SSH Tectia Server for IBM z/OS always installs under /opt/tectia, so the SSH Tectia and OpenSSH binaries can coexist in the system. The SSH Tectia configuration files and host keys are stored in the /opt/tectia/etc directory, whereas OpenSSH uses the /etc/ssh directory. The SSH Tectia user keys and other user-specific files are stored under $HOME/.ssh2, whereas OpenSSH uses $HOME/.ssh. The server port can be configured in the /opt/tectia/etc/sshd2_config file with the keyword Port. The default port number is 22, but it can be changed to any available port.