文章目錄

• • • • • 一、下載安裝
        • • 2. wget 下載方式
          • 3. 安裝
          • 4. 初始化數據庫
        • 二、修改密碼
        • • 2.1. 修改密碼
          • 2.2. 修改密碼
          • 2.3. 允許遠程訪問
          • 2.4. 關閉防火墻
          • 2.4. 建立mysql軟連接

一、下載安裝

下載地址：https://dev.mysql.com/downloads/mysql/5.7.html#downloads

下載地址：
https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz

2. wget 下載方式

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz

3. 安裝

# 解壓 tar -zxvf mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz# 再移動并重命名一下 mv mysql-5.7.34-linux-glibc2.12-x86_64 /usr/local/mysql# 創建mysql用戶組和用戶并修改權限 groupadd mysql useradd -r -g mysql mysql# 創建數據目錄并賦予權限 mkdir -p /data/mysql chown mysql:mysql -R /data/mysql # 配置my.cnf vim /etc/my.cnf

內容如下（原內容清空即可）：

[mysqld] bind-address=0.0.0.0 port=3306 user=mysql basedir=/usr/local/mysql datadir=/data/mysql socket=/tmp/mysql.sock log-error=/data/mysql/mysql.err pid-file=/data/mysql/mysql.pid #character config character_set_server=utf8mb4 symbolic-links=0 explicit_defaults_for_timestamp=true

4. 初始化數據庫

# 進入mysql的bin目錄 cd /usr/local/mysql/bin/# 初始化 ./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql/ --datadir=/data/mysql/ --user=mysql --initialize# 查看密碼 cat /data/mysql/mysql.err# 先將mysql.server放置到/etc/init.d/mysql中 cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql# 啟動 service mysql start# 查看進程 ps -ef|grep mysql到這里說明mysql已經安裝成功了！！

操作記錄：

[root@localhost app]# tar -zxvf mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz [root@localhost app]# mv mysql-5.7.34-linux-glibc2.12-x86_64 /usr/local/mysql [root@localhost app]# groupadd mysql [root@localhost app]# useradd -r -g mysql mysql [root@localhost app]# mkdir -p /data/mysql #創建目錄 [root@localhost app]# chown mysql:mysql -R /data/mysql #賦予權限 [root@localhost app]# vim /etc/my.cnf [root@localhost app]# cd /usr/local/mysql/bin/ [root@localhost bin]# ./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql/ --datadir=/data/mysql/ --user=mysql --initialize [root@localhost bin]# cat /data/mysql/mysql.err 2021-06-23T12:10:13.135921Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2021-06-23T12:10:13.310540Z 0 [Warning] InnoDB: New log files created, LSN=45790 2021-06-23T12:10:13.354777Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2021-06-23T12:10:13.455013Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: f6c9acb5-d41b-11eb-af0b-000c293777d6. 2021-06-23T12:10:13.457378Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2021-06-23T12:10:14.122833Z 0 [Warning] CA certificate ca.pem is self signed. 2021-06-23T12:10:14.491356Z 1 [Note] A temporary password is generated for root@localhost: wevML>n_q8=; [root@localhost bin]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql [root@localhost bin]# service mysql start Starting MySQL. SUCCESS! [root@localhost bin]# ps -ef|grep mysql root 3583 1 0 20:11 pts/0 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/mysql.pid mysql 3774 3583 3 20:11 pts/0 00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/mysql.err --pid-file=/data/mysql/mysql.pid --socket=/tmp/mysql.sock --port=3306 root 3806 3157 0 20:12 pts/0 00:00:00 grep --color=auto mysql

二、修改密碼

2.1. 修改密碼

# 首先登錄mysql cd /usr/local/mysql/bin/ ./mysql -u root -p 輸入密碼：(前面的那個是隨機生成的)

2.2. 修改密碼

# 再執行下面三步操作，然后重新登錄。 SET PASSWORD = PASSWORD('123456'); ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER; FLUSH PRIVILEGES;

2.3. 允許遠程訪問

# 這時候你如果使用遠程連接……你會發現你無法連接。 use mysql #訪問mysql庫 update user set host = '%' where user = 'root'; #使root能再任何host訪問 FLUSH PRIVILEGES; #刷新

2.4. 關閉防火墻

systemctl stop firewalld

ok！！！！MySQL5.7就裝好了

2.4. 建立mysql軟連接

如果不希望每次都到bin目錄下使用mysql命令則執行以下命令

ln -s /usr/local/mysql/bin/mysql /usr/bin

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