Centos problem highlights

Centos FAQ 1. Why can't the newly installed centos system be connected using tools such as xshell and putty? Cause: The sshd service is not started. Solution: 1) run the command rpm-qa | grepssh to check whether ssh2 is installed.) use servicesshdstatus to check whether the service is installed... centos FAQ 1. Why can't the newly installed centos system be connected using tools such as xshell and putty? Cause: The sshd service is not started. Solution: 1) run the command rpm-qa | grep ssh to check whether ssh has been installed. 2) run the service sshd status command to check whether the service has been started. 3) if it has not been started: service sshd start or/etc/init. d/sshd start can be connected after startup. Set boot start: chkconfig -- add sshd and enable chkconfig sshd on