环境介绍：本安装教程基于虚拟机CentOS7.6版本进行安装，mysql版本为5.7版本。

一、卸载已安装的mysql服务

由于我原本在虚拟机已安装过mysql，所以这里我需要先卸载掉mysql才能进行实验安装教程，若你从未安装过mysql无需进行这一步操作。

查看是否安装有mysql服务可以通过以下命令：

[root@localhost ~]# rpm -qa | grep mysql

mysql80-community-release-el7-3.noarch

mysql-community-client-5.7.26-1.el7.x86_64

mysql-community-libs-5.7.26-1.el7.x86_64

mysql-community-server-5.7.26-1.el7.x86_64

mysql-community-common-5.7.26-1.el7.x86_64

mysql-community-libs-compat-5.7.26-1.el7.x86_64

[root@localhost ~]#

查看mysql是否正在运行，若在运行，应先将服务停止再进行卸载

[root@localhost ~]# service mysqld status

Redirecting to /bin/systemctl status mysqld.service

● mysqld.service - MySQL Server

Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)

Active: inactive (dead) since Sat 2019-07-20 13:59:09 CST; 28s ago

Docs: man:mysqld(8)

http://dev.mysql.com/doc/refman/en/using-systemd.html

Process: 7698 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)

Process: 6813 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)

Main PID: 7826 (code=exited, status=0/SUCCESS)

Jul 20 13:50:13 localhost.localdomain systemd[1]: Starting MySQL Server...

Jul 20 13:50:17 localhost.localdomain systemd[1]: Started MySQL Server.

Jul 20 13:59:08 localhost.localdomain systemd[1]: Stopping MySQL Server...

Jul 20 13:59:09 localhost.localdomain systemd[1]: Stopped MySQL Server.

[root@localhost ~]# service mysqld stop

开始卸载

[root@localhost ~]# rpm -e $(rpm -qa | grep mysql-)

error: Failed dependencies:

libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64

libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64

[root@localhost ~]#

由于有些库被其他服务依赖无法卸载，需要先卸载依赖该库的服务。这里我们直接用--nodeps参数忽略依赖

[root@localhost ~]# rpm -e $(rpm -qa | grep mysql-) --nodeps

[root@localhost ~]#

[root@localhost ~]# rpm -qa | grep mysql

[root@localhost ~]#

卸载完成

二、下载源码包

官网5.7源码包下载地址：https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.26-el7-x86_64.tar.gz

[root@localhost src]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.26-el7-x86_64.tar.gz

不过linux下下载这个文件真的有些慢，不信你看

于是我只能本地使用IDM下载，再上传到linux中。IDM属实给力啊！

标签：5.7,安装,linux,源码,mysqld,mysql,root,el7,localhost

来源： https://www.cnblogs.com/welisit/p/11217613.html