If you received an error when login into AWS EC2 instance or any virual machine using the PEM file, WARNING: UNPROTECTED PRIVATE KEY FILE! Permissions 0644 for 'your_pem_file.pem are too open It is recommended that your private key files are NOT accessible by others.

Installation of the OpenSSH client and server applications is simple. If you want to install OpenSSH server application, and related support files it the Correct way,

Yes, its possible to add host entry to known_hosts automatically without give a yes word.

​If you may get an error Permission Denied Publickey while login into Amazon EC2 server,

The Node.js ssh2 module to provide a simplify the creation of a new SSH connection. For example, the below code is explained to connect and execute a simple command the destination machine. This can support node.js v0.8.7 or newer

This post describes how to connect a Mac OS X using SSH Protocol. The SSH used to directly connect in Linux system, in order to access from a command line, set permissions, copy files, make changes.

Do you want to configure direct root login is allowed to a specific set of ip address, there are two way configure in your sshd config file.