CentOS卸载自带的mysql

先rpm -qa | grep mysql
查看所有与 mysql相关联的依赖

然后使用 yum remove XXXXX相应的依赖

----------------------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------
安装新的mysql
方法一：
#yum -y install mysql-server
安装完了后，启动服务
/etc/rc.d/init.d/mysqld start
更改密码
/usr/bin/mysqladmin   -u   root  password  "new-password";

------------------------------------------------------------------------------------------------------------------------------------------------------------------------
方法二。
#yum -y install cmake
# yum -y install gcc-c++

yum install -y ncurses-devel bison

wget  http://mysql./Downloads/MySQL-5.5/mysql-5.5.19.tar.gz

wget http://www./files/v2.8/cmake-2.8.6.tar.gz

 

groupadd mysql

useradd mysql -g mysql -M -s /sbin/nologin

mkdir -p /usr/local/mysql/data

mkdir -p /usr/local/mysql/log

chmod +w /usr/local/mysql

tar zxvf cmake-2.8.6.tar.gz

tar zxvf mysql-5.5.19.tar.gz

cd cmake-2.8.6

./bootstrap

gmake

gmake install

 

cd ../mysql-5.5.19

cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_UNIX_ADDR=/tmp/mysql.sock -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DWITH_EXTRA_CHARSETS:STRING=utf8,gbk -DWITH_MYISAM_STORAGE_ENGINE=1 -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_MEMORY_STORAGE_ENGINE=1 -DWITH_READLINE=1 -DENABLED_LOCAL_INFILE=1 -DMYSQL_DATADIR=/usr/local/mysql/data -DMYSQL_USER=mysql -DWITH_DEBUG=0

make

make install

 

cp support-files/mysql.server /etc/init.d/mysqld

chmod +x /etc/init.d/mysqld

chown -R mysql:mysql /usr/local/mysql

ln -s /usr/local/mysql/lib/libmysqlclient.so.16 /usr/lib/libmysqlclient.so.16

ln -s /usr/local/mysql/bin/mysql /sbin/mysql

ln -s /usr/local/mysql/bin/mysqladmin /sbin/mysqladmin

ln -s /usr/local/mysql/bin/mysqldump /sbin/mysqldump

cp support-files/my-huge.cnf /etc/my.cnf -f

 

/usr/local/mysql/scripts/mysql_install_db --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --user=mysql

chkconfig --add mysqld

chkconfig --level 2345 mysqld on

service mysqld start

mysqladmin -u root password "yourpasswd"

mysql -u root -p