OpenSSH (or Secure SHell) has become a de facto standard for remote access replacing the telnet protocol. However, a default installation of ssh isn’t perfect, and when running an ssh server there are a few simple steps that can dramatically harden an installation.
Install VSFTPD FTP Server for CentOS/Red Hat Linux
Simply type the following command as a superuser (root) to install vsftp server:
# yum install vsftpd
Install and Configure NTP to Synchronize The System Clock for CentOS Linux
Open the terminal or login over the ssh session. You must login as as the root user. Type the following yum command to install ntp
# yum install ntp ntpdate ntp-doc
