基礎環境：CentOS release 5.4 (Final)，並且通過yum安裝的mysql-server；
data文件路徑從默認的/var/lib/mysql調整到/data/mysql，需修改以下幾個配置文件：
1，/etc/my.cnf
[mysqld]
datadir=/data/mysql
socket=/data/mysql/mysql.sock
2，/etc/init.d/mysqld
get_mysql_option mysqld datadir "/data/mysql"
datadir="$result"
get_mysql_option mysqld socket "$datadir/mysql.sock"
socketfile="$result"
3，/usr/bin/mysqld_safe
#
# Second, try to find the data directory
#
# Try where the binary installs put it
if test -d $MY_BASEDIR_VERSION/data/mysql
then
DATADIR=$MY_BASEDIR_VERSION/data
if test -z "$defaults" -a -r "$DATADIR/my.cnf"
then
defaults="--defaults-extra-file=$DATADIR/my.cnf"
fi
# Next try where the source installs put it
elif test -d $MY_BASEDIR_VERSION/var/mysql
then
DATADIR=$MY_BASEDIR_VERSION/var
# Or just give up and use our compiled-in default
else
DATADIR=/data/mysql
fi
4，ln -s /data/mysql/mysql.sock /var/lib/mysql/mysql.sock （鏈接）
重啓service即可。