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为什么你的MySQL安装总失败?这份Linux 5.7.20二进制部署指南(附全套命令)请收好

  • 2026-03-16 01:18:32
为什么你的MySQL安装总失败?这份Linux 5.7.20二进制部署指南(附全套命令)请收好
大家好,我是老易。在Linux环境下安装MySQL,对于很多刚入门的小伙伴来说,可能是一道不小的坎——路径规划不合理、权限配置出错、初始化失败……每一步都可能让人抓狂。网上教程虽多,但要么过于简略,要么环境对不上,照着做往往还是踩坑。今天这篇文章,是我基于多年实战经验整理的一份 “保姆级”二进制安装MySQL 5.7.20全记录。从硬件准备、LVM磁盘规划,到系统参数调优、my.cnf详解,再到最后的远程连接与问题排查,每一步都有命令、有注释、有避坑提示。哪怕你是第一次接触Linux,只要跟着敲,也能成功跑起MySQL!如果你在安装过程中遇到任何问题,或者有更好的实践经验,欢迎在评论区留言,我们一起交流,让后来的人少走弯路。
  • 2.2.1 MYSQL硬件环境准备
  • 2.2.2 MYSQL软件下载
  • 2.2.3 磁盘规划
    • 2.2.3.1 路径规划
  • 2.2.4 LVM卷管理
    • 2.2.4.1 创建物理卷PV
    • 2.2.4.2 创建卷组VG
    • 2.2.4.3 创建逻辑卷LV
    • 2.2.4.4 卷查看
    • 2.2.4.5 格式化逻辑卷
    • 2.2.4.6 逻辑卷挂载
    • 2.2.4.7 加载到开机启动中
    • 2.2.4.8 Lv扩容,缩容
    • 2.2.4.9 移除
  • 2.2.5 安装前系统配置
    • 2.2.5.1 配置hosts
    • 2.2.5.2 英文环境配置
    • 2.2.5.3 创建用户、组、目录
    • 2.2.5.4 修改资源限参数
    • 2.2.5.5 修改nproc参数
    • 2.2.5.6 修改安全策略
    • 2.2.5.7 关闭防火墙
    • 2.2.5.8 控制给用户分配的资源
    • 2.2.5.9 配置本地YUM源及软件包安装
    • 2.2.5.10 检查是否有历史版本的mysql
    • 2.2.5.11 检查mysql其它相关文件
  • 2.2.6 MYSQL安装
    • 2.2.6.1 上传并解压安装包
    • 2.2.6.2 配置环境变量(root用户)
    • 2.2.6.3 修改权限
    • 2.2.6.4 初始化参数
    • 2.2.6.5 初始化数据库
    • 2.2.6.6 SSL认证(历史版本安装时需要)
    • 2.2.6.7 配置启动、停止配置文件
    • 2.2.6.8 测试是否能启动成功
    • 2.2.6.9 正常停止mysql
    • 2.2.6.10 查看mysql是否启动
    • 2.2.6.11 其它方式启动、停止mysql
  • 2.2.7 远程连接与测试
    • 2.2.7.1 打开设置界面
    • 2.2.7.2 设置连接参数
    • 2.2.7.3 测试连接
    • 2.2.7.4 解决测试连接出现的问题
    • 2.2.7.5 再次测试连接
  • 2.2.8 后期配置
    • 2.2.8.1 数据库启动、停止
    • 2.2.8.2 数据库的登陆方式
    • 2.2.8.3 查看当前有多少数据库
    • 2.2.8.4 修改数据库密码
    • 2.2.8.5 创建一个可以远程访问的用户
    • 2.2.8.6 如果忘记密码如何处理
    • 2.2.8.7 密码过期处理
  • 2.2.9 删除数据库
    • 2.2.9.1 删除数据库

2.2 Linux环境下安装MySQL5.7.20(二进制安装)

2.2.1 MYSQL硬件环境准备

  • OS:Linux 7
  • MYSQL:5.7.20

2.2.2 MYSQL软件下载

  • 地址www.mysql.com[1]

2.2.3 磁盘规划

2.2.3.1 路径规划

路径
大小
备注
/mysql/app/mysql
200G(根据实际需要分配)
安装目录
/mysql/data
-
数据目录
/mysql/log
-
日志目录
/mysql/backup
-
备份目录

