11.1 LAMP架构介绍 11.2 MySQLMariaDB介绍 11.3/11.4/11.5 MySQL安装
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11.1 LAMP架构介绍
11.2 mysql、MariaDB介绍
11.3/11.4/11.5 MySQL安装
扩展 mysql5.5源码编译安装 http://www.aminglinux.com/bbs/thread-1059-1-1.html mysql5.7二进制包安装(变化较大) http://www.apelearn.com/bbs/thread-10105-1-1.html
11.1 LAMP架构介绍
Linux + Apache(httpd)+ MySQL + php
PHP网站(Google、淘宝、百度、51cto博客、猿课论坛)
三个角色可以在一台机器、也可以分开(httpd和PHP要在一起)
LAMP架构介绍
httpd 、 PHP 、MySQL 三者如何工作
Apache(httpd)和 PHP是一个整体 (PHP是以一个模块的形式和Apache结合在一起)
但是Apache不能直接和MySQL 相互打交道,等通过PHP 模块,去MYSOL 里面拿数据,PHP把结果交给给apche ,apache 再交给用户,这样的一个过程,这种php 和 mysql 相连取数据的操作行为,叫做动态行为
访问一个网站,首先要登录,在登录的时候,这样的一个过程,在浏览器里输入网址,点登录,请求交给了apache ,apache 先检查,看下请求是动态还是静态,登录这个行为需要去把你的用户名密码提交给apache,apache拿到你的用户名密码,去数据库里面比对,看看是否正确,通过PHP模块和 mysql 去打交道,通过mysql 查到你的用户名密码是什么,然后php 做对比,看看对不对,如果对,apache 会返回给您一个登录的状态,这个过程属于一个动态的请求
动态请求 比如用户进入猿课论坛输入自己的账号密码
比如访问的图片,网站的logo,比如访问论坛的一个logo, 这个logo 也是需要到apache 上去请求的,apache拿到logo logo 它并没有存在mysql 里面 ,所以直接从静态文件这,也是就是你的linux服务器上 其中的一个目录下拿到这个图片 ,直接返回给用户,这个过程并没有和MySQL打交道,这个过程属于静态请求
静态请求,比如查看网站的图片、内容
MySQL里面不能存图片、文件, 可以存一些用户名密码,积分,回复帖子的内容
11.2 MySQL_MariaDB介绍
MySQL是一个关系型数据库,由mysql ab公司开发,mysql在2008年被sun公司收购(10亿刀),2009年sun公司被oracle公司收购(74亿刀)
MySQL官网https://www.mysql.com 最新版本5.7GA/8.0DMR
MySQL5.6变化比较大,5.7性能上有很大提升
Mariadb为MySQL的一个分支,官网https://mariadb.com/最新版本10.2
MariaDB主要由SkySQL公司(现更名为MariaDB公司)维护,SkySQL公司由MySQL原作者带领大部分原班人马创立.
Mariadb5.5版本对应MySQL的5.5,10.0对应MySQL5.6 Community 社区版本,Enterprise 企业版,GA(Generally Available)指通用版本,在生产环境中用的,DMR(Development Milestone Release)开发里程碑发布版,RC(ReleaseCandidate)发行候选版本,Beta开放测试版本,Alpha内部测试版本
# 11.3 MySQL 安装 (上) - MySQL的几个常用安装包:rpm、源码、二进制免编译 - 二进制免编译(发布之前在linux服务器上租了一个编译,编译完了之后,把编译完成的文件重新安排,放到一个目录下去,然后打包压缩,发布)有一个好处,不用花那么多时间去配置,直接拿来用就可以 - rpm 包有一个缺点,没有办法去定义你所安装的路径,默认就安装在/usr下 - 二进制免编译包可以放在一个目录下,比如说/urs/local/src下,也可以放在别的目录下,随便你自己 - 二进制免编译包毕竟在其他编辑器上编辑的,如果想追求极致的性能,就自己去编译 - 如果工作中没有特殊的要求,可以用二进制免编译包就可以。 - 先进入到目录 /usr/local/src ``` [[email protected] ~]# cd /usr/local/src/ [[email protected] src]# ls httpd-2.4.27 httpd-2.4.27.tar.gz ``` - 用命令uname -a 查看当前系统版本,x86_64 这个是64位的 - 可以去r.aminglinux.com 下载地址 ,我们这边下载5.6_64位二进制包 ``` [[email protected] src]# uname -a Linux aminglinux-001 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux [[email protected] src]# ``` - 使用wget下载 ``` [[email protected] src]# wget http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.35-linux-glibc2 --2017-09-19 23:06:16-- http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.35-linux-glibc2.5-x86_ 正在解析主机 mirrors.sohu.com (mirrors.sohu.com)... 221.236.12.140 正在连接 mirrors.sohu.com (mirrors.sohu.com)|221.236.12.140|:80... 已连接。 已发出 HTTP 请求,正在等待回应... 200 OK 长度:314581668 (300M) [application/octet-stream] 正在保存至: “mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz” 12% [============> 100%[======================================================>] 314,581,668 486KB/s 用时 18m 3s 2017-09-19 23:24:19 (284 KB/s) - 已保存 “mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz” [314581668/314581668]) [[email protected] src]# ``` # 11.4 MySQL 安装 (中) - 下载完之后第一步是要解压, ``` [[email protected] src]# ls httpd-2.4.27 httpd-2.4.27.tar.gz mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz [[email protected] src]# tar zxvf mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz . . . mysql-5.6.35-linux-glibc2.5-x86_64/mysql-test/include/stop_slave.inc