Table of Contents
Part 3
Entries
Entry 9: April 1, 2012
What action or concept of significance, as related to the course, did you experience on this date?
I was looking for “easter eggs” in unix. There are a lot of them in the old systems, but they seem to have been removed or just not on the lab46 term. I did find some fun ones
moo in apt-get
lab46:~$ apt-get moo (__) (oo) /------\/ / | || * /\---/\ ~~ ~~ ...."Have you mooed today?"... lab46:~$
moo in aptitude
# aptitude moo There are no Easter Eggs in this program. # aptitude -v moo There really are no Easter Eggs in this program. # aptitude -v -v moo Didn't I already tell you that there are no Easter Eggs in this program? # aptitude -v -v -v moo Stop it! # aptitude -v -v -v -v moo Okay, okay, if I give you an Easter Egg, will you go away? # aptitude -v -v -v -v -v moo All right, you win. /----\ -------/ \ / \ / | -----------------/ --------\ ---------------------------------------------- # aptitude -v -v -v -v -v -v moo What is it? It's an elephant being eaten by a snake, of course.
last one
lab46:~$ ddate Today is Boomtime, the 54th day of Discord in the YOLD 3178
Entry 10: April 7, 2012
I have a new phone… the droid razr… so nice.
Not being rooted makes me feel like a little kid who had his mommy put a lock on the frig.. I Must get access! I would do another experiment on this one but i already noted doing it on my samsung.
Entry 11: April 13, 2012
I am at work and I was talking with the resident IT personality. I was trying to glean the type of servers that we have and see if any are unix based. After finding out that he did not have any idea about the unix server that acts as a printer relay i was able to help him out. He needed to find the IP address and i was able to tell him what and how to do it.. nice
Entry 12: April Day, 2012
This is a sample format for a dated entry. Please substitute the actual date for “Month Day, Year”, and duplicate the level 4 heading to make additional entries.
As an aid, feel free to use the following questions to help you generate content for your entries:
- What action or concept of significance, as related to the course, did you experience on this date?
- Why was this significant?
- What concepts are you dealing with that may not make perfect sense?
- What challenges are you facing with respect to the course?
Remember that 4 is just the minimum number of entries. Feel free to have more.
cprog Keywords
- I/O Streams (cin, cout, cerr, stream operators) [C++]
- Namespaces [C++]
- Type Casting Operators, Const-Volatility Specifiers (const, volatile) [C++]
- Classes (Objects, Constructor, Destructor, Access Control, Public, Protected, Private, Friend, “this” pointer) [C++]
- Inheritance (single, multiple Inheritance), Polymorphism/Virtual Functions, Abstract Base Class [C++]
- Overloading (Functions, Operators) [C++]
- Exception Handing (throw, try, catch) [C++]
- Templates, STL (Standard Template Library) [C++]
cprog Keyword 17
I/O Streams (cin, cout, cerr, stream operators)
Definition
The concepts of I/O in C++ are streams, insertion, and extraction. The input stream is a source of input. It can be an object from which characters can be obtained (extracted). The output stream is an object to where output can be directed.
Demonstration
Here is and example
#include <iostream> #include <fstream> int main () { ofstream myfile; myfile.open ("example.txt"); myfile << "Writing this to a file.\n"; myfile.close(); return 0; }
cprog Keyword 18
Namespaces [C++]
Definition
A namespace is a declaration of different areas of the code. It calls them by a name and is then called out from within the code within the cycle of workflow.
Demonstration
Here is an example of the arrangement that a namespace takes within the code.
#include <iostream> using namespace std; namespace first { int var = 5; } namespace second { double var = 3.1416; } int main () { cout << first::var << endl; cout << second::var << endl; return 0; }
cprog Keyword 19
Classes
Definition
Classes are groups of data related to a single object type. They are really functions to access information, and the classes possess the ability to inherit from other classes.
Demonstration
Here is an example from wiki. This shows “class” being used to define the called variable “person”. Then person is further allocated to have two containers, a and b.
#include <iostream> #include <string> using namespace std; class person { public: string name; int age; }; int main() { person a, b; a.name = "Calvin"; b.name = "Hobbes"; a.age = 30; b.age = 20; cout << a.name << ": " << a.age << endl; cout << b.name << ": " << b.age << endl; return 0; }
cprog Keyword 20
Inheritance
Definition
Inheritance is a a structure of reusing existing classes that have already been declared without modifying them, thus producing hierarchical relationships between them.
