Conectarse por ssh sin usar password (Metodo facil y dificil)

Antes para poner mi public key en una máquina remota, seguía esta guía la que nunca pude memorizar. Hace poco descubrí que hay un método mucho más facil, suponiendo que me quiero conectar al servidor server con el usuario user.

Primero genero mi key pair si no lo tenia (opcional):

$ ssh-keygen -t rsa

despues ejecuto:

$ssh-copy-id user@server

Esta herramienta no verifica que el public key no existiera previamente en el servidor, por lo cual es recomendable no correrlo 2 veces sobre el mismo server.

Comandos útiles para el shell (bash)

CTRL Key Bound

Ctrl + a - Jump to the start of the line
Ctrl + b - Move back a char
Ctrl + c - Terminate the command
Ctrl + d - Delete from under the cursor
Ctrl + e - Jump to the end of the line
Ctrl + f - Move forward a char
Ctrl + k - Delete to EOL
Ctrl + l - Clear the screen
Ctrl + r - Search the history backwards
Ctrl + R - Search the history backwards with multi occurrence
Ctrl + u - Delete backward from cursor
Ctrl + xx - Move between EOL and current cursor position
Ctrl + x @ - Show possible hostname completions
Ctrl + z - Suspend/ Stop the command

ALT Key Bound

Alt + < - Move to the first line in the history
Alt + > - Move to the last line in the history
Alt + ? - Show current completion list
Alt + * - Insert all possible completions
Alt + / - Attempt to complete filename
Alt + . - Yank last argument to previous command
Alt + b - Move backward
Alt + c - Capitalize the word
Alt + d - Delete word
Alt + f - Move forward
Alt + l - Make word lowercase
Alt + n - Search the history forwards non-incremental
Alt + p - Search the history backwards non-incremental
Alt + r - Recall command
Alt + t - Move words around
Alt + u - Make word uppercase
Alt + back-space - Delete backward from cursor

More Special Keybindings

Here "2T" means Press TAB twice

$ 2T - All available commands(common)
$ (string)2T - All available commands starting with (string)
$ /2T - Entire directory structure including Hidden one
$ 2T - Only Sub Dirs inside including Hidden one
$ *2T - Only Sub Dirs inside without Hidden one
$ ~2T - All Present Users on system from "/etc/passwd"
$ $2T - All Sys variables
$ @2T - Entries from "/etc/hosts"
$ =2T - Output like ls or dir

(Este post es más que nada un placeholder, pienso reformatearlo un poco, porque es un robo a mano armada de este link http://linuxhelp.blogspot.com/2005/08/bash-shell-shortcuts.html - La idea es agregar las cosas de los otros links:

http://www.ice2o.com/bash_quick_ref.html
http://hajek.stat.ubc.ca/~harry/local/bash.html
http://nubyonrails.com/articles/useful-shell-shortcuts
http://articles.techrepublic.com.com/5100-10877-5827311.html )