My ugly blog.

I can't help it, I think this is cool :)

Welcome. You've reached the central repository for cheat, the RubyGem which puts cheat sheets right into your terminal. The inaugural blog entry is here.

Get started:

$ sudo gem install cheat
$ cheat strftime

A magnificent cheat sheet for Ruby's strftime method will be printed to your terminal.

To get some help on cheat itself:

$ cheat cheat

How meta.

Cheat sheets are basically wiki pages accessible from the command line. You can browse, add, or edit cheat sheets. Try to keep them concise. For a style guide, check out the cheat cheat sheet.

To access a cheat sheet, simply pass the program the desired sheet's name:

$ cheat <sheet name>

From Wikipedia, the free encyclopedia

The Hardest Logic Puzzle Ever is a title coined by American philosopher and logician George Boolos in an article published in The Harvard Review of Philosophy (an Italian translation was published earlier in the newspaper La Repubblica, under the title L'indovinello più difficile del mondo) for the following Raymond Smullyan inspired logic puzzle:

“

Three gods A, B, and C are called, in some order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a completely random matter. Your task is to determine the identities of A, B, and C by asking three yes-no questions; each question must be put to exactly one god. The gods understand English, but will answer all questions in their own language, in which the words for yes and no are 'da' and 'ja', in some order. You do not know which word means which.

”

Boolos provides the following clarifications:^[1]

“

It could be that some god gets asked more than one question (and hence that some god is not asked any question at all). What the second question is, and to which god it is put, may depend on the answer to the first question. (And of course similarly for the third question.) Whether Random speaks truly or not should be thought of as depending on the flip of a coin hidden in his brain: if the coin comes down heads, he speaks truly; if tails, falsely. Random will answer 'da' or 'ja' when asked any yes-no question.[1]

”

This almost made my head explode. Try solving it without reading the solution. Good luck!

Algorithm

So wait a second. How do we do it? Doesn't Ruby have poor support for AST introspection? Well, yes, it does, so we cheat: we figure out what file and line the assert block is defined in, then open the file, read the code, and parse it directly using Ryan Davis' amazing RubyParser and Ruby2Ruby. You can bask in the kludge by examining chunk.rb and assert.rb. If you find some code it can't parse, please send it our way.

Before you get your knickers in a twist about how this is totally unacceptable because it doesn't support this or that use case, here are our caveats and excuses:

• It works! Tested in 1.8.6, 1.8.7, 1.9.1, and 1.9.2-rc2. (Thank you, rvm!)
• Your code needs to be in a file. That means it doesn't work in IRB. (If you're developing Ruby code without saving it to a mounted disk, then sorry, Wrong is not right for you.)
• It's a development-time testing library, not a production runtime library, so there are no security or filesystem issues.
• eval isn't evil, it's just misunderstood.
• It makes a few assumptions about the structure of your code, leading to some restrictions:
  • You can't have more than one call to assert per line. (This should not be a problem since even if you're nesting asserts for some bizarre reason, we assume you know where your Return key is. And actually, technically you can put two asserts on a line, but it always describes the first one it sees, which means that if the second one executes, its failure message will be incorrect or broken.)
  • You can't use metaprogramming to write your assert blocks.
  • All variables and methods must be available in the binding of the assertion block.

This is a very slick hack. I'm gonna go play with this.

Metric	ID	Date Public	Name
142.5	VU#191609	03/29/2007	Microsoft Windows animated cursor stack buffer overflow
108.16	VU#16532	11/10/1999	BIND T_NXT record processing may cause buffer overflow
104.73	VU#41870	04/03/1999	Sun Solstice AdminSuite ships with insecure default configuration
99	VU#945216	02/08/2001	SSH CRC32 attack detection code contains remote integer overflow
94.5	VU#254236	09/10/2003	Microsoft Windows RPCSS Service contains heap overflow in DCOM request filename handling
94.5	VU#483492	09/10/2003	Microsoft Windows RPCSS Service contains heap overflow in DCOM activation routines
90.97	VU#162451	04/20/2004	Cisco IOS fails to properly process solicited SNMP operations
89.5	VU#150227	02/19/2002	HTTP proxy default configurations allow arbitrary TCP connections
88.2	VU#827267	10/23/2008	Microsoft Server service RPC stack buffer overflow vulnerability
87.72	VU#29823	06/23/2000	Format string input validation error in wu-ftpd site_exec() function
81	VU#5648	07/27/1998	Buffer Overflows in various email clients
79.65	VU#970472	04/04/2001	Network Time Protocol ([x]ntpd) daemon contains buffer overflow in ntp_control:ctl_getitem() function
79.31	VU#789543	05/14/2001	IIS decodes filenames superfluously after applying security checks
78.75	VU#568148	07/16/2003	Microsoft Windows RPC vulnerable to buffer overflow
78	VU#117394	03/17/2003	Buffer Overflow in Core Microsoft Windows DLL
78	VU#257164	07/11/2006	Microsoft DHCP Client service contains a buffer overflow
76.5	VU#323070	11/25/2003	Outlook Express MHTML protocol handler does not properly validate source of alternate content
74.81	VU#745371	07/18/2001	Multiple vendor telnet daemons vulnerable to buffer overflow via crafted protocol options
73.5	VU#411332	07/16/2003	Cisco IOS Interface Blocked by IPv4 Packet
73.1	VU#28934	12/14/1999	Sun Solaris sadmind buffer overflow in amsl_verify when requesting NETMGT_PROC_SERVICE
72.9	VU#940193	07/10/2010	Microsoft Windows automatically executes code specified in shortcut files
72.14	VU#493881	12/09/2008	Microsoft Internet Explorer data binding memory corruption vulnerability
69.3	VU#952336	06/18/2001	Microsoft Index Server/Indexing Service used by IIS 4.0/5.0 contains unchecked buffer used when encoding double-byte characters
69.25	VU#107186	02/12/2002	Multiple vulnerabilities in SNMPv1 trap handling
69.25	VU#753044	07/18/2006	Microsoft Windows WebViewFolderIcon ActiveX integer overflow
68.84	VU#343145	05/08/2007	Microsoft Exchange Server fails to properly decode MIME email messages
68.4	VU#111677	10/10/2000	Microsoft IIS 4.0 / 5.0 vulnerable to directory traversal via extended unicode in url (MS00-078)
67.5	VU#591890	12/18/2002	Buffer overflow in Microsoft Windows Shell
67.5	VU#881872	02/10/2007	Sun Solaris telnet authentication bypass vulnerability
67.2	VU#897604	03/29/2003	Sendmail address parsing buffer overflow

		Vulnerability Notes By Metric Notes 1 - 30 of 2649

I'm not sure why I find this list so appealing (it's attempt to rank these things, the sheer quantity of Microsoft (though as % of installed base, it may be fairly represented, I'm not sure), the quantity of the list, the breadth/depth of it, etc.).

assuming you've jailbroken, you should then do this as it will close the hole that allowed the jailbreak (and then you don't have to stress about upgrading to 4.0.2)