Demonstration
In the following example the class “A” is called out as public making it inherit the past declaration.
#include <iostream> using namespace std; class A { int data; public: void f(int arg) { data = arg; } int g() { return data; } }; class B : public A { }; int main() { B obj; obj.f(20); cout << obj.g() << endl; }
cprog Keyword 21
Overloading
Definition
Overloading allows functions to have the same name but to have different parameters. So operators can be extend to act as a class within the same code.
Demonstration
Here is an example from wiki. The “time” operators is declared at the code header and given meaning. It is then broken into minutes and seconds.
Time operator+(const Time& lhs, const Time& rhs) { Time temp = lhs; temp.seconds += rhs.seconds; if (temp.seconds >= 60) { temp.seconds -= 60; temp.minutes++; } temp.minutes += rhs.minutes; if (temp.minutes >= 60) { temp.minutes -= 60; temp.hours++; } temp.hours += rhs.hours; return temp; }
cprog Keyword 22
Exception Handling
Definition
Exception Handling is the attempt to have foresight into problems that happen while the code is running. Planning ahead for the inability of the program to do what it is designed to do, like being unable to find the source file that is used to pull up a list of data. While righting you code it is a good idea to “throw and exception” and see how the code responds.
Demonstration
Here is an example where we are asking the user for two numbers… what if they add a letter?
cout << "Please provide two numbers\n"; cout << "First Number: "; cin >> a; cout << "Second Number: "; cin >> b;
Adding in an If statement when the input is used can handle this exception and have fun telling the user to go back to Kindergarten.
If (a='A') cout << "sorry bro...that is a letter.. and number is the ones you use when you count your pennys";
cprog Keyword 23
Templates, STL
Definition
STL is short for Standard Template Library. The templates are a standard list of classes and template code.
Demonstration
STL provides many different types of container types. One is called a vector. It is sets a block allocated for use and can grow as needed (something that would make bignum easier). Here is an example i found. You can see the used of the vector.h file and the allocating of it. “vector<int> v;”.
#include <string.h> #include <algo.h> #include <vector.h> #include <stdlib.h> #include <iostream.h> main () { vector<int> v; // create an empty vector of integers int input; while (cin >> input) // while not end of file v.push_back (input); // append to vector sort(v.begin(), v.end()); int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] << "\n"; }
cprog Objective
cprog Objective
Use a C program to change the IP address of my computer.
Definition
While doing other objectives I came across the suggestion that you should change your IP at given increments to increases your privacy while surfing. The documentation i was reading had more to do with other “outlets” for creative computing; however my love of computers comes from finding the limits of what can or cannot be done.
Method
Explore the world for a walk-through or community documentation. Compile that information and implement.
Measurement
To change your ip the standard ifconfig way
# ifconfig eth0 192.168.1.5 netmask 255.255.255.0 up # ifconfig eth0
Here is the direct code from lainoox that works very nicely. I would suggest that a script on playing with ifconfig would just be simpler. This is one approach.
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <sys/ioctl.h>
#include <linux/sockios.h>
#include <errno.h>
#include <netinet/in.h>
#if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1
#include <netpacket/packet.h>
#include <net/ethernet.h>
#else
#include <sys/types.h>
#include <netinet/if_ether.h>
#endif
int set_ip(char *iface_name, char *ip_addr)
{
if(!iface_name)
return -1;
int sockfd;
struct ifreq ifr;
struct sockaddr_in sin;
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if(sockfd == -1){
fprintf(stderr, "Could not get socket.\n");
return -1;
}
/* get interface name */
strncpy(ifr.ifr_name, iface_name, IFNAMSIZ);
/* Read interface flags */
if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
fprintf(stderr, "ifdown: shutdown ");
perror(ifr.ifr_name);
return -1;
}
/*
* Expected in <net/if.h> according to
* "UNIX Network Programming".