mysql-5.6.35-linux-glibc2.5-x86_64/mysql-test/mysql-test-run.pl mysql-5.6.35-linux-glibc2.5-x86_64/mysql-test/purify.supp mysql-5.6.35-linux-glibc2.5-x86_64/mysql-test/valgrind.supp ``` - 挪目录到local目录下 并且改名mysql(mysql也是目录), mv /usr/local/mysql,然后到mysql目录下 ``` [[email protected] src]# mv mysql-5.6.35-linux-glibc2.5-x86_64 /usr/local/mysql [[email protected] src]# cd /usr/local/mysql/ [[email protected] mysql]# ls bin data include man README share support-files COPYING docs lib mysql-test scripts sql-bench [[email protected] mysql]# ``` - 创建mysql用户,创建目录/data/ ``` [[email protected] mysql]# useradd mysql [[email protected] mysql]# mkdir /data/ mkdir: 无法创建目录"/data/": 文件已存在 [[email protected] mysql]# ls /data/ liurongluan [[email protected] mysql]# ``` - 运行./scripts/mysql_install_db --user=mysql --datadir=/data/mysql 初始化 ``` [[email protected] mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/data/mysql FATAL ERROR: please install the following Perl modules before executing ./scripts/mysql_install_db: Data::Dumper [[email protected] mysql]# ``` - 现在报错了, please install the following Perl modules before executing 提示少了一个perl模块,名字是Dumper,尝试搜索一下 ``` [[email protected] mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/data/mysql FATAL ERROR: please install the following Perl modules before executing ./scripts/mysql_install_db: Data::Dumper [[email protected] mysql]# yum list |grep perl |grep -i dumper perl-Data-Dumper.x86_64 2.145-3.el7 base perl-Data-Dumper-Concise.noarch 2.020-6.el7 epel perl-Data-Dumper-Names.noarch 0.03-17.el7 epel perl-XML-Dumper.noarch 0.81-17.el7 base [[email protected] mysql]# ``` - 安装第四个试下 perl-XML-Dumper ``` [[email protected] mysql]# yum install -y perl-XML-Dumper 已加载插件:fastestmirror base | 3.6 kB 00:00:00 epel/x86_64/metalink 已安装: perl-XML-Dumper.noarch 0:0.81-17.el7 作为依赖被安装: perl-XML-Parser.x86_64 0:2.41-10.el7 完毕! [[email protected] mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/data/mysql FATAL ERROR: please install the following Perl modules before executing ./scripts/mysql_install_db: Data::Dumper [[email protected] mysql]# ``` - 还是不行,再试下第一个包 perl-Data-Dumper ``` [[email protected] mysql]# yum install -y perl-Data-Dumper 已加载插件:fastestmirror Loading mirror speeds from cached hostfile * epel: mirrors.tuna.tsinghua.edu.cn 已安装: perl-Data-Dumper.x86_64 0:2.145-3.el7 完毕! [[email protected] mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/data/mysql Installing MySQL system tables...2017-09-23 13:01:36 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2017-09-23 13:01:36 0 [Note] Ignoring --secure-file-priv value as server is running with --bootstrap. 2017-09-23 13:01:36 0 [Note] ./bin/mysqld (mysqld 5.6.35) starting as process 2630 ... 2017-09-23 13:01:36 2630 [Note] InnoDB: Using atomics to ref count buffer pool pages 2017-09-23 13:01:36 2630 [Note] InnoDB: The InnoDB memory heap is disabled Support MySQL by buying support/licenses at http://shop.mysql.com New default config file was created as ./my.cnf and will be used by default by the server when you start it. You may edit this file to change server settings 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 [[email protected] mysql]# ``` - 可以了,怎么查看一个命令执行完后 是否正确? 再上一个命令运行完之后 echo $? 结果是0 就是正确的,是1就是错误的 ``` [[email protected] mysql]# echo $? 0 [[email protected] mysql]# ``` - 初始化完成,下面就是拷贝配置文件和启动脚本,配置文件在哪?