2.2.4 LVM卷管理

2.2.4.1 创建物理卷PV

[root@asmorcl ~]# pvcreate /dev/sdb /dev/sdc

2.2.4.2 创建卷组VG

[root@asmorcl ~]# vgcreate vgmysql /dev/sdb /dev/sdc

2.2.4.3 创建逻辑卷LV

[root@asmorcl ~]# lvcreate -n lvmysql -L 200G vgmysql

2.2.4.4 卷查看

pvs 或者 pvdisplayvgs 或者 vgdisplaylvs 或者 lvdisplay

2.2.4.5 格式化逻辑卷

[root@asmorcl ~]# mkfs.ext4 /dev/vgmysql/lvmysql

2.2.4.6 逻辑卷挂载

mkdir /mysql[root@asmorcl ~]# mount /dev/vgmysql/lvmysql /mysql

2.2.4.7 加载到开机启动中

编辑 /etc/fstab,增加:

/dev/vgmysql/lvmysql  /mysql ext4 defaults 0 0

2.2.4.8 Lv扩容,缩容

LV扩容

# lv空间加1g[root@asmorcl ~]# lvextend -L +1g /dev/vgmysql/lvmysql  # lv空间加到30g[root@asmorcl ~]# lvextend -L 30g /dev/vgmysql/lvmysql  # vg扩容[root@asmorcl ~]# pvcreate /dev/sdn[root@asmorcl ~]# vgcreate backvg /dev/sdn

LV缩容

[root@asmorcl ~]# lvreduce -L -2G /dev/vgback/lvback

2.2.4.9 移除

[root@asmorcl ~]# lvremove /dev/backvg/backlv[root@asmorcl ~]# vgremove backvg[root@asmorcl ~]# pvremove /dev/sdp

2.2.5 安装前系统配置

2.2.5.1 配置hosts

echo "192.168.101.68 lmysql ">>/etc/hostscat /etc/hosts

2.2.5.2 英文环境配置

export LANG=en_US >>~/.bash_profile

2.2.5.3 创建用户、组、目录

groupadd mysqluseradd –r –g mysql –s /bin/false mysql  [root@lmysql ~]# mkdir -p /mysql/data/3306/data[root@lmysql ~]# mkdir -p /mysql/log/3306[root@lmysql ~]# mkdir -p /mysql/app[root@lmysql ~]# mkdir -p /mysql/backup

2.2.5.4 修改资源限参数

编辑 /etc/security/limits.conf,增加如下内容:

* soft nproc 16384* hard nproc 16384* soft nofile 16384* hard nofile 65536* soft stack 10240* hard stack 32768

2.2.5.5 修改nproc参数

echo "* - nproc 16384 " > /etc/security/limits.d/90-nproc.conf

2.2.5.6 修改安全策略

编辑 /etc/selinux/config,将:

SELINUX=enabled

改为:

SELINUX=disabled

立即生效:

setenforce 0

2.2.5.7 关闭防火墙

systemctl stop firewalld.servicesystemctl disable firewalld.servicesystemctl status firewalld.service

2.2.5.8 控制给用户分配的资源

echo "session required pam_limits.so" >> /etc/pam.d/login

2.2.5.9 配置本地YUM源及软件包安装

mount /dev/cdrom /mntcd /etc/yum.repos.drm *.repovi o2cfs.repo

增加如下内容:

[EL]name=o2cfsbaseurl=file:///mntgpgcheck=0enabled=1

2.2.5.10 检查是否有历史版本的mysql

rpm –qa|grep mysqlrpm –e <包名>rpm –qa|grep mariadbrpm –e <包名># 强制删除[root@linux7 yum.repos.d]# rpm -e mariadb-libs-5.5.60-1.el7_5.x86_64 --nodeps

2.2.5.11 检查mysql其它相关文件

find / -name mysql# 删除相关文件rm -rf ...

2.2.6 MYSQL安装

2.2.6.1 上传并解压安装包

cd /mysql/apptar –zxvf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gzln –s mysql-5.7.20-linux-glibc2.12-x86_64 mysql

2.2.6.2 配置环境变量(root用户)

编辑 ~/.bash_profile

PATH=$PATH:/mysql/app/mysql/bin:$HOME/binexport PATH

查看版本:

mysql –versionwhich mysql

2.2.6.3 修改权限

chown –R mysql:mysql /mysqlchmod –R 775 /mysql

2.2.6.4 初始化参数

默认读取参数位置:/etc/my.cnf

创建配置文件 /mysql/data/3306/my.cnf,内容如下:

