1.下载安装包
可以用.tar.gz或者.rpm包，这里我用的是mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz
2.建立用户以及用户组
groupadd mysql useradd -r -g mysql mysql
3.建立安装包目录和安装目录
mkdir /usr/myfiles mkdir /usr/works 4.通过Xftp将安装包放进/usr/myfiles文件夹下
5.安装到指定目录
tar -zxvf /usr/myfiles/mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz -C /usr/works 注意如果mysql-5.7.16-linux-glibc2.5-x86_64目录下没有data目录，手动建一个6.目录权限设置
cd /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64 chown mysql:mysql -R .注意这里-R后面还有个 ” 空格 + . “ 漏了的话会提示语法错误。 7.初始化
/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/bin/mysqld --initialize --user=mysql --datadir=/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/data --basedir=/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64 成功后会有以下提示信息
201x-xx-xxT07:10:13.583130Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 201x-xx-xx T07:10:13.976219Z 0 [Warning] InnoDB: New log files created, LSN=45790 201x-xx-xx T07:10:14.085666Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 201x-xx-xx T07:10:14.161899Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 1fa941f9-effd-11e5-b67d-000c2958cdc8. 201x-xx-xx T07:10:14.165534Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 201x-xx-xx T07:10:14.168555Z 1 [Note] A temporary password is generated for root@localhost: q1SLew5T_6K, 这里要注意，最后一行后面有一个初始密码，找个地方把它存起来，后面会用到！
8. my.cnf配置
将/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/support-files/my-default.cnf 改名为my.cnf，再拷到/etc/下
cp /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/support-files/my-default.cnf /etc/my.cnf my.cnf配置
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.7/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. [mysqld] # 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 # These are commonly set, remove the # and set as required. # basedir = ..... # datadir = ..... # port = ..... # server_id = ..... # socket = ..... #log-bin=mysql-bin #server-id=80 # 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 #安装路径 basedir = /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64 #数据存放路径 datadir = /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/data #端口号 port = 3306 socket = /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/temp/mysql.sock sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES #default-character-set=utf8 character-set-server=utf8 init_connect='SET NAMES utf8' wait_timeout=300 back_log = 500 max_connections = 3000 max_connect_errors = 6000 external-locking = FALSE max_allowed_packet = 64M sort_buffer_size = 2M join_buffer_size = 2M thread_cache_size = 300 query_cache_size = 64M query_cache_limit = 4M query_cache_min_res_unit = 2k default-storage-engine = MyISAM thread_stack = 192K transaction_isolation = READ-COMMITTED tmp_table_size = 256M max_heap_table_size = 256M long_query_time = 2 binlog_cache_size = 4M max_binlog_cache_size = 8M max_binlog_size = 512M expire_logs_days = 7 key_buffer_size = 2048M read_buffer_size = 2M read_rnd_buffer_size = 16M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_repair_threads = 1 lower_case_table_names = 1 innodb_buffer_pool_size = 2048M innodb_thread_concurrency = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 16M innodb_log_file_size = 128M innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 innodb_file_per_table = 0 [client] socket = /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/temp/mysql.sock default-character-set=utf8 [mysql] default-character-set=utf8 [mysqld_safe] #日志路径 log-error=/var/log/mysql/mysqld.log 注意：/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/下temp文件夹如果没有需要自己建，/var/log/下mysql也一样。
9.设置mysql运行权限及开机自启动
将/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/ support-files/mysql.server 拷
贝为/etc/init.d/mysql并设置运行权限
cp mysql.server /etc/init.d/mysql chmod +x /etc/init.d/mysql chown -R mysql:mysql /usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/ 设置开机自启动
chkconfig --add mysql
10.客户端连接测试
开启服务
/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/bin/mysqld_safe&
/usr/works/mysql-5.7.16-linux-glibc2.5-x86_64/bin/mysql -uroot -p 这时用户名root，密码就是前面让你保存下来的那个密码
如果出现以下错误，
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
请往上看，是否每一步做到位，改建的文件夹建了吗，有些文件夹该给的权限给了
吗，去my.cnf里面设置的log文件目录里找log文件看具体是哪里出错了，一般都能解决。
连上后，记得修改密码
mysql> alter user 'root'@'localhost' identified by 'xxxxxxx';
最后，开启远程连接
mysql>grant all privileges on *.* to 'root'@'%' identified by 'rootpasswd' with grant option; 开放3306端口 /sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT #开启3306端口 此时，大功告成！