在这个目录下support-files/ ``` [[email protected] mysql]# ls support-files/ binary-configure magic my-default.cnf mysqld_multi.server mysql-log-rotate mysql.server [[email protected] mysql]# [[email protected] mysql]# ls support-files/my-default.cnf support-files/my-default.cnf ``` - 这里面大部分都是注释文件 ``` [[email protected] mysql]# vi support-files/my-default.cnf # 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. [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 = ..... # 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. "support-files/my-default.cnf" 31L, 1126C ``` - 下面就是拷贝配置文件和启动脚本 ``` [[email protected] mysql]# cp support-files/my-default.cnf /etc/my.cnf^C ``` - 拷贝之前 也可以看下系统自带的my.cnf 文件,要用自带的my.conf 需要修改里面配置文件 ``` [[email protected] mysql]# ls /etc/my.cnf /etc/my.cnf [[email protected] mysql]# rpm -qf /etc/my.cnf mariadb-libs-5.5.52-1.el7.x86_64 [[email protected] mysql]# [[email protected] mysql]# vim /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Settings user and group are ignored when systemd is used. # If you need to run mysqld under a different user or group, # customize your systemd unit file for mariadb according to the # instructions in http://fedoraproject.org/wiki/Systemd [mysqld_safe] log-error=/var/log/mariadb/mariadb.log pid-file=/var/run/mariadb/mariadb.pid # # include all files from the config directory ``` - 需要修改/etc/my.cnf 用默认的配置文件 ``` [mysqld] datadir=/data/mysql socket=/tmp/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Settings user and group are ignored when systemd is used. # If you need to run mysqld under a different user or group, # customize your systemd unit file for mariadb according to the # instructions in http://fedoraproject.org/wiki/Systemd [mysqld_safe] #log-error=/var/log/mariadb/mariadb.log #pid-file=/var/run/mariadb/mariadb.pid # # include all files from the config directory # #!includedir /etc/my.cnf.d ~ :wq ``` - 再一个就是它的启动脚本 ``` [[email protected] mysql]# ls bin data include man mysql-test scripts sql-bench COPYING docs lib my.cnf README share support-files [[email protected]inux-001 mysql]# ``` # 11.5 MySQL 安装 (下) - 再一个就是它的启动脚本 ``` [[email protected] mysql]# ls bin data include man mysql-test scripts sql-bench COPYING docs lib my.cnf README share support-files [[email protected] mysql]# [[email protected] mysql]# ls support-files/ binary-configure my-default.cnf mysql-log-rotate magic mysqld_multi.server mysql.server ``` - 把support-files/mysql.server脚本 拷贝到 改名 /etc/init.d/mysqld ``` [[email protected] mysql]# cp support-files/mysql.server /etc/init.d/mysqld [[email protected] mysql]# [[email protected] mysql]# vi /etc/init.d/mysqld # If you want to affect other MySQL variables, you should make your changes # in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files. # If you change base dir, you must also change datadir. These may get # overwritten by settings in the MySQL configuration files. basedir= datadir= -- INSERT -- ``` - 改下basedir datadir ``` # If you change base dir, you must also change datadir. These may get # overwritten by settings in the MySQL configuration files. basedir=/usr/local/mysql datadir=/data/mysql :wq ``` - 看下权限是755 ``` [[email protected] mysql]# vi /etc/init.d/mysqld [[email protected] mysql]# ls -l /etc/init.d/mysqld -rwxr-xr-x 1 root root 10902 9月 23 13:27 /etc/init.d/mysqld [[email protected] mysql]# ``` - 如果想让它开机启动,需要把它加入到系统服务列表里去 下次开机会自动启动 ``` [[email protected] mysql]# chkconfig --add mysqld [[email protected] mysql]# chkconfig --list 注意:该输出结果只显示 SysV 服务,并不包含原生 systemd 服务。