echo password | ssh id@server

$ ssh-keygen -t rsa -b 2048
Generating public/private rsa key pair.
Enter file in which to save the key (/home/username/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/username/.ssh/id_rsa.
Your public key has been saved in /home/username/.ssh/id_rsa.pub.

$ ssh-copy-id id@server
id@server's password:

.ssh/authorized_keys

$ ssh id@server

id@server:~$

$ sudo apt-get install sshpass
$ sshpass -p your_password ssh user@hostname

# ssh-keygen

# ssh-copy-id hostname

# ssh hostname

#!/usr/bin/expect -f
#  ./ssh.exp password 192.168.1.11 id
set pass [lrange $argv 0 0]
set server [lrange $argv 1 1]
set name [lrange $argv 2 2]

spawn ssh $name@$server
match_max 100000
expect "*?assword:*"
send -- "$passr"
send -- "r"
interact

# ./1.ex password localhost ooshro
spawn ssh ooshro@localhost
ooshro@localhost's password:
Linux ubuntu-1010-server-01 2.6.35-25-generic-pae #44-Ubuntu SMP Fri Jan 21 19:01:46 UTC 2011 i686 GNU/Linux
Ubuntu 10.10

Welcome to Ubuntu!
 * Documentation:  https://help.ubuntu.com/
Last login: Tue Mar  1 12:41:12 2011 from localhost

#!/usr/bin/perl
use warnings;
use strict;

use Net::SSH::Perl;
my $host = 'remote.serv.er';
my $user = 'root';
my $pass = 'hunter2';
my $ssh = Net::SSH::Perl->new('$host');
$ssh->login('$user', '$pass') or die "Oh noes! $!";