[client]port=3306socket=/mysql/data/3306/mysql.sock[mysql]no-beepprompt="\u@mysqldb \R:\m:\s [\d]> "#no-auto-rehashauto-rehashdefault-character-set=utf8[mysqld]########basic settings########server-id=3306port=3306user = mysqlbind_address = 0.0.0.0basedir=/mysql/app/mysqldatadir=/mysql/data/3306/data#tmpdir="E:\\MySQL\\tmp"socket=/mysql/data/3306/mysql.sockpid-file =/mysql/data/3306/mysql.pidcharacter-set-server=utf8skip-character-set-client-handshake=1autocommit = 0#skip_name_resolve = 1federatedmax_connections = 800max_connect_errors = 1000default-storage-engine=INNODBtransaction_isolation = READ-COMMITTEDexplicit_defaults_for_timestamp=1sort_buffer_size = 32Mjoin_buffer_size = 128Mtmp_table_size = 72Mmax_allowed_packet = 16Msql_mode = "STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER"interactive_timeout = 1800wait_timeout = 1800read_buffer_size = 16Mread_rnd_buffer_size = 32Mquery_cache_type = 1query_cache_size=1Mtable_open_cache=2000thread_cache_size=768key_buffer_size=32Mread_buffer_size=8Mread_rnd_buffer_size=4Mback_log=1024#flush_time=0open_files_limit=65536table_definition_cache=1400#binlog_row_event_max_size=8K#sync_master_info=10000#sync_relay_log=10000#sync_relay_log_info=10000########log settings########log-output=FILEgeneral-log=0general_log_file=/mysql/log/3306/all-general.errslow-query-log=ONslow_query_log_file=/mysql/log/3306/slow-query.errlong_query_time=10log-error=/mysql/log/3306/log-error.errlog_queries_not_using_indexes = 1log_slow_admin_statements = 1log_slow_slave_statements = 1log_throttle_queries_not_using_indexes = 10expire_logs_days = 90min_examined_row_limit = 100########replication settings##########master_info_repository = TABLE#relay_log_info_repository = TABLE#log_bin = bin.log#sync_binlog = 1#gtid_mode = on#enforce_gtid_consistency = 1#log_slave_updates#binlog_format = row#relay_log = relay.log#relay_log_recovery = 1#binlog_gtid_simple_recovery = 1#slave_skip_errors = ddl_exist_errors########innodb settings########## 根据您的服务器IOPS能力适当调整# 一般配普通SSD盘的话,可以调整到 10000 - 20000# 配置高端PCIe SSD卡的话,则可以调整的更高,比如 50000 - 80000innodb_io_capacity = 4000innodb_io_capacity_max = 8000innodb_buffer_pool_size = 5000Minnodb_buffer_pool_instances = 8innodb_buffer_pool_load_at_startup = 1innodb_buffer_pool_dump_at_shutdown = 1innodb_lru_scan_depth = 2000innodb_lock_wait_timeout = 5#innodb_flush_method = O_DIRECTinnodb_log_file_size = 200Minnodb_log_files_in_group = 2innodb_log_buffer_size = 16Minnodb_undo_logs = 128innodb_undo_tablespaces = 3innodb_undo_log_truncate = 1innodb_max_undo_log_size = 2Ginnodb_flush_neighbors = 1innodb_purge_threads = 4innodb_large_prefix = 1innodb_thread_concurrency = 64innodb_print_all_deadlocks = 1innodb_strict_mode = 1innodb_sort_buffer_size = 64Minnodb_flush_log_at_trx_commit=1innodb_autoextend_increment=64innodb_concurrency_tickets=5000innodb_old_blocks_time=1000innodb_open_files=65536innodb_stats_on_metadata=0innodb_file_per_table=1innodb_checksum_algorithm=0innodb_data_file_path=ibdata1:200M;ibdata2:200M;ibdata3:200M:autoextend:max:5G#生产环境建议2个1G,最后再弄个自动扩展5G,根据自己的事物对定。innodb_temp_data_file_path = ibtmp1:200M:autoextend:max:20Ginnodb_buffer_pool_dump_pct = 40innodb_page_cleaners = 4innodb_purge_rseg_truncate_frequency = 128binlog_gtid_simple_recovery=1log_timestamps=system#transaction_write_set_extraction=MURMUR32show_compatibility_56=on

2.2.6.5 初始化数据库

[root@lmysql 3306]# mysqld --defaults-file=/mysql/data/3306/my.cnf --initialize --user=mysql --basedir=/mysql/app/mysql --datadir=/mysql/data/3306/data

2.2.6.6 SSL认证(历史版本安装时需要)

mysql_ssl_rsa_setup --user=mysql --basedir=/mysql/app/mysql --datadir=/mysql/data/3306/data

