linux系统安装mysql5.7.22-白红宇

linux系统安装mysql5.7.22

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发布时间：2019-06-24

本文共 3457 字，大约阅读时间需要 11 分钟。

1.下载mysql

2.下载完后上传到linux下的mysql目录下解压，执行命令：tar mysql-5.6.17-linux-glibc2.5-i686.tar.gz

建议：最好安装到/usr/local/mysql目录中，安装到别的目录可能会出现很多问题

3.重命名

rm -rf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

mv mysql-5.7.22-linux-glibc2.12-x86_64/ mysql

4.卸载系统自带mysql

查看：rpm -qa|grep mysql

卸载：rpm -e -nodeps softfullname

没安装mysql直接下一步

5.创建用户组和用户

创建用户组：groupadd mysql

创建用户：useradd -r -g mysql mysql

为了安全性，给mysql数据库创建专有用户，该用户只能访问mysql目录，不能访问系统其它目录

另外不建议直接用root初始化mysql，否则连接mysql时会报错：[ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!

6.给mysql用户指定专有用户和用户组

首先创建data目录

cd /usr/local/mysql

mkdir data

指定用户和用户组：

cd /usr/local

chown -R mysql mysql/

chgrp -R mysql mysql/

7、初始化mysql

cd /usr/local/mysql/bin

./mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/ --lc_messages_dir=/usr/local/mysql/share --lc_messages=en_US

记住生成的临时密码

如果忘记密码或者想重新初始化，可以先将mysql/data目录中文件删除，然后再执行初始化命令

8、配置my.cnf

vi /etc/my.cnf

精简版：只要这两行其余的注释掉

[mysqld]  basedir=/usr/local/mysql/  datadir=/usr/local/mysql/data/

可选版：

# 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]  # sql_mode = NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES     # 一般配置选项  basedir = /usr/local/mysql/  datadir = /usr/local/mysql/data  port = 3306  character-set-server = utf8  explicit_defaults_for_timestamp = true  # socket = /var/run/mysqld/mysqld.sock    #下面是可选项，要不要都行，如果出现启动错误，则全部注释掉，保留最基本的配置选项，然后尝试添加某些配置项后启动，检测配置项是否有误  back_log = 300  max_connections = 3000  max_connect_errors = 50  table_open_cache = 4096  max_allowed_packet = 32M  #binlog_cache_size = 4M    max_heap_table_size = 128M  read_rnd_buffer_size = 16M  sort_buffer_size = 16M  join_buffer_size = 16M  thread_cache_size = 16  query_cache_size = 128M  query_cache_limit = 4M  ft_min_word_len = 8    thread_stack = 512K  transaction_isolation = REPEATABLE-READ  tmp_table_size = 128M  #log-bin=mysql-bin  long_query_time = 6    server_id=1    innodb_buffer_pool_size = 1G  innodb_thread_concurrency = 16  innodb_log_buffer_size = 16M    innodb_log_file_size = 512M  innodb_log_files_in_group = 3  innodb_max_dirty_pages_pct = 90  innodb_lock_wait_timeout = 120  innodb_file_per_table = on    [mysqldump]  quick  max_allowed_packet = 32M    [mysql]  no-auto-rehash  default-character-set=utf8  safe-updates    [myisamchk]  key_buffer = 16M  sort_buffer_size = 16M  read_buffer = 8M  write_buffer = 8M    [mysqlhotcopy]  interactive-timeout    [mysqld_safe]  open-files-limit = 8192

9、启动

cd /usr/local/mysql/bin

启动：./mysqld_safe --user=mysql &

10、设为开机启动

cd /usr/local/mysql/support-files/

cp mysql.server /etc/init.d/mysql

vi /etc/init.d/mysql

将mysql目录填上：

basedir=/usr/local/mysql/

datadir=/usr/local/mysql/data/