求助：安装MySql出错

使用Ubuntu 8.04安装MySql时出错，请各位前辈指点一下，谢谢。

使用的命令是sudo apt-get install mysql-server

错误提示如下：

正在预设定软件包 ...
(正在读取数据库 ... 系统当前总共安装有 170218 个文件和目录。)
正在解压缩 mysql-server-5.0 (从 .../mysql-server-5.0_5.0.51a-3ubuntu5.1_i386.deb) ...
/etc/init.d/mysql: 90: source: not found
/etc/init.d/mysql: 212: my_print_defaults: not found
/etc/init.d/mysql: 215: my_print_defaults: not found
/etc/init.d/mysql: 340: log_failure_msg: not found
invoke-rc.d: initscript mysql, action "stop" failed.
invoke-rc.d returned 127
There is a MySQL server running, but we failed in our attempts to stop it.
Stop it yourself and try again!
dpkg：处理 /var/cache/apt/archives/mysql-server-5.0_5.0.51a-3ubuntu5.1_i386.deb (--unpack)时出错：
子进程 pre-installation script 返回了错误号 1
正在解压缩 mysql-server (从 .../mysql-server_5.0.51a-3ubuntu5.1_all.deb) ...
/etc/init.d/mysql: 90: source: not found
/etc/init.d/mysql: 212: my_print_defaults: not found
/etc/init.d/mysql: 215: my_print_defaults: not found
/etc/init.d/mysql: 340: log_failure_msg: not found
invoke-rc.d: initscript mysql, action "stop" failed.
invoke-rc.d returned 127
There is a MySQL server running, but we failed in our attempts to stop it.
Stop it yourself and try again!
dpkg：处理 /var/cache/apt/archives/mysql-server_5.0.51a-3ubuntu5.1_all.deb (--unpack)时出错：
子进程 pre-installation script 返回了错误号 1
在处理时有错误发生：
/var/cache/apt/archives/mysql-server-5.0_5.0.51a-3ubuntu5.1_i386.deb
/var/cache/apt/archives/mysql-server_5.0.51a-3ubuntu5.1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

好像是有一个MySQL服务了，但是没有相关的进程啊