By default mysql includes two default users which are able to connect to the database without a password. As this is an obvious security weakness, remove them, along with the default 'test' databse, using:
"DELETE FROM user WHERE User = '';
DELETE FROM db WHERE Host = '%';"
5. Which MySQL log file, in your opinion, is important for you to keep track of and why?
Probably the file located at '/var/db/mysql/hostname.err', as it will contain records of errors that you can make use of in debugging your database configuration.
6. As you observe from the tutorials, many users have added their own comments in addition to the MySQL material. Which two comments (one from the using tutorial and one from the administration tutorial) you think were useful to you.
I performed this lab from memory based on my previous experiences with MySQL, and am thus unable to judge the comments to which you refer.
=Mohak=
* View privileges for a user:
This should also be enabled from the server side too.
* What are the exact sequence of steps that you need to take so that Apache logs can be read in from MySQL:
Install mod_log_sql module and issue following commands.
mysqladmin CREATE apache_logs
mysql apache_logs < access_logs.sql
mysql alache_logs
GRANT INSERT,CREATE ON apache_logs.* TO 'root'@'localhost' IDENTIFIED BY 'password';
Add following lines to httpd.conf:
<IfModule mod_log_sql.c>
LogSQLLoginInfo mysql://webserver:password@mysqldb.example.com/apache_logs
LofSQLCreateTables on
</IfModule>
* Name two security measures that MySQL recommends:
Some general security measures recommended my MySQL are as follows:
In general mysql emphasize on protecting the entire system against all attacks. mysql also emphasizes on not giving any one else except root, access to the tables in the mysql database.
* Which MySQL log file, in your opinion, is important for you to keep track of and why ?
useful when there is an error in a client and you want to find out exactly what client sent to mysql daemon. It can enables using
--general_log and 1 or 0 to enable and disable respectively.
* As you observe from the tutorials, many users have added their own comments in addition to the MySQL material. Which two comments you think were useful to you.
Users comments on how to use LOAD DATA LOCAL INFILE and the security concerns with it were helpful to me.
= Milton =
A lot of experience sharing
http://dev.mysql.com/doc/refman/5.0/en/query-log.html.
=Kezhong Liang=
In my opinion, I think the General Query Log is important for us to keep track. It records the information of each client creating connection and close with timestamps. It even records the situation of each client query. It contains more detail information than others.
=Varinder Singh=
'''Security Measure'''
#Use MySQL's internal SSL support to make the connection even more secure.Alternatively, use SSH to get an encrypted TCP/IP connection between a MySQL server and a MySQL client.
'''To make a MySQL system secure, you should strongly consider the following suggestions:'''
Require all MySQL accounts to have a password. A client program does not necessarily know
the identity of the person running it. It is common for client/server applications that the user
can specify any user name to the client program. For example, anyone can use the mysql program
to connect as any other person simply by invoking it as mysql -u other_user db_name if other_user
has no password. If all accounts have a password, connecting using another user's account becomes much more difficult.
Never run the MySQL server as the Unix root user. This is extremely dangerous, because any user with the FILE privilege is able to cause the server to create files as root (for example, ~root/.bashrc). To prevent this, mysqld refuses to run as root unless that is specified explicitly using the --user=root option.
