Gérer ses clés ssh/en


 * Installation of the open-ssh client:
 * Generation of a pair of public and private keys.
 * A series of questions are asked to you:
 * The name of the file where to save the key: the choice by default is very well.
 * A password to block the access to the private key: compulsory but recommended.
 * Copy of the public key to the servers: