centos6.8已经安装了mysql，所以要卸载掉
查看命令 rpm -qa | grep mysql
注意：MySQL区分大小写 grep mysql 和grep MySQL 是不一样的！！
卸载命令 yum remomve mysql(刚才查看到的安装包)
全文用的是绝对路径，所以不要在乎[root@master mysql]
我用的是CentOs6系统，首先下载MySql安装包，如下：
MySQL-client-5.6.36-1.linux_glibc2.5.x86_64.rpm
MySQL-server-5.6.36-1.linux_glibc2.5.x86_64.rpm
百度云链接：mysql-5.6.36
密码：qdsi
这个包的默认解压路径是/usr/share/mysql
[root@master ~]# cd /usr/local/mysql/
[root@master mysql]# lsMySQL-client-5.6.36-1.linux_glibc2.5.x86_64.rpm
MySQL-server-5.6.36-1.linux_glibc2.5.x86_64.rpm
[root@master mysql]# rpm -ivh MySQL-server-5.6.36-1.linux_glibc2.5.x86_64.rpm //安装mysql-server
warning: MySQL-server-5.6.36-1.linux_glibc2.5.x86_64.rpm: Header V3 DSA/SHA1
Signature, key ID 5072e1f5: NOKEY
Preparing...
(100%########################################### [100%]
1:MySQL-server (
1%########################################### [100%]
2017-04-12 00:26:36 0 [Note] Ignoring --secure-file-priv value as server is running with --
bootstrap.
2017-04-12 00:26:36 0 [Note] /usr/sbin/mysqld (mysqld 5.6.36) starting as process 8502 ...
2017-04-12 00:26:36 8502 [Note] InnoDB: Using atomics to ref count buffer pool pages
2017-04-12 00:26:36 8502 [Note] InnoDB: The InnoDB memory heap is disabled
2017-04-12 00:26:36 8502 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-04-12 00:26:36 8502 [Note] InnoDB: Memory barrier is not used
2017-04-12 00:26:36 8502 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-04-12 00:26:36 8502 [Note] InnoDB: Using Linux native AIO
2017-04-12 00:26:36 8502 [Note] InnoDB: Not using CPU crc32 instructions
2017-04-12 00:26:36 8502 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2017-04-12 00:26:36 8502 [Note] InnoDB: Completed initialization of buffer pool
2017-04-12 00:26:36 8502 [Note] InnoDB: The first specified data file ./ibdata1 did not
exist: a new database to be created!
2017-04-12 00:26:36 8502 [Note] InnoDB: Setting file ./ibdata1 size to 12 MB
2017-04-12 00:26:36 8502 [Note] InnoDB: Database physically writes the file full: wait...
2017-04-12 00:26:37 8502 [Note] InnoDB: Setting log file ./ib_logfile101 size to 48 MB
2017-04-12 00:26:38 8502 [Note] InnoDB: Setting log file ./ib_logfile1 size to 48 MB
2017-04-12 00:26:39 8502 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0
2017-04-12 00:26:39 8502 [Warning] InnoDB: New log files created, LSN=45781
2017-04-12 00:26:39 8502 [Note] InnoDB: Doublewrite buffer not found: creating new
2017-04-12 00:26:39 8502 [Note] InnoDB: Doublewrite buffer created
2017-04-12 00:26:39 8502 [Note] InnoDB: 128 rollback segment(s) are active.
2017-04-12 00:26:39 8502 [Warning] InnoDB: Creating foreign key constraint system
tables.
2017-04-12 00:26:39 8502 [Note] InnoDB: Foreign key constraint system tables created
2017-04-12 00:26:39 8502 [Note] InnoDB: Creating tablespace and datafile system tables.
2017-04-12 00:26:39 8502 [Note] InnoDB: Tablespace and datafile system tables created.
2017-04-12 00:26:39 8502 [Note] InnoDB: Waiting for purge to start
2017-04-12 00:26:39 8502 [Note] InnoDB: 5.6.36 started; log sequence number 0
A random root password has been set. You will find it in '/root/.mysql_secret'.
2017-04-12 00:26:40 8502 [Warning] 'user' entry 'root@master' ignored in --skip-name-
resolve mode.
2017-04-12 00:26:40 8502 [Warning] 'proxies_priv' entry '@ root@master' ignored in --
skip-name-resolve mode.
2017-04-12 00:26:40 8502 [Note] Binlog end
2017-04-12 00:26:40 8502 [Note] InnoDB: FTS optimize thread exiting.
2017-04-12 00:26:40 8502 [Note] InnoDB: Starting shutdown...
2017-04-12 00:26:41 8502 [Note] InnoDB: Shutdown completed; log sequence number
1625977
2017-04-12 00:26:41 0 [Note] Ignoring --secure-file-priv value as server is running with --
bootstrap.
2017-04-12 00:26:41 0 [Note] /usr/sbin/mysqld (mysqld 5.6.36) starting as process 8524 ...
