linux之mariadb的安裝

1、概述

　　mysql為關係型資料庫。

       mysql的分支-- mysql (自己本身) -- 2008前後的被SUN收購 SUN之後又被oracle收購

              系統集成--什麼都乾(- 套解決方案)

              mariadb  mysql被收購後，作者為了避免資料庫被壟斷，作者基於mysql的早期版本開發了mariadb

              percona-server  在歐洲，專門mysql資料庫寫手冊，

       postgre SQL　　自己說自己是關係型數據路行業老大的一家公司

       oracle　　最流行的資料庫

       mssql　　微軟資料庫

2、mariadb的安裝

　　（1） 創建用戶

[root@localhost ~]# groupadd mysql
[root@localhost ~]# useradd -r -g mysql -s /sbin/nologin mysql

　　（2）解壓並安裝

[root@localhost ~]# tar xf mariadb-5.5.65-linux-systemd-x86_64.gz 
[root@localhost ~]# mv mariadb-5.5.65-linux-systemd-x86_64 /usr/local/mysql

　　（3）編輯my.cnf文件

[root@localhost mysql]# cp support-files/my-small.cnf /etc/my.cnf
cp: overwrite ‘/etc/my.cnf’? y
[root@localhost mysql]# vim /etc/my.cnf
　　[mysqld]
　　port            = 3306
　　socket          = /tmp/mysql.sock
　　skip-external-locking
　　key_buffer_size = 16K
　　max_allowed_packet = 1M
　　table_open_cache = 4
　　sort_buffer_size = 64K
　　read_buffer_size = 256K
　　read_rnd_buffer_size = 256K
　　net_buffer_length = 2K
　　thread_stack = 240K
　　basedir = /usr/local/mysql
　　datadir = /usr/local/mysql/data
　　innodb_file_per_table=on
　　skip_name_resolve = on
#給mysql用戶許可權
[root@localhost mysql]# chown -R mysql.mysql /usr/local/mysql/
[root@localhost mysql]# chmod -R 755 /usr/local/mysql/

　初始化mysql

[root@localhost mysql]# /usr/local/mysql/scripts/mysql_install_db --user=mysql
Installing MariaDB/MySQL system tables in '/usr/local/mysql/data' ...
190910 12:38:06 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.65-MariaDB) starting as process 12547 ...
OK
Filling help tables...
190910 12:38:06 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.65-MariaDB) starting as process 12556 ...
OK

　將mysql服務添加到init.d中

[root@localhost mysql]# cd support-files/
[root@localhost support-files]# cp -a mysql.server /etc/init.d/mysqld
啟動mysql
[root@localhost support-files]# /etc/init.d/mysqld start 
Starting MariaDB.190910 12:40:15 mysqld_safe Logging to '/usr/local/mysql/data/localhost.localdomain.err'.
190910 12:40:15 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data
. SUCCESS!