需要有网
yum -y install jemalloc openssl-devel libaio
wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
rpm -qa | grep mysql
rpm -qa | grep mariadb
rpm -e --nodeps mysql
rpm -e --nodeps mariadb #如果上面筛选出包的话，在这里写包的名称删除即可
mkdir /home/fosafer
tar -xf mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
mv mysql-8.0.20-linux-glibc2.12-x86_64 /home/fosafer/mysql
groupadd mysql
useradd -r -g mysql -s /sbin/nologin mysql
mkdir -p /home/fosafer/mysql/data
mkdir -p /home/fosafer/mysql/logs
mkdir -p /home/fosafer/mysql/conf
mkdir -p /home/fosafer/mysql/status
chown -R mysql:mysql /home/fosafer/mysql/data/
chown -R mysql:mysql /home/fosafer/mysql/logs/
chown -R mysql:mysql /home/fosafer/mysql/status/
chmod -R 755 /home/fosafer/mysql/status/
chmod -R 755 /home/fosafer/mysql/data/
chmod -R 755 /home/fosafer/mysql/logs/
#编写配置文件
cat << EOF > /home/fosafer/mysql/conf/my.cnf
[mysqld]
port=3306
basedir=/home/fosafer/mysql
datadir=/home/fosafer/mysql/data
log-error=/home/fosafer/mysql/logs/error.log
socket=/home/fosafer/mysql/status/mysql.sock
user=mysql
default_authentication_plugin=mysql_native_password
skip_host_cache
skip-name-resolve=1
#skip-grant-tables
[client]
port=3306
socket=/home/fosafer/mysql/status/mysql.sock
EOF
#初始化数据库
/home/fosafer/mysql/bin/mysqld --defaults-file=/home/fosafer/mysql/conf/my.cnf --initialize --user=mysql
#获取初始密码
tail -1 /home/fosafer/mysql/logs/error.log | awk '{print $13}'
/home/fosafer/mysql/bin/mysqld_safe --defaults-file=/home/fosafer/mysql/conf/my.cnf &
netstat -ntpl | grep mysqld
#修改密码
/home/fosafer/mysql/bin/mysqladmin -uroot -p'V:cVV+>R7Kbg' -S /home/fosafer/mysql/status/mysql.sock password '123456'
#测试是否修改成功
/home/fosafer/mysql/bin/mysql -uroot -p123456 -S /home/fosafer/mysql/status/mysql.sock -e "show databases"