*/
#ifdef ifr_flags
# define IRFFLAGS ifr_flags
#else /* Present on kFreeBSD */
# define IRFFLAGS ifr_flagshigh
#endif
// If interface is down, bring it up
if (ifr.IRFFLAGS | ~(IFF_UP)) {
fprintf(stdout, "Device is currently down..setting up.-- %u\n",ifr.IRFFLAGS);
ifr.IRFFLAGS |= IFF_UP;
if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
fprintf(stderr, "ifup: failed ");
perror(ifr.ifr_name);
return -1;
}
}
sin.sin_family = AF_INET;
// Convert IP from numbers and dots to binary notation
inet_aton(ip_addr,&sin.sin_addr.s_addr);
memcpy(&ifr.ifr_addr, &sin, sizeof(struct sockaddr));
// Set interface address
if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
fprintf(stderr, "Cannot set IP address. ");
perror(ifr.ifr_name);
return -1;
}
#undef IRFFLAGS
return 0;
}
void usage()
{
const char *usage = {
"./set_ip [interface] [ip address]\n"
};
fprintf(stderr,"%s",usage);
}
int main(int argc, char **argv)
{
if(argc < 3){
usage();
return -1;
}
set_ip(argv[1],argv[2]);
return 0;
}
Out put of the program
ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:1b:21:0a:d2:cf
inet addr:192.168.5.12 Bcast:192.168.5.255 Mask:255.255.255.0
inet6 addr: fe80::21b:21ff:fe0a:d2cf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2690 errors:0 dropped:0 overruns:0 frame:0
TX packets:14732 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:516826 (516.8 KB) TX bytes:2242645 (2.2 MB)
$ sudo ./set_ip eth1 12.13.14.15
Device is currently down..setting up.-- 4163
$ ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:1b:21:0a:d2:cf
inet addr:12.13.14.15 Bcast:12.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::21b:21ff:fe0a:d2cf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2690 errors:0 dropped:0 overruns:0 frame:0
TX packets:14742 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:516826 (516.8 KB) TX bytes:2247309 (2.2 MB
Here is a shell script route
#!/bin/bash
SUBNET=192.168.135.
ETH=eth0
for i in {1..254}
do
ip addr add ${SUBNET}${i}/24 dev ${ETH}
# do whatever you want here
ip addr del ${SUBNET}${i}/24 dev ${ETH}
done
Sources
Analysis
Reflect upon your results of the measurement to ascertain your achievement of the particular course objective.
- How did you do?
- Is there room for improvement?
- Could the measurement process be enhanced to be more effective?
- Do you think this enhancement would be efficient to employ?
- Could the course objective be altered to be more applicable? How would you alter it?
unix Keywords
- Source Code, Object Code, Binary Code, Library (done)
- Pattern Matching(done)
- Regular Expressions(done)
- Filtering(done)
- Shell Scripting(done)
- networking, UNIX Networking Tools(done)
- Security(done)
- X Window System(done)
unix Keyword 17
Source Code, Object Code, Binary Code, Library
Definition
The source code for a program is the raw, un-processed by the compiler, file. Written in a programming language and used to further develop the software. The object code is produced by the compiler. It is generally a sequence of instruction that is used within the running the code. The Binary code is the machine language that is the final output of the compiler. This is actually was produces the desired results by the source code. The Library is the standard set or characters used in the correct syntax to tell the compiler what is needed to do.
Demonstration
Source Code example
#include<stdio.h> int main() { printf("yo dude"); return(0); }
unix Keyword 18
Pattern Matching
Definition
Pattern matching is using the syntax of search programs to find conditions that meet the requested quarry. The most commonly used program for searching is the grep command. Taken from the man pages, Grep is defines as, “Grep searches the named input FILEs (or standard input if no files are named, or the file name - is given) for lines containing a match to the given PATTERN”.
Demonstration
Syntax for grep
grep 'word' filename grep 'string1 string2' filename cat otherfile | grep 'something' command | grep 'something' command option1 | grep 'data' grep --color 'data' fileName
Example taken from another source
grep -v bash /etc/passwd | grep -v nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt news:x:9:13:news:/var/spool/news: mailnull:x:47:47::/var/spool/mqueue:/dev/null xfs:x:43:43:X Font Server:/etc/X11/fs:/bin/false rpc:x:32:32:Portmapper RPC user:/:/bin/false nscd:x:28:28:NSCD Daemon:/:/bin/false named:x:25:25:Named:/var/named:/bin/false squid:x:23:23::/var/spool/squid:/dev/null ldap:x:55:55:LDAP User:/var/lib/ldap:/bin/false apache:x:48:48:Apache:/var/www:/bin/false
unix Keyword 19
Regular Expressions
Definition
The term regular expressions is speaking about a set of characters that make up the words of patterns of a search. These are used when looking for specific strings of text that match the quarry. This is very much like the explained grep command earlier but focuses us into the actual, expression, wording used.
