再次查看，现在使用的配置文件已经为默认配置的值了（可与之前的进程捕捉到的路径做对比），RPM包安装MySQL默认的data路径是/var/lib/mysql，bin log和error log默认也都是放在这里的
二、安装MySQL客户端
由于之前已经装了5.5.39的二进制MySQL，如果不安装5.0.96的客户端，而直接使用原来的客户端也是可以的，那么就是通过5.5.39的客户端去连接5.0.96的服务器
[root@bak ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.0.96-community-log MySQL Community Edition (GPL)
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> \s
--------------
mysql Ver 14.14 Distrib 5.5.39, for linux2.6 (i686) using readline 5.1
Connection id: 1
Current database:
Current user: root@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.0.96-community-log MySQL Community Edition (GPL)
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: latin1
Db characterset: latin1
Client characterset: utf8
Conn. characterset: utf8
UNIX socket: /var/lib/mysql/mysql.sock
Uptime: 1 min 5 sec
Threads: 1 Questions: 4 Slow queries: 0 Opens: 12 Flush tables: 1 Open tables: 6 Queries per second avg: 0.062
--------------
mysql>
连接很顺利，红色部分清楚地显示了客户端和服务器端的版本号，如果在没有安装过MySQL客户端的系统上执行mysql，会提示找不到命令，我的目的是想安装5.0.96自己的客户端，然后连接到服务器
[root@bak ~]# rpm -ivh /opt/MySQL-client-community-5.0.96-1.rhel5.i386.rpm
Preparing... ########################################### [100%]
1:MySQL-client-community ########################################### [100%]
[root@bak ~]#
为了不让原来的��本对5.0.39产生干扰，我把原来属于5.5.39的软链先删掉
[root@bak ~]# cd /usr/local
[root@bak local]# ll
total 72
drwxr-xr-x 2 mysql 502 4096 Aug 25 11:39 bin
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 etc
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 games
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 include
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 lib
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 libexec
lrwxrwxrwx 1 root root 38 Oct 17 14:56 mysql -> /opt/mysql/mysql-5.5.39-linux2.6-i686/
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 sbin
drwxr-xr-x 5 mysql 502 4096 Aug 25 11:39 share
drwxr-xr-x 2 mysql 502 4096 Sep 23 20:34 src
[root@bak local]# unlink mysql
[root@bak local]# ll
total 72
drwxr-xr-x 2 mysql 502 4096 Aug 25 11:39 bin
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 etc
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 games
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 include
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 lib
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 libexec
drwxr-xr-x 2 mysql 502 4096 Aug 8 2008 sbin
drwxr-xr-x 5 mysql 502 4096 Aug 25 11:39 share
drwxr-xr-x 2 mysql 502 4096 Sep 23 20:34 src
[root@bak local]#