B、因为在新安装完的SUSE 12.2系统中，原本已有MySQL5.5.25a版本的MySQL，建议清除（本次安装是已清除原有Mysql5.5.25版本后的安装过程），不过也可以在安装过程中覆盖它。按照MySQL官网文档叙述，如果需要在本地登录，则需安同时装MySQL-server和MySQL-client：
rpm -ivh MySQL-server-5.6.13-1.sles11.x86_64.rpm
rpm -ivh MySQL-client-5.6.13-1.sles11.x86_64.rpm
C、安装完成后，你可以在目录/usr下找到my.cnf,不过这个my.cnf没什么内容，下面配置一下my.cnf,该配置仅作参考使用。
[plain] # The following options will be passed to all MySQL clients [client] #password = your_password port = 3306 socket = /opt/mysql/mysql.sock # Here follows entries for some specific programs # The MySQL server [mysqld] port = 3306 socket = /opt/mysql/mysql.sock # Change following line if you want to store your database elsewhere basedir=/usr datadir = /opt/mysql skip-external-locking key_buffer_size = 16M max_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M lower_case_table_names=1
# Don’t listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the “enable-named-pipe” option) will render mysqld useless!
# #skip-networking # Replication Master Server (default) # binary logging is required for replication log-bin=mysql-bin # binary logging format - mixed recommended binlog_format=mixed # required unique id between 1 and 2^32 - 1 # defaults to 1 if master-host is not set # but will not function as a master if omitted server-id = 1 # Replication Slave (comment out master section to use this) # # To configure this host as a replication slave, you can choose between # two methods : # # 1) Use the CHANGE MASTER TO command (fully described in our manual) - # the syntax is: # # CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=, # MASTER_USER=, MASTER_PASSWORD= ; # # where you replace , , by quoted strings and # by the master's port number (3306 by default). # # Example: # # CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306, # MASTER_USER='joe', MASTER_PASSWORD='secret'; # # OR #
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables’ values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
# # required unique id between 2 and 2^32 - 1 # (and different from the master) # defaults to 2 if master-host is set # but will not function as a slave if omitted #server-id = 2 # # The replication master for this slave - required #master-host = # # The username the slave will use for authentication when connecting # to the master - required #master-user = # # The password the slave will authenticate with when connecting to # the master - required #master-password = # # The port the master is listening on. # optional - defaults to 3306 #master-port = # # binary logging - not required for slaves, but recommended #log-bin=mysql-bin # Uncomment the following if you are using InnoDB tables innodb_data_home_dir = /opt/mysql innodb_data_file_path = ibdata1:10M:autoextend innodb_log_group_home_dir = /opt/mysql # You can set .._buffer_pool_size up to 50 - 80 % # of RAM but beware of setting memory usage too high innodb_buffer_pool_size = 16M #innodb_additional_mem_pool_size = 2M # Set .._log_file_size to 25 % of buffer pool size innodb_log_file_size = 5M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 1 #innodb_lock_wait_timeout = 50 # The safe_mysqld script [safe_mysqld] log-error = /var/log/mysql/mysqld.log socket = /opt/mysql/mysql.sock [mysqldump] socket = /opt/mysql/mysql.sock quick max_allowed_packet = 16M [mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates [myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout [mysqld_multi] mysqld = /usr/bin/mysqld_safe mysqladmin = /usr/bin/mysqladmin log = /var/log/mysqld_multi.log
D、从给出的配置文件可以看到几个信息与默认的不一样
1、basedir路径的配置
2、datadir路径的配置
3、[client] socket路径的配置
4、[mysqld] socket路径的配置
5、[safe_mysqld] socket路径的配置
6、[mysqldump] socket路径的配置
由于datadir路径配置为“/opt/mysql”，则需要把默认路径”/var/lib”下整个”mysql”文件夹复制到”/opt”下。以下是需要特别注意的地方：先查看一下”/var/lib”下”mysql”的权限和所有者；发现该文件夹的所有者为mysql。再查看”/opt”下刚才复制的”mysql”文件夹所有者，发现该所有者是root,此时如果启动mysql服务，会报错误：StartingMySQL.The server quit without updating PID file。修改”/opt”目录下的”mysql”文件夹所有者：
/opt>chown -R mysql:mysql mysql
注意：[client] socket路径的配置、[mysqld] socket路径的配置、[safe_mysqld] socket路径的配置、[mysqldump] socket路径的配置，都是配置在”/opt/mysql”下。否则会报没有找到mysql.sock错误。
启动mysql服务：service mysql start
查看mysql服务状态：service mysql status
发现一切正常，利用安装时随机生成的root密码（在`/.mysql_secret中）登陆，修改root密码或添加新用户。
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