Demonstration
For example
grep -i man heroes.txt
We are searching for any string that meets the expression “man” in the text file “heroes.txt”. The output is the following.
Catwoman Batman Spider Man Wonder Woman Ant Man Aquaman Martian Manhunter
unix Keyword 20
Filtering
Definition
In Unix a filter is a way of using commands and pipes command that can manipulate the output of file. Two of the most powerful and popular Unix filters are the sed and awk commands.
Demonstration
The “sed” command allows us to look search a file and replace characters. For example in the following junk file. I have call cat to present the contents of the file. I then use a pipe to link in the sed command. Sed then looks as what is being outputted by cat and finds anything that is an “e” and replaces it with “E”.
$ cat junk.txt | sed -e "s/e/E/" corE worm sEed jEwel
unix Keyword 21
Shell Scripting
Definition
Shell scripting is a way that you can automate routine tasks. It allows the user more flexibility and control over the operation of the system.
Demonstration
Following example from the SSH manual. You can see by this example, that the more complex shell scripts take on the look and feel of the C programming language. We have presented a list and are going to work through the list.
#!/bin/sh fruitlist="Apple Pear Tomato Peach Grape" for fruit in $fruitlist do if [ "$fruit" = "Tomato" ] || [ "$fruit" = "Peach" ] then echo "I like ${fruit}es" else echo "I like ${fruit}s" fi done
Output of the script
I like Apples I like Pears I like Tomatoes I like Peachs I like Grapes
unix Keyword 22
networking, UNIX Networking Tools
Definition
I love networking.. and there are many flexible tools with unix. Networking is the communication between computers. It is bringing those computers together to share resources, make work groups or just set up a game of QuakeIII.
Some common commands
- finding host/domain name and IP address - hostname
- test network connection – ping
- getting network configuration – ifconfig
- Network connections, routing tables, interface statistics – netstat
- query DNS lookup name – nslookup
- communicate with other hostname – telnet
- outing steps that packets take to get to network host – traceroute
- view user information – finger
- checking status of destination host - telnet
Demonstration
Examples from the lab46 side
ab46:~$ hostname lab46 lab46:~$ ifconfig -bash: ifconfig: command not found lab46:~$ nslookup -bash: nslookup: command not found lab46:~$ telnet telnet> lab46:~$ lab46:~$ finger Login Name Tty Idle Login Time Office Office Phone jdavis34 Joshua Davis pts/22 1d Mar 6 12:57 (cpe-67-252-69-1:S.0) jdavis34 Joshua Davis pts/88 5d Mar 29 16:18 (cpe-67-252-69-1:S.3) jjohns43 Jeffrey Johnson pts/24 18d Jan 23 12:18 (cpe-74-65-82-173:S.0) jjohns43 Jeffrey Johnson pts/82 18d Feb 27 11:03 (cpe-74-65-82-173:S.0) jpettie Jacob Pettie pts/5 Mar 8 18:05 (pool-96-247-148-158:S.0) jpettie Jacob Pettie pts/31 46d Mar 6 14:35 (pool-96-247-148-158:S.1) jpettie Jacob Pettie pts/35 5d Mar 20 14:43 (pool-96-247-148-158:S.8) jpettie Jacob Pettie pts/44 38d Mar 6 16:39 (pool-96-247-148-158:S.3) jpettie Jacob Pettie pts/77 47d Mar 13 11:22 (pool-96-247-148-158:S.4) jpettie Jacob Pettie pts/75 56d Mar 6 15:17 (pool-96-247-148-158:S.2) jpettie Jacob Pettie pts/95 1:31 Mar 8 11:00 (pool-96-247-148-158:S.7) jpettie Jacob Pettie pts/91 40d Mar 8 10:58 (pool-96-247-148-158:S.5) jpettie Jacob Pettie pts/92 40d Mar 8 10:59 (pool-96-247-148-158:S.6) mfaucet2 Mason Faucett pts/65 1:06 Mar 22 13:17 (172:S.0) skinney1 Shane Kinney pts/55 May 1 11:54 (65-124-85-125.dia.static.qwest.net) squirrel Pressly Dowler pts/8 12d Apr 19 22:53 (softscope.lair.lan) tgalpin2 Tyler Galpin pts/12 11 Jan 30 21:25 (:pts/72:S.0) tgalpin2 Tyler Galpin *pts/72 11 May 2 11:06 (172.16.192.234) thakes3 