expect命令实现ssh自动登录

#!/usr/bin/expect
set USER [lindex $argv 0]
set IP     [lindex $argv 1]
set PASSWD [lindex $argv 2]

spawn ssh $USER@$IP
expect {
	"*yes/no*" { send "yes\r" }
	"*password:" { send "$PASSWD\r" }
}
interact