quanweiru: mysql-commercial-client-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-common-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-devel-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-embedded-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-embedded-devel-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-libs-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-libs-compat-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-server-5.7.20-1.1.el6.x86_64.rpm mysql-commercial-test-5.7.20-1.1.el6.x86_64.rpm -rw-r--r--. 1 mysql mysql 21761 Oct 13 18:54 README.txt [root@localhost tmp]# yum -y install perl-JSON [root@localhost V971105-01]# rpm -ivh ./*.rpm [root@localhost V971105-01]# service mysqld start Initializing MySQL database: [FAILED]