linux安装完mysql后启动错误

redhat as 4,使用rpm包安装完mysql的server 跟client后执行以下命令出错。
[root@ftp etc]# /usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!
提示 以上错误时执行
/usr/local/mysql/bin/mysqld_safe & service mysql start 即可。
（如果你的mysql目录没有安装在/usr/local/mysql下，则执行/usr/bin/mysqld_safe & service mysql start即可）
使用netstat -na查看，发现mysql的3306端口已经启动了
[root@ftp local]# netstat -na
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:32771 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:627 0.0.0.0:* LISTEN
tcp 0 0 :::22 :::* LISTEN
tcp 0 232 ::ffff:222.194.76.37:22 ::ffff:123.233.213.223:1887 ESTABLISHED
udp 0 0 0.0.0.0:1024 0.0.0.0:*
udp 0 0 0.0.0.0:621 0.0.0.0:*
udp 0 0 0.0.0.0:111 0.0.0.0:*
udp 0 0 0.0.0.0:624 0.0.0.0:*