系统：CentOS release 5.5 (Final) 64位机器从网上下了mysql5.1.51的source源码还有一个安装的视频
跟着一步步做下来，最后安装好了，
netstat -tnl可以看到3306在监听执行这个命令：#mysql -u root进不去mysql直接退出了
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.51-log Source distributionCopyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL v2 licenseSegmentation fault
BTW:echo $? 执行结果是127
Your MySQL connection id is 2
Server version: 5.1.51-log Source distribution看起来已经登陆上了呀。