linux安装两个mysql(8.0和5.7),并同时使用方式

tar -xvf mysql-5.7.30-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.30-linux-glibc2.12-x86_64.tar.gz /usr/local/mysql5.7

chown mysql:mysql /usr/local/mysql -R

vim my.cnf

# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

[mysqld]
skip-grant-tables
#mysql安装目录
basedir=/usr/local/mysql5.7
#mysql数据库目录
datadir=/usr/local/mysql5.7/data

port = 3307

[mysqld_safe]
#错误日志
log-error=/usr/local/mysql5.7/data/error.log
#pid文件
pid-file=/usr/local/mysql5.7/data/mysqld.pid
tmpdir=/tmp/mysql5.7
#
# include all files from the config directory
#
#!includedir /etc/my.cnf.d

/usr/local/mysql5.7/bin/mysqld --initialize-insecure --datadir=/usr/local/mysql5.7/data/ --basedir=/usr/local/mysql5.7/ --user=mysql

vim /usr/local/mysql5.7/support-files/mysql.server

basedir=/usr/local/mysql5.7
datadir=/usr/local/mysql5.7/data
lockdir='/var/lock/subsys5.7'
lock_file_path="$lockdir/mysql5.7"
mysqld_pid_file_path=/usr/local/mysql5.7/data/mysqld.pid
#搜索conf后再修改，这个在else语句里面
conf=/usr/local/mysql5.7/my.cnf

cp -i /usr/local/mysql5.7/support-files/mysql.server /etc/init.d/mysql5.7

service mysql5.7 {start|stop|restart|reload|force-reload|status}

service mysql5.7 start