Thomas Hakes pts/41 2d Apr 27 22:48 (172.16.198.198:S.0) thakes3 Thomas Hakes pts/62 2 May 2 10:43 (172.16.198.198:S.2) thakes3 Thomas Hakes pts/68 17 May 2 10:44 (172.16.198.198:S.3) thakes3 Thomas Hakes pts/2 3 Apr 30 11:36 (172.16.198.198:S.1) wedge Matthew Haas *pts/14 1 May 2 08:49 (telstar.lair.lan) lab46:~$ finger wedge Login: wedge Name: Matthew Haas Directory: /home/wedge Shell: /bin/bash On since Wed May 2 08:49 (EDT) on pts/14 from telstar.lair.lan 1 minute 34 seconds idle (messages off) Mail last read Wed May 2 09:49 2012 (EDT) Plan: ---------------------------------------------------------------------------- Lab46 System Administrator
FYI, that is a pointing finger.. not the one that goes up but strait out… lol
unix Keyword 23
Security
Definition
Security on a Unix system comes from a few areas of concentration. Using permissions for users and groups is one way to keep key areas of the system out of the reach of unwanted side effects. Another way is to use smart passwords. Insuring that passwords are change every 3 months, are unique and have both alpha and numeric elements. When it comes to a Unix server patching is the most frequently used method. Finding exploits and deploying methods to fix the seen threat. Other best practices are firewalls, iptables, white/black lists etc.
Demonstration
Use of the lsof commands that shows a list of open files and what or who opened them.
lab46:~$ lsof | less COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME init 1 root cwd unknown /proc/1/cwd (readlink: Permission denied) init 1 root rtd unknown /proc/1/root (readlink: Permission denied) init 1 root txt unknown /proc/1/exe (readlink: Permission denied) init 1 root NOFD /proc/1/fd (opendir: Permission denied) kthreadd 2 root cwd unknown /proc/2/cwd (readlink: Permission denied) kthreadd 2 root rtd unknown /proc/2/root (readlink: Permission denied) kthreadd 2 root txt unknown /proc/2/exe (readlink: Permission denied) kthreadd 2 root NOFD /proc/2/fd (opendir: Permission denied) migration 3 root cwd unknown /proc/3/cwd (readlink: Permission denied) migration 3 root rtd unknown /proc/3/root (readlink: Permission denied) migration 3 root txt unknown /proc/3/exe (readlink: Permission denied)
Use of the netstat command showing current connected protocols and their state.
lab46:~$ netstat -a Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 *:ssh *:* LISTEN tcp 0 0 *:35801 *:* LISTEN tcp 0 0 *:nfs *:* LISTEN tcp 0 0 *:3939 *:* LISTEN tcp 0 0 *:3333 *:* LISTEN tcp 0 0 lab46.offbyone.lan:5000 *:* LISTEN tcp 0 0 lab46.offbyone.lan:5007 *:* LISTEN tcp 0 0 *:59343 *:* LISTEN tcp 0 0 *:sunrpc *:* LISTEN tcp 0 0 *:csync2 *:* LISTEN tcp 0 0 lab46.offbyone.lan:4242 *:* LISTEN tcp 0 0 lab46.offbyone.la:60002 irc.offbyone.lan:ircd ESTABLISHED tcp 0 0 lab46.offbyone.la:41572 auth1.offbyone.lan:ldap ESTABLISHED tcp 0 0 lab46.offbyone.la:47089 irc.offbyone.lan:ircd ESTABLISHED tcp 0 0 lab46.offbyone.la:47998 irc.offbyone.lan:ircd ESTABLISHED tcp 0 0 lab46.offbyone.la:42140 auth1.offbyone.lan:ldap ESTABLISHED
unix Keyword 24
X Window System
Definition
The X Window System, X11, is the basic graphical user interface (GUI). X11 sits between the computer and the user acting like a translator. Taking the input from the user in the form of the mouse and keyboard and translating it to changes within the system.
Demonstration
Example of a GUI
unix Objective
unix Objective
Utilize the ntpq command
Definition
The ntpq command is a utility program that monitors the NTP deamon, ntpd. NTPQ stands for Network Time Protocol Query. It runs and interactive mode by using the command line and can write variables. “Ntpq uses NTP mode 6 packets to communicate with the NTP server, and hence can be used to query any compatible server on the network which permits it”, Man pages.