SysV 配置数据可能被原生 systemd 配置覆盖。 如果您想列出 systemd 服务,请执行 ‘systemctl list-unit-files‘。 欲查看对特定 target 启用的服务请执行 ‘systemctl list-dependencies [target]‘。 mysqld 0:关 1:关 2:开 3:开 4:开 5:开 6:关 netconsole 0:关 1:关 2:关 3:关 4:关 5:关 6:关 network 0:关 1:关 2:开 3:关 4:关 5:关 6:关 [[email protected] mysql]# ``` - 同样的,也可以直接用命令把它启动起来 /etc/init.d/mysql start - 也可以这样service mysqld start ``` [[email protected] mysql]# ls -l /etc/init.d/mysqld -rwxr-xr-x 1 root root 10875 9月 23 18:13 /etc/init.d/mysqld [[email protected] mysql]# chmod 755 /etc/init.d/mysqld [[email protected] mysql]# vim /etc/init.d/mysqld [[email protected] mysql]# chkconfig --add mysqld [[email protected] mysql]# chkconfig mysqld on [[email protected]-001 mysql]# service mysqld start Starting MySQL.Logging to ‘/data/mysql/aminglinux-001.err‘. .. SUCCESS! [[email protected] mysql]# ``` - 查看下服务 是否有,看下进程 ``` [[email protected] mysql]# ps aux |grep mysql root 6110 0.0 0.1 11764 1580 pts/0 S 18:15 0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/aminglinux-001.pid mysql 6320 0.8 45.6 973052 456580 pts/0 Sl 18:15 0:01 /usr/local/mysq/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/aminglinux-001.err --pid-file=/data/mysql/aminglinux-001.pid --socket=/tmp/mysql.sock --port=3306 root 6386 0.0 0.0 112664 976 pts/0 S+ 18:19 0:00 grep --color=auto mysql [[email protected] mysql]# netstat -lntp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1131/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1648/master tcp6 0 0 :::3306 :::* LISTEN 6320/mysqld tcp6 0 0 :::22 :::* LISTEN 1131/sshd tcp6 0 0 ::1:25 :::* LISTEN 1648/master [[email protected] mysql]# ``` - 如果说有一天你没有办法把启动脚本放到/etc/init.d/ 下去,或者说你根本就没有这样的启动模板去拷贝,可以用这种方法去启动 - 首先我们先给mysqld 停掉 ``` [[email protected] mysql]# service mysqld stop Shutting down MySQL.. SUCCESS! [[email protected] mysql]# !ps ps aux |grep mysql root 6427 0.0 0.0 112664 972 pts/0 S+ 18:23 0:00 grep --color=auto mysql ``` - 使用这种方法命令行的方式启动 ``` [[email protected] mysql]# /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf --user=mysql --datadir=/data/mysql & [2] 6716 [1] 完成 /usr/local/mysql/bin/mysqld_safe --default-file=/etc/my.cnf --user=mysql --datadir=/data/mysql [[email protected] mysql]# 170923 18:28:43 mysqld_safe Logging to ‘/data/mysql/aminglinux-001.err‘. 170923 18:28:43 mysqld_safe Starting mysqld daemon with databases from /data/mysql [[email protected] mysql]# [[email protected] mysql]# ps aux |grep mysql root 6716 0.0 0.1 113256 1584 pts/0 S 18:28 0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf --user=mysql --datadir=/data/mysql mysql 6914 0.5 45.4 973052 454888 pts/0 Sl 18:28 0:00 /usr/local/mysql/binmysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/aminglinux-001.err --pid-file=/data/mysql/aminglinux-001.pid --socket=/tmp/mysql.sock --port=3306 root 6937 0.0 0.0 112664 976 pts/0 S+ 18:29 0:00 grep --color=auto mysql [[email protected] mysql]# [[email protected] mysql]# netstat -lntp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1131/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1648/master tcp6 0 0 :::3306 :::* LISTEN 6914/mysqld tcp6 0 0 :::22 :::* LISTEN 1131/sshd tcp6 0 0 ::1:25 :::* LISTEN 1648/master [[email protected] mysql]# ``` - 那怎么去关呢,可以用killall mysqld 命令 把这个服务停掉 ``` [[email protected] mysql]# killall