安裝記錄：    1、首先建立一個目錄用於存放解壓的Mysql目錄（可以使用原目錄名，但是建議新建目錄，這樣方便管理和配置）：      mkdir -p /opt/mysql 2、建立使用者 [[email protected] home]# groupadd mysql [[email protected] home]# useradd mysql -g mysql 修改mysql安裝目錄（這裡是/opt/mysql ）的許可權：      chown -R mysql:mysql /opt/mysql      此外也可以使用以下的語句，兩者效果一樣，只不過上面的語句更簡單;      [

[email protected] mysql]# chown -R mysql .      [[email protected] mysql]# chgrp -R mysql . 3、 初始化mysql並啟動mysql服務 由於 mysql5.7新特性， mysql_install_db 已經不再推薦使用了，建議改成 mysqld –initialize 完成例項初始化。 注意下面語句中的--basedir和--datadir兩個引數的值，必須與mysql的安裝路徑一致，此外如果 --datadir中如果已經有資料，在初始化時會報錯，此時需要將之前的 --datadir

中的資料清空，之後在初始化 [[email protected] mysql]# cd /optmysql/bin [[email protected] bin]# ./mysqld --user=mysql --basedir=/opt/mysql --datadir=/opt/mysql/data --initialize 顯示如下：隨機密碼 ,一定要記住該密碼！！！！！！ 2016-11-26T20:29:03.612269Z 1 [Note] A temporary password is generated for [email protected]: 9Kt9>u95ha%s 4、 嘗試啟動Mysql服務 ，

support-files/mysql.server start 通常情況下會報錯： [[email protected] mysql]# /opt/mysql/support-files/mysql.server start support-files/mysql.server: line 271: cd: /usr/local/mysql: No such file or directory Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_safe) 5、 如果報上述錯誤，需要修改support-files下mysql.server檔案， 修改配置檔案：將66-73行/usr/local/修改為/home/ vim   /opt/mysql/support-files/mysql.server 然後重新開啟mysq ：/opt/mysql/support-files/mysql.server start 6、關閉selinux： vim /etc/selinux/config 解決方法：關閉它，開啟/etc/selinux/config，把SELINUX=enforcing改為SELINUX=disabled後存檔退出 如果重啟Mysql仍然報錯，重啟機器試試 7、將mysql的啟動時讀取的系統配置檔案改掉： mysql在啟動時沒有指定配置檔案時會使用/etc/my.cnf配置檔案 ，故需要將其修改使Mysql無法讀取到該檔案 修改配置檔案的名稱：mv /etc/my.cnf /etc/my.cnf.old 8、重啟服務 /opt/mysql/support-files/mysql.server start 若服務已經啟動可以使用以下語句找到mysql並將其kill掉：      ps -ef | grep mysql 9\登入： /opt/mysql/bin/mysql -uroot -p 之後 修改密碼： set password=password('youpassword'); 10、檢視有哪些使用者 use mysql； select Host,User from user; 給許可權： GRANT ALL PRIVILEGES ON *.* TO [email protected]'%' identified by 'youpassword'; flush privileges; 11\ 建立使用者：     CREATE USER 'oozie'@'%' IDENTIFIED BY 'oozie';     許可權：     GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;     GRANT ALL PRIVILEGES ON *.* TO 'oozie'@'%' IDENTIFIED BY 'oozie' WITH GRANT OPTION; 問題記錄： [email protected] support-files]# ./mysql.server start Starting MySQL./opt/mysql/bin/mysqld_safe: line 548: /var/lib/mysql/mysqld_safe.pid: No such file or directory awk: (FILENAME=- FNR=1) warning: error writing standard output (Broken pipe) .touch: cannot touch ‘/var/log/mariadb/mariadb.log’: No such file or directory chmod: cannot access ‘/var/log/mariadb/mariadb.log’: No such file or directory touch: cannot touch ‘/var/log/mariadb/mariadb.log’: No such file or directory chown: cannot access ‘/var/log/mariadb/mariadb.log’: No such file or directory /opt/mysql/bin/mysqld_safe: line 135: /var/log/mariadb/mariadb.log: No such file or directory /opt/mysql/bin/mysqld_safe: line 169: /var/log/mariadb/mariadb.log: No such file or directory touch: cannot touch ‘/var/log/mariadb/mariadb.log’: No such file or directory chown: cannot access ‘/var/log/mariadb/mariadb.log’: No such file or directory chmod: cannot access ‘/var/log/mariadb/mariadb.log’: No such file or directory /opt/mysql/bin/mysqld_safe: line 135: /var/log/mariadb/mariadb.log: No such file or directory  ERROR! The server quit without updating PID file (/var/lib/mysql/slave02.yscredit.com.pid). --------------------------------------------------------------------------------------------------  解決：  mysql在啟動時沒有指定配置檔案時會使用/etc/my.cnf配置檔案，請開啟這個檔案檢視在[mysqld]節下有沒有指定資料目錄(datadir)。 解決方法：請在[mysqld]下設定這一行：datadir = /usr/local/mysql/data     原配置檔案中內容如下： [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 # !includedir /etc/my.cnf.d 修改過後： [mysqld] datadir=/opt/mysql socket=/opt/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=/opt/mysql/log/mariadb/mariadb.log pid-file=/opt/mysql/mariadb/mariadb.pid # # include all files from the config directory # !includedir /etc/my.cnf.d ================================================================================================= 之後啟動mysql： [[email protected] support-files]# ./mysql.server start Starting MySQL.... ERROR! The server quit without updating PID file (/opt/mysql/slave02.yscredit.com.pid). 依然報錯。 此時解決： selinux惹的禍，如果是centos系統，預設會開啟selinux 解決方法：關閉它，開啟/etc/selinux/config，把SELINUX=enforcing改為SELINUX=disabled後存檔退出重啟機器試試。 同時：參考https://www.justin.my/2012/03/starting-mysql-error-the-server-quit-without-updating-pid-file Sometimes you may see this error in your server. But don’t panic, just rename or move away the /etc/my.cnf in your server, and try to restart the MySQLd again. [[email protected]:～ ] $ service mysqld start Starting MySQL... ERROR! The server quit without updating PID file (/var/lib/mysql/server.pelayan.com.pid). [[email protected]:～ ] $ mv /etc/my.cnf /etc/my.cnf.old [[email protected]:～ ] $ service mysqld restart Shutting down MySQL.... SUCCESS! Starting MySQL.. SUCCESS! [[email protected]:～ ] $