在S8下安装mysql，不能运行，请指正

　　安装过程没有出现出错的信息，安装完了， 运行了mysql_install_db 再运行 safe_mysqld,了，出现如下出错信息， Starting mysqld daemon with databases from /usr/mysql/var 020620 14:51:32 mysqld ended 查看mysql目录下var目录下的email.err文件，如下　 020612 11:38:56 mysqld started 020612 11:38:56 /usr/mysql/libexec/mysqld: Can't create/write to file '/usr/mysql/var/email.pid' (Errcode: 13) //主机名为email 020612 11:38:56 /usr/mysql/libexec/mysqld: Can't find file: './mysql/host.frm' (errno: 13) 020612 11:38:56 /usr/mysql/libexec/mysqld: Error on delete of '/usr/mysql/var/email.pid' (Errcode: 13) 020612 11:38:56 mysqld ended 为什么会出现如下情况呢，请高手指正， 要添加mysql用户及组，具体用法如下 shell> ./configure --prefix=/usr/local/mysql shell> make shell> make install shell> scripts/mysql_install_db shell> chown -R root /usr/local/mysql shell> chown -R mysql /usr/local/mysql/var shell> chgrp -R mysql /usr/local/mysql shell> cp support-files/my-medium.cnf /etc/my.cnf shell> /usr/local/mysql/bin/safe_mysqld --user=mysql &