centos7 mounting mysql 5.7.23 linux-glibc2.12-x86_64.tar.gz--detailed steps

1. Uninstall Linux system comes on mysql plug-in (old version)

1, first check the version number of Linux servers to be installed cglib, command strings /lib64/libc.so.6 | grep GLIBC, see if they have the appropriate cglib version, as follows:

Only cglib in the system list before they can install, so you do not need to upgrade the system cglib

2, find the relevant installation mysql:

rpm -qa|grep -i mysql

The following may occur one or more, not better, that your system is clean, but just in case, in any case following a change operation or inspection

perl-DBD-MySQL-4.013-3.el6.x86_64

mysql-libs-5.1.71-1.el6.x86_64

qt-mysql-4.6.2-26.el6_4.x86_64

mysql-5.1.71-1.el6.x86_64

mysql-server-5.1.71-1.el6.x86_64

mysql-community-common-5.7.23-1.el7.x86_64

If one or more of the above occurs, do not worry, use the uninstall command, there are a few to get rid of a few!

Uninstall command: rpm -ev {} package name, such as:

rpm -ev mysql-community-common-5.7.23-1.el7.x86_64

Find the old version of the mysql command related to the installation directory:

find / -name mysql

If it can find the relevant directory using the command: rm -rf {directory name}

Finally, use the command: rpm -qa | grep -i mysql, the system re-check again whether to install mysql.

If centos7, then the default will install a mysql branch product mariadb, you must first uninstall this product branch

rpm -qa | grep mariadb

A copy of the list of found, uninstall one by one, as

rpm -e --nodeps mariadb-libs-5.5.35-3.el7.x86_64

2.安装包处理

新建software目录，切换到software目录,下载到该目录:

mkdir /root/software

cd/root/software

下载:(600M左右,下载需要点时间)

(mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz)
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz

注：问题？

-bash: wget: command not found

然后在执行就可以了，或者可以去官网下载。

官网下载

地址：

https://dev.mysql.com/downloads/mysql/

或者直接找历史版本：https://downloads.mysql.com/archives/community/

国内镜像： http://mirrors.ustc.edu.cn/mysql-ftp/Downloads/MySQL-5.7/

（ps：最简单的是Windows的安装版，选择历史档案左侧的installer就可以选择下载：https://downloads.mysql.com/archives/installer/）

下载完

解压到当前目录:

tar -xzvf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz

mysql主目录处理

在software目录下移动文件到/usr/local/mysql:

mv mysql-5.7.23-linux-glibc2.12-x86_64/usr/local/mysql

cd/usr/local/mysql

mkdir data

主目录权限处理

查看组和用户情况

cat /etc/group | grep mysql
cat /etc/passwd |grep mysql

若存在，则删除原mysql用户：userdel -r mysql，会删除其对应的组和用户。

在查看就会发现没有，说明你已经删掉了

创建mysql组和mysql用户

groupadd mysql
useradd -r -g mysql mysql
chown -R mysql:mysql /usr/local/mysql

创建配置文件及相关目录

修改配置文件：/etc/my.cnf，配置不对的话,后面初始化不全,会拿不到默认密码。

vim /etc/my.cnf

修改内容:

按 Ctrl+C 复制代码

:wq! 保存退出。

创建文件/tmp/mysql.sock：设置用户组及用户，授权

cd /tmp

touch mysql.sock

chown mysql:mysql mysql.sock

chmod 755 mysql.sock

创建文件/tmp/mysqld/mysqld.pid：

mkdir mysqld

cd mysqld

touch mysqld.pid

cd ..

chown -R mysql:mysql mysqld

cd mysqld

chmod 755 mysqld.pid

创建文件/var/log/mysqld.log：

touch /var/log/mysqld.log

chown -R mysql:mysql /var/log

cd log

chmod 755 mysqld.log

配置文件其他参数，仅供参考：https://blog.csdn.net/u011823494/article/details/74548642

安装和初始化数据库

进入bin目录:

cd /usr/local/mysql/bin/

初始化数据库:

./mysqld --initialize --user=mysql --basedir=/usr/local/mysql--datadir=/usr/local/mysql/data

注：

这时会出现错误

./mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

解决方案：

yum install -y libaio

如果是内网不能上网的环境，那么就得手动安装 numactl-2.0.9-2.el6.x86_64.rpm 和 libaio-0.3.109-13.el7.x86_64.rpm 这两个rpm包

rpm -ivh numactl-2.0.9-2.el6.x86_64.rpm

rpm -ivh libaio-0.3.109-13.el7.x86_64.rpm

然后在执行./mysqld --initialize --user=mysql --basedir=/usr/local/mysql--datadir=/usr/local/mysql/data

安全启动:

./mysqld_safe --user=mysql &

是否启动成功，可以通过查看mysql进程，ps -ef | grep mysql

默认密码在mysqld.log日志里, 找到后保存到安全的地方:

cat /var/log/mysqld.log

其中root@localhost: 后面的就是默认密码,后面登录用.(如果找不到可能默认是空,登录时密码直接回车,否则可能安装有问题)

进入bin目录:

cd /usr/local/mysql/bin/

登录mysql:

./mysql -u root -p

拷贝或者输入mysqld.log中获得的默认密码，即可进入mysql命令客户端。

但是，若输入相关命令，则会提示你修改用户密码（注意后面一定要加；）。

show databases;

假设密码修改为xh2018

mysql> set password=password("xh2018");

设置远程登录权限

mysql>grant all privileges on *.* to 'root'@'%' identified by 'xh2018';

立即生效:

mysql> flush privileges;

退出quit 或者 exit;

mysql> quit;

至此，mysql安装流程已结束，后续如果通过远程ip进行root用户授权，还需要到mysql库下的user表中把%对应的root用户所有权限改为Y，否则远程授权会失败，参考：https://blog.csdn.net/nininininiabc222/article/details/80090384。

开机服务启动设置：

把support-files/mysql.server 拷贝为/etc/init.d/mysql：

cp -a /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql