晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/doc/perl-Expect/tutorial/4.A.top
#!/usr/bin/perl
#	This example is a replay of sorts of the rlogin example
#before except in this example we turn control of the process back
#to the user through use of interact().

use Expect;
	
# $Expect::Debug=2;
 $Expect::Exp_Internal=1;

$RSH='/usr/local/bin/ssh';

$host_to_login_to=shift(@ARGV);

# Get the password. We will show how to do this without printing the
# password to the screen later.
print "Enter password: ";
$password=<STDIN>;
chomp $password;



$rsh=Expect->spawn($RSH,$host_to_login_to);

# Look for a password prompt.
$rsh->expect(30,'-re','word:\s$')||(die"Never got password prompt\n");

print $rsh "$password\r";

# Look for a prompt. Prompt can be # $ > or ] followed by a whitespace.
$prompt  = '[\]\$\>\#]\s$';

# Note the use of -re
$rsh->expect(30,'-re',$prompt)||(die "Never got prompt on host\n");

# Start top
print $rsh "exec top\r";

# OK, now return control to user.
$rsh->interact();

haha - 2025