[root@xiaoluo ~]# rpm -qa | grep mysql　　// 这个命令就会查看该操作系统上是否已经安装了mysql数据库

[root@xiaoluo ~]# rpm -e mysql　　// 普通删除模式
[root@xiaoluo ~]# rpm -e --nodeps mysql　　// 强力删除模式，如果使用上面命令删除时，提示有依赖的其它文件，则用该命令可以对其进行强力删除

[root@xiaoluo ~]# yum list | grep mysql

[root@xiaoluo ~]# yum install -y mysql-server mysql mysql-deve

[root@xiaoluo ~]# rpm -qi mysql-server

[root@xiaoluo ~]# service mysqld start初始化 MySQL 数据库： WARNING: The host 'xiaoluo' could not be looked up with resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !
Installing MySQL system tables...
OK
Filling help tables...
OKTo start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your systemPLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h xiaoluo password 'new-password'Alternatively you can run:
/usr/bin/mysql_secure_installationwhich will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.See the manual for more instructions.You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe &You can test the MySQL daemon with mysql-test-run.pl
cd /usr/mysql-test ; perl mysql-test-run.plPlease report any problems with the /usr/bin/mysqlbug script![确定]
正在启动 mysqld：                                            [确定]

[root@xiaoluo ~]# service mysqld restart
停止 mysqld：                                             [确定]
正在启动 mysqld：                                          [确定]

[root@xiaoluo ~]# chkconfig --list | grep mysqld
mysqld             0:关闭    1:关闭    2:关闭    3:关闭    4:关闭    5:关闭    6:关闭

[root@xiaoluo ~]# chkconfig mysqld on
[root@xiaoluo ~]# chkconfig --list | grep mysql
mysqld             0:关闭    1:关闭    2:启用    3:启用    4:启用    5:启用    6:关闭

/usr/bin/mysqladmin -u root password 'new-password'　　// 为root账号设置密码

[root@xiaoluo ~]# mysqladmin -u root password 'root'　　// 通过该命令给root账号设置密码为 root

[root@xiaoluo etc]# ls my.cnf
my.cnf
[root@xiaoluo etc]# cat my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

[root@xiaoluo ~]# cd /var/lib/mysql/
[root@xiaoluo mysql]# ls -l
总用量 20488
-rw-rw----. 1 mysql mysql 10485760 4月   6 22:01 ibdata1
-rw-rw----. 1 mysql mysql  5242880 4月   6 22:01 ib_logfile0
-rw-rw----. 1 mysql mysql  5242880 4月   6 21:59 ib_logfile1
drwx------. 2 mysql mysql     4096 4月   6 21:59 mysql　　// 这两个是mysql数据库安装时默认的两个数据库文件
srwxrwxrwx. 1 mysql mysql        0 4月   6 22:01 mysql.sock
drwx------. 2 mysql mysql     4096 4月   6 21:59 test　　// 这两个是mysql数据库安装时默认的两个数据库文件

创建一个我们自己的数据库：
mysql> create database xiaoluo;
Query OK, 1 row affected (0.00 sec)[root@xiaoluo mysql]# ls -l
总用量 20492
-rw-rw----. 1 mysql mysql 10485760 4月   6 22:01 ibdata1
-rw-rw----. 1 mysql mysql  5242880 4月   6 22:01 ib_logfile0
-rw-rw----. 1 mysql mysql  5242880 4月   6 21:59 ib_logfile1
drwx------. 2 mysql mysql     4096 4月   6 21:59 mysql
srwxrwxrwx. 1 mysql mysql        0 4月   6 22:01 mysql.sock
drwx------. 2 mysql mysql     4096 4月   6 21:59 test
drwx------. 2 mysql mysql     4096 4月   6 22:15 xiaoluo　　// 这个就是我们刚自己创建的xiaoluo数据库
[root@xiaoluo mysql]# cd xiaoluo/
[root@xiaoluo xiaoluo]# ls
db.opt

[root@xiaoluo xiaoluo]# cd
[root@xiaoluo ~]# cd /var/log
[root@xiaoluo log]# ls
amanda                cron           maillog-20130331   spice-vdagent.log
anaconda.ifcfg.log    cron-20130331  mcelog             spooler
anaconda.log          cups           messages           spooler-20130331
anaconda.program.log  dirsrv         messages-20130331  sssd
anaconda.storage.log  dmesg          mysqld.log         tallylog
anaconda.syslog       dmesg.old      ntpstats           tomcat6
anaconda.xlog         dracut.log     piranha            wpa_supplicant.log
anaconda.yum.log      gdm            pm-powersave.log   wtmp
audit                 httpd          ppp                Xorg.0.log
boot.log              ibacm.log      prelink            Xorg.0.log.old
btmp                  lastlog        sa                 Xorg.1.log
btmp-20130401         libvirt        samba              Xorg.2.log
cluster               luci           secure             Xorg.9.log
ConsoleKit            maillog        secure-20130331    yum.log