The program 'mysqld' can be found in the following packages:

The program 'mysql' can be found in the following packages:
* mysql-server-core-5.1
* mysql-cluster-server-5.1
* mysql-server-core-5.0
Try: apt-get install <selected package>

并不是真的错误而不错

是因为编译安装mysql的

mysql/bin目录没有添加到path里面

所以要cd 到mysql/bin目录下然后 ./mysql  或者 .bin/mysql -uroot -p