引言
现在因为项目的需要在搭建Mysql的集群,从最简单的开始,先安装一个Mysql 在linux系统下。
步骤:
第一步:安装:
tarmysql-5.5.48-linux2.-x86_64.tar.gz
Copy到指定的路径下:
cpmysql-5.5.48-linux2.6-x86_64 /usr/local/mysql -r
添加系统mysql组合mysql用户:
执行命令:groupaddmysql和useradd -r -g mysql mysql
安装数据库:
进入安装mysql软件目录:执行命令 cd/usr/local/mysql
修改当前目录拥有者为mysql用户:执行命令chown -R mysql:mysql ./
安装数据库:执行命令./scripts/mysql_install_db --user=mysql
修改当前目录拥有者为root用户:执行命令chown -R root:root ./
修改当前data目录拥有者为mysql用户:执行命令chown -R mysql:mysql data
到此数据库安装完毕
启动mysql服务和添加开机启动mysql服务:
添加开机启动:执行命令cpsupport-files/mysql.server /etc/init.d/mysql,把启动脚本放到开机初始化目录
启动mysql服务:执行命令servicemysql start
第二步:如何配置mysql:
查看咱们的mysql是否启动成功:
输入:ps -ef | grep mysql
修改mysql的root用户密码,root初始密码为空的:
执行命令:./bin/mysqladmin -u root -h localhost.localdomain password '密码'
把mysql客户端放到默认路径:
ln -s/usr/local/mysql/bin/mysql /usr/local/bin/mysql
注:
当启动客户端的时候,报:
Can't connect tolocal MySQL server through socket '/tmp/mysql.sock' (2)
解决方法:
问题,后来查看了一下咱们的,/etc/my.cnf:
[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid
解决方案:
socket在/var/lib/mysql/mysql.sock路径下,这个时候,我们需要将如链接到mysql.sock到tmp/mysql.sock中就可以了。
注:其实,这个问题很明显了,大家看Socket的参数,在/var/lib/mysql/mysql.sock中,而tcp协议要找的地址为tmp/mysql.sock,所以,我们要不然酱上面的sockket=/tmp/mysql.sock。当然我们都知道,其实,我们只需要软连接到tmp/mysql.sock中就可以了。
我们采用的方法:
另外我们解决windows系统连接不上linux系统的mysql的问题:
这样,我们其实,我们所有对mysql的登陆,都是在mysql中的mysql库中的user表中进行登陆的,这个表中我们windows连接的时候,是这样的'user@host'的,举个简单的例子就是,如果我的电脑的ip为‘192.168.22.28',那么我发出的连接,就是这样的'root@192.168.22.28',这样,因此,我们在修改的时候,host为'%',代表了所有的连接客户端,这个时候,我们只需要对这个的password进行修改就可以了。
但是,我在我的Navicat中连接的时候,发现不能链接上,那么我就要查一下,看看是不是密码不对呀,我们再次查看user表:
我们可以看到,上面我们修改的密码为localhost为‘123456'(这里都是用MD5加密的),但是我们用的是‘%',这个时候,发现两个的密码不同的,这个时候,我们需要查看一下密码是什么,当然,我猜了一下,应该是root,因此,我把navicat的链接密码为‘root',发现能链接上了。。。
大家还可能出现这样的问题:
就是这样的telnet 连接mysql,出现乱码加h_mysql_native_passowrd的问题,这个时候,不要管它就可以了。没有什么影响的。
结论:
我们在做什么事情的时候,都需要去一边思考一边学习,才能让效率更快!
以上就是在Linux系统安装Mysql教程_MySQL的内容,更多相关内容请关注PHP中文网(www.php.cn)!

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