2017-04-12 00:26:41 8524 [Note] InnoDB: Using atomics to ref count buffer pool pages
2017-04-12 00:26:41 8524 [Note] InnoDB: The InnoDB memory heap is disabled
2017-04-12 00:26:41 8524 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-04-12 00:26:41 8524 [Note] InnoDB: Memory barrier is not used
2017-04-12 00:26:41 8524 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-04-12 00:26:41 8524 [Note] InnoDB: Using Linux native AIO
2017-04-12 00:26:41 8524 [Note] InnoDB: Not using CPU crc32 instructions
2017-04-12 00:26:41 8524 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2017-04-12 00:26:41 8524 [Note] InnoDB: Completed initialization of buffer pool
2017-04-12 00:26:41 8524 [Note] InnoDB: Highest supported file format is Barracuda.
2017-04-12 00:26:41 8524 [Note] InnoDB: 128 rollback segment(s) are active.
2017-04-12 00:26:41 8524 [Note] InnoDB: Waiting for purge to start
2017-04-12 00:26:42 8524 [Note] InnoDB: 5.6.36 started; log sequence number 1625977
2017-04-12 00:26:42 8524 [Note] Binlog end
2017-04-12 00:26:42 8524 [Note] InnoDB: FTS optimize thread exiting.
2017-04-12 00:26:42 8524 [Note] InnoDB: Starting shutdown...
2017-04-12 00:26:43 8524 [Note] InnoDB: Shutdown completed; log sequence number
1625987
A RANDOM PASSWORD HAS BEEN SET FOR THE MySQL root USER !
You will find that password in '/root/.mysql_secret'.
You must change that password on your first connect,
no other statement but 'SET PASSWORD' will be accepted.
See the manual for the semantics of the 'password expired' flag.
Also, the account for the anonymous user has been removed.
In addition, you can run:
/usr/bin/mysql_secure_installation
which will also give you the option of removing the test database.
This is strongly recommended for production servers.
See the manual for more instructions.
Please report any problems at http://bugs.mysql.com/
The latest information about MySQL is available on the web at
http://www.mysql.com
Support MySQL by buying support/licenses at http://shop.mysql.com
WARNING: Found existing config file /usr/my.cnf on the system.
Because this file might be in use, it was not replaced,
but was used in bootstrap (unless you used --defaults-file)
and when you later start the server.
The new default config file was created as /usr/my-new.cnf,
please compare it with your file and take the changes you need.
WARNING: Default config file /etc/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server
[root@master mysql]# netstat -nat //检测端口是否启用
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN //22号端口在监听状态
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN
tcp 1 0 192.168.32.132:58955 219.93.37.75:80 CLOSE_WAIT
[root@master mysql]# service mysql start //启动mysql服务
Starting MySQL.Logging to '/usr/share/mysql/mysqldata/master.err'.
.. SUCCESS!
[root@master mysql]# rpm -ivh MySQL-client-5.6.36-1.linux_glibc2.5.x86_64.rpm //安装mysql客户端
warning: MySQL-client-5.6.36-1.linux_glibc2.5.x86_64.rpm: Header V3 DSA/SHA1
Signature, key ID 5072e1f5: NOKEY
Preparing...
(100%########################################### [100%]
1:MySQL-client (
1%########################################### [100%]
然后将此目录下的my-default.cnf 复制到/etc/my.cnf
[root@master ~]# cp /usr/share/mysql/my-default.cnf /etc/my.cnf //将配置文件复制到/etc/my.cnf
打开/etc/my.cnf 并配置
[root@master ~]# vim /etc/my.cnf
详细的配置项看：http://www.jb51.net/article/48082.htm
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
重点配置是红色字体
[client]
port=3306
socket=/var/lib/mysql/mysql.sock
[mysqld]
character_set_server = utf8
port = 3306
datadir = /usr/share/mysql/mysqldata
socket =/var/lib/mysql/mysql.sock
explicit_defaults_for_timestamp=true
skip_name_resolve
log_bin_trust_function_creators = 1
event_scheduler=ON
lower_case_table_names=1
federated
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
max_connections = 1000
max_connect_errors = 10000
# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
server_id =0
# socket = .....
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysql]
default-character-set = utf8
保存退出；
注意:若出现PID not found 的情况，可以注释掉配置文件中的default-character-set=utf8
然后关闭后台进程，重新启动mysql服务。
在安装mysql server的过程中，它会随机生成一个默认的密码，位置在： /root/.mysql_secret
打开这个文件之后就可以看到随机的密码了。
[root@master mysql]# cat /root/.mysql_secret
# The random password set for the root user at Tue Apr 11 01:35:47 2017 (local time):
HwPKi2jYCHdPOdR1 //系统生成的密码
# The random password set for the root user at Wed Apr 12 00:26:39 2017 (local time):
#####密码##### //默认的密码
[root@master mysql]# mysql -uroot -p
Enter password: #####密码##### //默认的密码
mysql> SET Password=PASSWORD('newpassword') //修改密码
mysql> FLUSH PRIVILEGES;
mysql> quit
[root@master mysql]# mysql -uroot -p
Enter password: <输入新设的密码newpassword>
rpm安装默认目录：
数据文件：/var/lib/mysql/
配置文件模板：/usr/share/mysql
mysql客户端工具目录：/usr/bin
日志目录：/var/log/