補寫mysql安裝

補寫：

shell> groupadd mysql
shell> useradd -r -g mysql mysql
shell> cd /usr/local
shell> tar zxvf /path/to/mysql-VERSION-OS.tar.gz
shell> ln -s full-path-to-mysql-VERSION-OS mysql
shell> cd mysql
shell> chown -R mysql .
shell> chgrp -R mysql .
shell> scripts/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql data
# Next command is optional
shell> cp support-files/my-medium.cnf /etc/my.cnf
shell> bin/mysqld_safe --user=mysql &
# Next command is optional
shell> cp support-files/mysql.server /etc/init.d/mysql.server

能夠直接經過server啓動

通常我喜歡給data分區給很大，因此但願可以吧數據存放在data下

建文件夾mysql

#mkdir /data/mysql

將/usr/local/mysql/data目錄下文件複製進/data/mysql

在/usr/local/mysql下建目錄var

建連接

#ln -s /data/mysql var

更改/etc/init.d/mysql.server，將datadir路徑改成/usr/local/mysql/var

直接server mysql.server start啓動，查看進程，能夠看到datadir已經更改成/usr/local/mysql/var

若經過mysqld_safe，沒有用參數啓動，datadir路徑依然爲/usr/local/mysql/data

進去更改mysqld_safe的默認參數

更改/etc/my.cnf

再利用mysqld_safe啓動，數據庫存放路徑更改成/usr/local/mysql/var