mysql 手动启动

./mysqld_safe  --user=mysql --basedir=/usr/local/mysql5.7 --datadir=/usr/local/mysql5.7/data &

mysqld_safe --user=mysql --basedir=/usr/local/mysql5.7 --datadir=/usr/local/mysql5.7/data --defaults-file=/etc/my.cnf
basedir=/usr/local/mysql5.7
datadir=/usr/local/mysql5.7/data