2.2.6.7 配置启动、停止配置文件

cd /mysql/app/mysql/support-filescp mysql.server mysqlvi mysql

修改以下内容:

basedir=/mysql/app/mysqldatadir=/mysql/data/3306/datamysqld_pid_file_path=/mysql/data/3306/mysql.pidbindir=/mysql/app/mysql/binsbindir=/mysql/app/mysql/sbinlibexecdir=/mysql/app/mysql/bin

并在文件中找到启动命令位置,确保使用正确的配置文件,例如:

$bindir/mysqld_safe --defaults-file=/mysql/data/3306/my.cnf --datadir="$datadir"

2.2.6.8 测试是否能启动成功

方式一:

cp mysql /etc/init.d/service mysql startservice mysql stop

方式二:

mysqld_safe --defaults-file=/mysql/data/3306/my.cnf

或者创建启动脚本 mysql_start

vi mysql_start# 内容:mysqld_safe --defaults-file=/mysql/data/3306/my.cnfchmod 775 mysql_start./mysql_start

2.2.6.9 正常停止mysql

ln -sf /mysql/data/3306/mysql.sock /tmp/mysqladmin -uroot -p123456 shutdown -S /mysql/data/3306/mysql.sock# 或者./mysql stop

2.2.6.10 查看mysql是否启动

./mysql status# 或者ps –ef|grep mysql

2.2.6.11 其它方式启动、停止mysql

cd /mysql/app/mysql/support-filescp mysql /etc/init.d/service mysql startservice mysql stop

2.2.7 远程连接与测试

2.2.7.1 打开设置界面

(此处可能为图形界面步骤,略)

2.2.7.2 设置连接参数

(略)

2.2.7.3 测试连接

(略)

2.2.7.4 解决测试连接出现的问题

use mysql;update user set host='%' where user='root';flush privileges;

2.2.7.5 再次测试连接

(略)

2.2.8 后期配置

2.2.8.1 数据库启动、停止

(已在前文描述)

2.2.8.2 数据库的登陆方式

mysql -uroot -p -S /mysql/data/3306/mysql.sock

2.2.8.3 查看当前有多少数据库

show databases;

2.2.8.4 修改数据库密码

use mysql;-- 方式一:update user set authentication_string=password("1234567") where user='root';-- 方式二:set password=password('123456');flush privileges;

2.2.8.5 创建一个可以远程访问的用户

grant all privileges on *.to 'root'@'%' identified by '123456';flush privileges;

2.2.8.6 如果忘记密码如何处理

编辑 /mysql/data/3306/my.cnf,在 [mysqld] 段增加:

skip-grant-tables

然后重启mysql,即可无密码登录,之后再注释掉该行并重启。

2.2.8.7 密码过期处理

use mysql;update user set password_expired='N' where user='root';flush privileges;

2.2.9 删除数据库

2.2.9.1 删除数据库

rm –rf /mysql/app/*rm –rf /mysql/data/*rm –rf /mysql/log/*rm –rf /etc/init.d/mysqlid mysqluserdel mysqlgroupdel mysql

至此,MySQL 5.7.20已经成功安装在你的Linux服务器上,并且完成了基础的安全配置和调优。你可以用它来支撑你的业务,或者作为学习数据库管理的实验环境。这篇文章几乎涵盖了二进制安装的全流程,但实际生产环境可能还有更多细节(比如主从复制、性能压测、备份策略等),这些我会在后续的文章中陆续推出。如果你觉得本文对你有帮助,别忘了点个“在看”并分享给身边需要的小伙伴,也欢迎关注我的公众号 [老易学DB],第一时间获取最新技术干货。最后想问问大家:你在安装MySQL时遇到过最诡异的报错是什么?后来怎么解决的?来评论区晒出你的“踩坑经验”,我们一起给新手们“排雷”!👇我们下期见!

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  1. CONNECT:[ UseTime:0.000415s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000572s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000279s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000250s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000455s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000489s ]
  8. SELECT * FROM `article` WHERE `id` = 480256 LIMIT 1 [ RunTime:0.000397s ]
  9. UPDATE `article` SET `lasttime` = 1774587399 WHERE `id` = 480256 [ RunTime:0.004373s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000777s ]
  11. SELECT * FROM `article` WHERE `id` < 480256 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000429s ]
  12. SELECT * FROM `article` WHERE `id` > 480256 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000401s ]
  13. SELECT * FROM `article` WHERE `id` < 480256 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009278s ]
  14. SELECT * FROM `article` WHERE `id` < 480256 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001573s ]
  15. SELECT * FROM `article` WHERE `id` < 480256 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003433s ]
0.091523s