Method
Research, discover and implement.
Measurement
The ntpq command give and output requesting arguments.
lab46:~$ ntpq ntpq>
Check to make sure that the deamon is monitor is running. The following pgrep will feed back the process code ot ntpq.
lab46:~$ pgrep ntpd 961
The -p arguments shows the servers and their sink…
lab46:~$ ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== *juicebox.lair.l 116.204.3.124 2 u 385 1024 377 0.742 -0.054 4.615 caprisun.offbyo .STEP. 16 u - 1024 0 0.000 0.000 0.000
Analysis
Well… nothing really amazing with ntpq. I did find out a fun new command so mission done.
Resource List
unix Retest
Retest 7
Perform the following steps:
State Experiment
I am going to reinact the double connection by thakes.
http://lab46.corning-cc.edu/opus/spring2012/thakes3/start#experiment_4
Resources
Evaluate their resources and commentary. Answer the following questions:
- Do you feel the given resources are adequate in providing sufficient background information?
- This experiment is not heavy in the research need. Knowledge of ssh is all that is needed.
- Are there additional resources you've found that you can add to the resources list?
- The man pages and wiki
- Does the original experimenter appear to have obtained a necessary fundamental understanding of the concepts leading
- yes
- If you find a deviation in opinion, state why you think this might exist.
- none found
Hypothesis
State their experiment's hypothesis. Answer the following questions:
- Do you feel their hypothesis is adequate in capturing the essence of what they're trying to discover?
- yes it stated the needed direction and walked through the goal
- What improvements could you make to their hypothesis, if any?
- This was a simple state the desired outcome and shoot project. Nothing really to build on.
Experiment
Follow the steps given to recreate the original experiment. Answer the following questions:
- Are the instructions correct in successfully achieving the results?
- yes i was able to follow without any unknowns.
- Is there room for improvement in the experiment instructions/description? What suggestions would you make?
- well… he could have given us his password… lol… no it was good.
- screen shots are always nice and he presented that.
- Would you make any alterations to the structure of the experiment to yield better results? What, and why?
- nope
Data
Analysis
Answer the following:
- Does the data seem in-line with the published data from the original author?
- yes
- Can you explain any deviations?
- none
- How about any sources of error?
- nope
- Is the stated hypothesis adequate?
- yup
Conclusions
Answer the following:
- What conclusions can you make based on performing the experiment?
- That i have a double connection and could keep in going… maybe a single script used a lot could cause the server some issues… bad thought… nvm
- Do you feel the experiment was adequate in obtaining a further understanding of a concept?
- yes
- Does the original author appear to have gotten some value out of performing the experiment?
- he had fun and so did I, so yes he learned how to use ssh and find another way to play with the server
- Any suggestions or observations that could improve this particular process (in general, or specifically you, or specifically for the original author).
- I like it, good deal.
Retest 8
Perform the following steps:
State Experiment
I am going to do asowers xfc4 panel experiment.
http://lab46.corning-cc.edu/opus/spring2012/asowers/start#experiment_1
Resources
Evaluate their resources and commentary. Answer the following questions:
- Do you feel the given resources are adequate in providing sufficient background information?
- I was lost… there are terms that he knows that are not listed or given any explanation for.
- Are there additional resources you've found that you can add to the resources list?
- Does the original experimenter appear to have obtained a necessary fundamental understanding of the concepts leading up to their stated experiment?
- for the user it met what he needed
- If you find a deviation in opinion, state why you think this might exist.
- I just need more to be able to implement and at this point do not know what it is.
Hypothesis
State their experiment's hypothesis. Answer the following questions:
- Do you feel their hypothesis is adequate in capturing the essence of what they're trying to discover?
- I understand what he is after and that he reached the goal.
- What improvements could you make to their hypothesis, if any?
- Explain more about what he is going to do and what tool he is going to use to do it with.
Experiment
Follow the steps given to recreate the original experiment. Answer the following questions:
- Are the instructions correct in successfully achieving the results?
- no, i am unable to complete the expirment
- Is there room for improvement in the experiment instructions/description? What suggestions would you make?
- Need more thought about tool needed and how it is to be done.
- Would you make any alterations to the structure of the experiment to yield better results? What, and why?
