Essentially, the process involves altering a few configuration files. Running the ssh as a process on the UNIX server ssh can be made to start up in several different ways. Only the owner should have the private key. The public key is available to anyone. Data are encrypted with public key.
Decryption is possible only with the private key.
The private key is encrypted with the passphrase in case of file system security breach. Make sure that each of the keys occupy only a single line in the file. These files will allow correct encryption of data. The files are authorization and identification . The private key should be saved only on the local host.