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本文测试版本：Ubuntu 14.04
由此可以看出系统中并没有安装mysql，执行以下命令进行安装。
hadoop@master:~$ sudo apt-get install mysql-server
正在读取软件包列表... 完成
正在分析软件包的依赖关系树
正在读取状态信息... 完成
将会安装下列额外的软件包：
libdbd-mysql-perl libdbi-perl libhtml-template-perl libmysqlclient18
libterm-readkey-perl mysql-client-5.5 mysql-common mysql-server-5.5
mysql-server-core-5.5
建议安装的软件包：
libmldbm-perl libnet-daemon-perl libplrpc-perl libsql-statement-perl
libipc-sharedcache-perl tinyca mailx
下列【新】软件包将被安装：
libdbd-mysql-perl libdbi-perl libhtml-template-perl libmysqlclient18
libterm-readkey-perl mysql-client-5.5 mysql-common mysql-server
mysql-server-5.5 mysql-server-core-5.5
升级了 0 个软件包，新安装了 10 个软件包，要卸载 0 个软件包，有 158 个软件包未被升级。
需要下载 8,343 kB 的软件包。
解压缩后会消耗掉 86.8 MB 的额外空间。
您希望继续执行吗？ [Y/n]
输入Y进入到安装界面，在安装过程中，会弹出一个界面要求输入mysql的root的密码，这里一定输入，省得安装后再设密码了。
再次输入密码：
获取：1 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main mysql-common all 5.5.38-0ubuntu0.14.04.1 [14.1 kB]
获取：2 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libmysqlclient18 i386 5.5.38-0ubuntu0.14.04.1 [592 kB]
获取：3 http://us.archive.ubuntu.com/ubuntu/ trusty/main libdbi-perl i386 1.630-1 [881 kB]
获取：4 http://us.archive.ubuntu.com/ubuntu/ trusty/main libdbd-mysql-perl i386 4.025-1 [99.6 kB]
获取：5 http://us.archive.ubuntu.com/ubuntu/ trusty/main libterm-readkey-perl i386 2.31-1 [27.2 kB]
获取：6 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main mysql-client-5.5 i386 5.5.38-0ubuntu0.14.04.1 [1,433 kB]
获取：7 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main mysql-server-core-5.5 i386 5.5.38-0ubuntu0.14.04.1 [3,135 kB]
获取：8 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main mysql-server-5.5 i386 5.5.38-0ubuntu0.14.04.1 [2,082 kB]
获取：9 http://us.archive.ubuntu.com/ubuntu/ trusty/main libhtml-template-perl all 2.95-1 [65.5 kB]
获取：10 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main mysql-server all 5.5.38-0ubuntu0.14.04.1 [12.4 kB]
下载 8,343 kB，耗时 49秒 (168 kB/s)
正在预设定软件包 ...
Selecting previously unselected package mysql-common.
(正在读取数据库 ... 系统当前共安装有 212184 个文件和目录。)
Preparing to unpack .../mysql-common_5.5.38-0ubuntu0.14.04.1_all.deb ...
Unpacking mysql-common (5.5.38-0ubuntu0.14.04.1) ...
Selecting previously unselected package libmysqlclient18:i386.
Preparing to unpack .../libmysqlclient18_5.5.38-0ubuntu0.14.04.1_i386.deb ...
Unpacking libmysqlclient18:i386 (5.5.38-0ubuntu0.14.04.1) ...
Selecting previously unselected package libdbi-perl.
Preparing to unpack .../libdbi-perl_1.630-1_i386.deb ...
Unpacking libdbi-perl (1.630-1) ...
Selecting previously unselected package libdbd-mysql-perl.
Preparing to unpack .../libdbd-mysql-perl_4.025-1_i386.deb ...
Unpacking libdbd-mysql-perl (4.025-1) ...
Selecting previously unselected package libterm-readkey-perl.
Preparing to unpack .../libterm-readkey-perl_2.31-1_i386.deb ...
Unpacking libterm-readkey-perl (2.31-1) ...
Selecting previously unselected package mysql-client-5.5.
Preparing to unpack .../mysql-client-5.5_5.5.38-0ubuntu0.14.04.1_i386.deb ...
Unpacking mysql-client-5.5 (5.5.38-0ubuntu0.14.04.1) ...
Selecting previously unselected package mysql-server-core-5.