MySQL启动时必需到usr/local/mysql目录的问题解决方法

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# If you install MySQL on some other places than /usr/local/mysql, then you　　# have to do one of the following things for this script to work:
　　#
　　# - Run this script from within the MySQL installation directory
　　# - Create a /etc/my.cnf file with the following information:
　　#   [mysqld]
　　#   basedir=
　　# - Add the above to any other configuration file (for example ~/.my.ini)
　　#   and copy my_print_defaults to /usr/bin
　　# - Add the path to the mysql-installation-directory to the basedir variable
　　#   below.
　　#
　　# If you want to affect other MySQL variables, you should make your changes
　　# in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files.
　　# If you change base dir, you must also change datadir. These may get
　　# overwritten by settings in the MySQL configuration files.
　　basedir=
　　datadir=
　　# The following variables are only set for letting mysql.server find things.
　　# Set some defaults
　　mysqld_pid_file_path=
　　if test -z "$basedir"
　　then
　　basedir=/usr/local/mysql
　　bindir=/usr/local/mysql/bin
　　if test -z "$datadir"
　　then
　　datadir=/usr/local/mysql/data
　　fi
　　sbindir=/usr/local/mysql/bin
　　libexecdir=/usr/local/mysql/bin
　　else
　　bindir="$basedir/bin"
　　if test -z "$datadir"
　　then
　　datadir="$basedir/data"
　　fi
　　sbindir="$basedir/sbin"
　　libexecdir="$basedir/libexec"
　　fi