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1. Show SQL commands that work on MySQL for:
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,'
Gregory 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='
*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.slomod_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?
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.