mysql怎么回事？请大家帮忙！

#mysql
ERROR 2002: Can't connect to local MySQL server through socket  '/var/lib/mysql/mysql.sock' (111)

#./safe_mysqld -u root &
[1] 5094
bash: ./safe_mysqld: No such file or directory
[1]+  Exit 127                ./safe_mysqld -u root

#/usr/share/mysql/mysql.server start
Starting mysqld daemon with databases from /var/lib/mysql
020118 14:28:23  mysqld ended

然后查看日志：
020118 14:29:07  mysqld started
020118 14:29:07  /usr/libexec/mysqld: Can't find file: './mysql/host.frm' (errno
: 13)
020118 14:29:07  mysqld ended

我的系统是7.1，装的是光盘上的mysql程序。请教大家。


　　　　　　

要先初始话数据库
mysqld_install_db　　　　　　

# scripts/mysql_install_db
bash: scripts/mysql_install_db: No such file or directory

这又是怎么回事？　　　　　　

查看文件路径和熟性确定是否正确