1.解压安装包：

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tar -zxvf MySQL-5.7.23-linux-glibc2.12-x86_64.tar.gz

创建mysql目录：

mkdir -p /data/mysql
cd /data/mysql/

binlog存储目录：

mkdir binlog

mysql数据目录：

mkdir data

mysql日志目录：

mkdir log

限制mysql导入导出目录：

mkdir tmp

授权mysql用户：

chown -R mysql:mysql /data/mysql/

移动目录到自定义的位置，这里存放位置为/usr/local下：

mv mysql-5.7.23-linux-glibc2.12-x86_64 /usr/local/mysql

cd /usr/local/

程序目录授权：

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

备份自带的配置文件：

cp my.cnf my.cnf.back

编辑新的配置文件：

vi my.cnf

将以下内容替换源文件的内容

[mysqld]
#bind-address 0.0.0.0
back_log = 2000
basedir = /usr/local/mysql
character-set-server = utf8mb4
datadir = /data/mysql/data
event_scheduler = ON
innodb_autoinc_lock_mode = 1
innodb_buffer_pool_size = 16G
innodb_data_file_path = ibdata1:500M:autoextend
innodb_data_home_dir = /data/mysql/data
innodb_file_per_table = 1
innodb_flush_log_at_trx_commit = 2
innodb_flush_method = O_DIRECT
innodb_io_capacity = 2000
innodb_log_buffer_size = 8388608
innodb_log_files_in_group = 3
innodb_log_group_home_dir = /data/mysql/data
innodb_max_dirty_pages_pct = 50
innodb_open_files = 1024
innodb_read_io_threads = 8
innodb_thread_concurrency = 20
innodb_write_io_threads = 8
innodb_lock_wait_timeout = 10
innodb_buffer_pool_load_at_startup = 1
innodb_buffer_pool_dump_at_shutdown = 1
key_buffer_size = 3221225472
innodb_log_file_size = 1G
local_infile = 1
slave-skip-errors = 1062 1032
binlog-format = row
log-bin = /data/mysql/binlog/mysql-bin.log
expire_logs_days = 7

log_bin_trust_function_creators = 1
log_output = FILE
long_query_time = 1
log-error = /data/mysql/log/error.log
max_allowed_packet = 134217728
max_connect_errors = 1000000
max_connections = 2000
myisam_sort_buffer_size = 33554432
#myisam_recover = 1
join_buffer_size = 8388608
tmp_table_size = 33554432
net_buffer_length = 8192
performance_schema = 1
performance_schema_max_table_instances = 200
pid-file = /data/mysql/mysqld.pid
port = 3306
query_cache_size = 0
query_cache_type = 0
read_buffer_size = 20971520
read_rnd_buffer_size = 16M
max_heap_table_size = 33554432
bulk_insert_buffer_size = 134217728
#relay-log = /data2/mysql/log/mysql-relay.log
secure-file-priv = /data/mysql/tmp
server-id = 324532432
skip-slave-start
skip_name_resolve
slave-load-tmpdir = /data/mysql/tmp
slow-query-log-file = /data/mysql/log/mysql-slow.log
slow_query_log = 1
socket = /tmp/mysql.sock
sort_buffer_size = 2097152

table_open_cache = 128
thread_cache_size = 50
tmpdir = /data/mysql/tmp
user = mysql
#wait_timeout = 2880000
transaction_isolation=read-committed
long_query_time=1
sync_binlog=0
innodb_flush_log_at_trx_commit=0
[mysqld_safe]
log-error = /data/mysql/log/error.log
pid-file = /data/mysql/mysqld.pid

保存退出

cd /usr/local/mysql/

初始化数据库：

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

cd /data/mysql/log/

查看日志，初始化会生成初始密码：

tail -f error.log

拷贝启动脚本到系统启动目录：

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

加入开机启动服务：

chkconfig --add mysql

设置开机启动：

chkconfig mysql on

拷贝命令到系统路径下，便于全局调用：

cp /usr/local/mysql/bin/* /usr/local/sbin/

/etc/init.d/mysql start ##启动数据库

登录到数据库内修改root用户的初始化密码：

mysql -u root -p --->输入mysql数据库root用户的密码
SET PASSWORD = PASSWORD('新密码'); ##修改root用户的密码。（alter user user() identified by '新密码';）

到这里整个初始化过程就完成了。

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