Ubuntu下MySQL解压安装

1.Ubuntu下解压到/usr/local/mysql 
groupadd mysql 
useradd -g mysql mysql 
cd /usr/local/mysql 
chown -R mysql . 
chgrp -R mysql . 
chown -R root . 
chown -R mysql data 
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld 
cp /usr/local/mysql/support-files/my-huge.cnf /etc/my.cnf

2.修改my.cnf 
nano /etc/my.cnf 
添加 
basedir=/usr/local/mysql 
datadir=/home/mysql

3.初始化数据库 
scripts/mysql_install_db --user=mysql

4.启动 
bin/mysqld_safe --user=mysql & 
修改密码 
mysql>use mysql 
mysql>UPDATE user SET password=PASSWORD('root') WHERE user='root'; 
mysql>FLUSH PRIVILEGES; 
mysql>exit

5.设置自动启动 
apt-get install chkconfig 
chkconfig --add mysqld 
chkconfig mysqld on

6.将mysql加入到path 
nano /etc/profile 
umask前加进这句 
export PATH=$PATH:/usr/local/mysql/bin

7.重启系统 
reboot