- His set up was fine
Data
Analysis
First I needed to attain my IP then I attempted to bring me up
lab46:~$ ssh -X skinney1@192.168.1.112 ssh: connect to host 192.168.1.112 port 22: Connection timed out
attempt to bring panel
lab46:~$ sudo xfce4-panel [sudo] password for skinney1: skinney1 is not in the sudoers file. This incident will be reported.
- Does the data seem in-line with the published data from the original author?
- unable to complete
- Can you explain any deviations?
- I attempted by using my IPv4 Add and my Default gateway on port 22 with not use.
- How about any sources of error?
- just need more information
- Is the stated hypothesis adequate?
- yes
Conclusions
Answer the following:
- What conclusions can you make based on performing the experiment?
- Maybe i need to be at the comp lab or a strait unix machine
- Do you feel the experiment was adequate in obtaining a further understanding of a concept?
- For the author, yes.
- Does the original author appear to have gotten some value out of performing the experiment?
- yes
- Any suggestions or observations that could improve this particular process (in general, or specifically you, or specifically for the original author).
- already noted
Retest 9
Perform the following steps:
State Experiment
I am going to retest Brain Robbins play on the break command.
http://lab46.corning-cc.edu/opus/spring2012/brobbin4/start#experiment_1
Resources
Evaluate their resources and commentary. Answer the following questions:
- Do you feel the given resources are adequate in providing sufficient background information?
- Brain did a really good job explaining the concepts and walking the idea from conceptual to completion.
- Are there additional resources you've found that you can add to the resources list?
- Nope
- Does the original experimenter appear to have obtained a necessary fundamental understanding of the concepts leading up to their stated experiment?
- Yes
- If you find a deviation in opinion, state why you think this might exist.
- None
Hypothesis
State their experiment's hypothesis. Answer the following questions:
- Do you feel their hypothesis is adequate in capturing the essence of what they're trying to discover?
- yes, nothing wrong with what is listed.
- What improvements could you make to their hypothesis, if any?
Experiment
Follow the steps given to recreate the original experiment. Answer the following questions:
- Are the instructions correct in successfully achieving the results?
- Yes, completed without issues
- Is there room for improvement in the experiment instructions/description? What suggestions would you make?
- None
- Would you make any alterations to the structure of the experiment to yield better results? What, and why?
- none
Data
Publish the data you have gained from your performing of the experiment here.
No additional research was needed.
Analysis
Answer the following:
- Does the data seem in-line with the published data from the original author?
- yes
- Can you explain any deviations?
- none
- How about any sources of error?
- none
- Is the stated hypothesis adequate?
- yes
Conclusions
Answer the following:
- What conclusions can you make based on performing the experiment?
- Using the break command does a better job then exit when you need a break command.
- Do you feel the experiment was adequate in obtaining a further understanding of a concept?
- yes
- Does the original author appear to have gotten some value out of performing the experiment?
- yes
- Any suggestions or observations that could improve this particular process (in general, or specifically you, or specifically for the original author).
- none, good job dude.
Experiments
Experiment 7
Question
What on earth is telnet for?
Resources
- man
Hypothesis
Can telnet be used like ssh?
Experiment
“GIFY”, play and try.
Data
Telnet is is a network protocol much like ssh. TI is used to provide a connection between a user and server with TCP (Transmission Control Protocol). The basic syntax is telnet host.com. There are a list of arguments that can be used just like with any other utility.
telnet [-468ELadr] [-S tos] [-b address] [-e escapechar] [-l user] [-n tracefile] [host [port]]
Use telnet to connect to a server
telnet towel.blinkenlights.nl
Once connected starwar ascii plays
/~\ ( oo| They've shut down _\=/_ the main reactor. ___ # / _ \ / ()\ \\//|/.\|\\ _|_____|_ \/ \_/ || | | === | | |\ /| || |_| O |_| \_ _/ # || O || | | | ||__*__|| | | | |~ \___/ ~| []|[] /=\ /=\ /=\ | | | ________________[_]_[_]_[_]________/_]_[_\_________________________
Analysis
Based on the data collected:
- Was your hypothesis correct?
- yes, same thing with not as much fun
- Was your hypothesis not applicable?
- yes
- Is there more going on than you originally thought? (shortcomings in hypothesis)
- no
- What shortcomings might there be in your experiment?
- it was a shoot and hit experiment
- What shortcomings might there be in your data?
Conclusions
Telnet is just one more approach that has been taken to network computer together. It is used typically in a windows and unix server world.
