auto_login

#!/usr/bin/expect -f 
set timeout 20  
  
if { [llength $argv] < 1} {  
    puts "Usage:"  
    puts "$argv0 ip username passwd"  
    exit 1
}  
  
set ip [lindex $argv 0]  
set username [lindex $argv 1]  
set passwd [lindex $argv 2]
  
set passwderror 0
  
spawn ssh $username@$ip
expect {
        "*assword*"
        {
            send "$passwd\n";
        }
        "*es/no*"
        {
              send "yes\n";
              exp_continue;
        }
    }
interact