linux安装MYSQL遇到的问题

####启动MYSQL服务时出现无法创建/var/log/mariadb/mariadb.log

错误信息：

Starting MySQL.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

/usr/local/mysql/bin/mysqld_safe: line 129: /var/log/mariadb/mariadb.log: No such file or directory

/usr/local/mysql/bin/mysqld_safe: line 166: /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

/usr/local/mysql/bin/mysqld_safe: line 129: /var/log/mariadb/mariadb.log: No such file or directory

ERROR! The server quit without updating PID file (/var/lib/mysql/localhost.localdomain.pid).

解决方法：

1 mkdir /var/log/mariadb

2 chmod 700 /var/log/mariadb

####本地连接数据库时出现找不到mysql.sock

错误提示：

Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock

解决：

mysql.sock是一个临时文件,在mysql服务启动时会自动生成

用find命令可以找到mysql.sock文件，只不过不在/tmp目录下而已

[root@localhost /]# find / -name mysql.sock

/var/lib/mysql/mysql.sock

解决方法：

建立软连接到/tmp目录下：

ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock

Linux下安装MySQL5.6