Experiment 8
Implement TOR
Question
Can TOR be implemented on a droid unix machine.
Resources
- http://en.wikipedia.org/wiki/Tor_(anonymity_network)
Hypothesis
I am not the first, there must be away!?
Experiment
Success is gained from a working install of TOR on a droid unix machine.
Data
Thankfully, i found out after starting this project that Orbot worked on a nice app for TOR. TOR stands for The Onion Router and is designed to enable online anonymity. Much like a multilevel proxy. The project was started in 2002 by Roger Dingledine, nick Mathewson and Paul Syverson. In 2011 the project was awarded the Free Software Foundation's 2010 aware for projects of social benefit. Tor basically works to conceal the user from surveillance and traffic analysis. It encrypts and then randomly bounces the communications through a bunch of relays run by volunteers all over the place.
Install
Simple download the .apk file
https://play.google.com/store/apps/details?id=org.torproject.android&hl=en
Once installed you need to set up some fine points. TOR wants you to have root access to the device, but has a version for the unrooted. It will ask you simple questions about what you want to do with it, have everything use it etc.
I established everything and surprise… everything works fine.
Orbweb is also a nice install allow a full browsing experience that even tells you your fake IP, mine was 31.172.30.4.
Analysis
- Was your hypothesis correct?
- Yes
- Was your hypothesis not applicable?
- Yes
- Is there more going on than you originally thought? (shortcomings in hypothesis)
- NO
- What shortcomings might there be in your experiment?
- I cannot seem to find an experiment that is data driven
- What shortcomings might there be in your data?
Conclusions
Thanks to projects and a supportive community of developers the general public has access to wonderful tools like TOR. The ease of install and of use made this project and easy score.
Retest 3
State Experiment
Jdavis, float experiment
http://lab46.corning-cc.edu/opus/spring2012/jdavis34/start#experiment_if_or_not_if
Resources
Evaluate their resources and commentary. Answer the following questions:
- Do you feel the given resources are adequate in providing sufficient background information?
- They worked for him, but I need more to go on.
- Are there additional resources you've found that you can add to the resources list?
- Yes, noted bellow.
- Does the original experimenter appear to have obtained a necessary fundamental understanding of concept?
- yes
- If you find a deviation in opinion, state why you think this might exist.
- He seems to have issues with the code.. lets see if i get any further….
Hypothesis
State their experiment's hypothesis. Answer the following questions:
- Do you feel their hypothesis is adequate in capturing the essence of what they're trying to discover?
- Yes
- What improvements could you make to their hypothesis, if any?
- none
Experiment
Follow the steps given to recreate the original experiment. Answer the following questions:
- Are the instructions correct in successfully achieving the results?
- Is there room for improvement in the experiment instructions/description? What suggestions would you make?
- Would you make any alterations to the structure of the experiment to yield better results? What, and why?
Data
- http://msdn.microsoft.com/en-us/library/hd7199ke(v=vs.80).aspx
Analysis
Answer the following:
- Does the data seem in-line with the published data from the original author?
- sure
- Can you explain any deviations?
- The mixing of a float and an int value results in two different types of holders.. then to do some math on it and ask for it to be normal just did not work for me.
#include <stdio.h> #include <float.h> int main() { float x; int y; int done; printf("Listen... we only add two numbers so keep it simple\n"); printf("input 1st num\n "); scanf("%f", &x); printf("input 2nd num\n "); scanf("%d", &y); done = x + y; printf("%f\n", done); return 0; }
Value is dumb
input 1st num 2 input 2nd num 2 0.000000
- How about any sources of error?
- I am not a pro… so i hate pointing at someone else's stuff knowing that i am also missing things.. but since you insist.
- You can the project was started when we first began out C programming learning.
- missing line breaks
- cannot use one printf to get two vaules if not allocated to do so
- did not declare the math header file
- attempted a getchar… not sure why
- The main focus was to see the int and float work together to do a simple math problem.
- Is the stated hypothesis adequate?
- yes
Conclusions
Answer the following:
- What conclusions can you make based on performing the experiment?
- I need more work with C, but i had fun mixing it up.
- Do you feel the experiment was adequate in obtaining a further understanding of a concept?
- yes
- Does the original author appear to have gotten some value out of performing the experiment?
- yes
- Any suggestions or observations that could improve this particular process (in general, or specifically you, or specifically for the original author).