root@sun-virtual-machine:/opt# mkdir /mydata/data -pv
root@sun-virtual-machine:/opt# groupadd -r MysqL
root@sun-virtual-machine:/opt# useradd -g MysqL -r -s /sbin/nologin -M -d /mydata/data MysqL
-r,--system 创建一个系统账户
-s,--shell SHELL新账户的登录 shell
-M,--no-create-home不创建用户的主目录
-d,--home-dir HOME_DIR 新账户的主目录
-g,--gid GROUP新账户主组的名称或 ID
root@sun-virtual-machine:/# chown -R MysqL:MysqL /mydata/data
root@sun-virtual-machine:/# tar xf /root/mariadb-10.0.28-linux-glibc_214-x86_64.tar.gz -C /usr/local
root@sun-virtual-machine:/# cd /usr/local
root@sun-virtual-machine:/usr/local# ln -sv mariadb-10.0.28-linux-x86_64 MysqL
root@sun-virtual-machine:/usr/local/MysqL# cd MysqL
root@sun-virtual-machine:/usr/local/MysqL# chown -R MysqL:MysqL .
root@sun-virtual-machine:/usr/local/MysqL# apt-get install libaio-dev 安装之后才能初始化成功 否则报错缺少它
root@sun-virtual-machine:/usr/local/MysqL# scripts/MysqL_install_db --user=MysqL --datadir=/mydata/data
root@sun-virtual-machine:/usr/local/MysqL# chown -R root .
root@sun-virtual-machine:/usr/local/MysqL# cp support-files/my-large.cnf /etc/my.cnf
并修改此文件中thread_concurrency的值为你的cpu个数乘以2，比如这里使用如下行：
thread_concurrency = 2
datadir = /mydata/data
root@sun-virtual-machine:/usr/local/MysqL# cp support-files/MysqL.server /etc/init.d/MysqLd
root@sun-virtual-machine:/usr/local/MysqL# chmod +x /etc/init.d/MysqLd
root@sun-virtual-machine:/usr/local/MysqL# /lib/systemd/systemd-sysv-install enable MysqLd
root@sun-virtual-machine:/usr/local/MysqL# systemctl start MysqLd
在开机时启用一个服务：systemctl enable postfix.service
在开机时禁用一个服务：systemctl disable postfix.service
查看服务是否开机启动：systemctl is-enabled postfix.service
查看已启动的服务列表：systemctl list-unit-files|grep enabled查看启动失败的服务列表：systemctl --Failed