mysqld [[email protected] mysql]# 170923 18:32:07 mysqld_safe mysqld from pid file /data/mysql/aminglinux-001.pid ended [[email protected] mysql]# !ps ps aux |grep mysql root 6950 0.0 0.0 112664 976 pts/0 R+ 18:32 0:00 grep --color=auto mysq [2]+ 完成 /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf [[email protected] mysql]# ``` - 建议大家用killall 安全一些,先停止当前的写读操作,把那些没有完成磁盘写入的数据写到磁盘里去,知道写完之后 才把进程杀死, - 如果以后遇到 mysqld 的进程 适中杀不死,等了好久没有把进程杀死ps 还有进程,那说明你的数据量很大,正在慢慢的写入磁盘离去,不要强制用kill ,很容易导致数据丢失,就慢慢的等就好了, - mysql 有俩个引擎 一个是innodb 一个是 myisam(存储量比较小) ## 扩展 - mysql5.5源码编译安装 http://www.aminglinux.com/bbs/thread-1059-1-1.html - MYSQL5.5源码安装 linux下 ,首先安装必要的库 ``` yum -y install gcc* ###### 安装 MYSQL ###### 首先安装camke 一、支持YUM,则 yum install -y cmake 二、也可以源码安装 cd /usr/local/src #下载cmake wget http://www.cmake.org/files/v2.8/cmake-2.8.7.tar.gz tar zxvf cmake-2.8.7.tar.gz cd cmake-2.8.7 #安装cmake ./configure make make install 安装 MYSQL 官网下载 MYSQL5.5版本 linux下源码包 http://dev.mysql.com/downloads/ 安装 groupadd mysql useradd -g mysql mysql tar zxvf mysql-5.2.25.tar.gz cd mysql-5.2.25 #cmake . //默认情况下安装,安装目录为/usr/local/mysql 数据目录为/usr/local/mysql/data #也可以指定参数安装,如指定UTF8,数据引擎等 #具体参照http://dev.mysql.com/doc/refman/ ... ration-options.html cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/mysql/data -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DWITH_EXTRA_CHARSETS:STRING=all -DWITH_DEBUG=0 -DWITH_SSL=yes -DWITH_READLINE=1 -DENABLED_LOCAL_INFILE=1 make && make install cd /usr/local/mysql chown -R mysql:mysql /usr/local/mysql ./scripts/mysql_install_db --user=mysql -datadir=/mysql/data #此处如不指定datadir,到启动时会报错 chown -R root . chown -R mysql data cp support-files/my-medium.cnf /etc/my.cnf bin/mysqld_safe --user=mysql & # Next command is optional cp support-files/mysql.server /etc/init.d/mysqld chmod +x /etc/init.d/mysqld /etc/init.d/mysqld start ``` 到此,安装完成 - mysql5.7二进制包安装(变化较大) http://www.apelearn.com/bbs/thread-10105-1-1.html - mysql5.7 二进制包安装 ``` 1. 下载包 wget http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.12-linux-glibc2.5-x86_64.tar.gz 若该链接失效,请到r.aminglinux.com 找最新的下载地址。 2. 解压 tar xxvf mysql-5.7.12-linux-glibc2.5-x86_64.tar.gz mv mysql-5.7.12-linux-glibc2.5-x86_64 /usr/local/mysql 3. 初始化 useradd -M -s /sbin/nologin mysql mkdir -p /data/mysql chown mysql /data/mysql cd /usr/local/mysql ./bin/mysqld --initialize --user=mysql --datadir=/data/mysql 注意,这一步最后一行会有一个提示 [Note] A temporary password is generated for [email protected]: B*s1i(*,kXwg 最后面的字符串为root密码。 ./bin/mysql_ssl_rsa_setup --datadir=/data/mysql 4. 拷贝配置文件和启动脚本 cp support-files/my-default.cnf /etc/my.cnf vim /etc/my.cnf //编辑或者修改 basedir = /usr/local/mysql datadir = /data/mysql port = 3306 socket = /tmp/mysql.sock cp support-files/mysql.server /etc/init.d/mysqld vi /etc/init.d/mysqld //编辑或者修改 basedir=/usr/local/mysql datadir=/data/mysql 5. 启动服务 /etc/init.d/mysqld start 6. 设置root密码 使用初始化密码登录 /usr/local/mysql/bin/mysql -uroot -p‘B*s1i(*,kXwg‘ //进入后直接设置密码 mysql>set password = password(‘mypass‘); //一定要设置一下新密码 退出来,再使用新的密码登录就可以了 还有一种情况,就是不知道初始化密码 vi /etc/my.cnf 在[mysqld]下面增加一行 skip-grant-tables 重启 /etc/init.d/mysqld restart /usr/local/mysql/bin/mysql -uroot mysql> update user set authentication_string=password(‘123333‘) where user=‘root‘; 退出来后,更改my.cnf,去掉刚加的 skip-grant-tables 重启 /etc/init.d/mysqld restart ``` - 此时就可以使用新的密码了。
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