Instructions: Using Unix programming language and regular expressions, 1. how many unique ip addresses were seen...

Instructions:

Using Unix programming language and regular expressions,

1. how many unique ip addresses were seen note: we only want to look at ipv4 addresses
2. which was most commnly seen ip address
on the piece of access.log file below

66.249.75.132 - - [18/Jun/2018:06:41:00 -0500] "GET /~rcoleman/Common/History/Images/?C=N;O=D HTTP/1.1" 200 1976 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
5.255.250.23 - - [18/Jun/2018:06:41:23 -0500] "GET /~rcoleman/Common/CodeVault/Code/DesignPatterns/Images/DP16-Builder.jpg HTTP/1.1" 304 182 "-" "Mozilla/5.0 (compatible; YandexImages/3.0; +http://yandex.com/bots)"
5.255.250.23 - - [18/Jun/2018:06:41:28 -0500] "GET /~rcoleman/CS121/CourseInfo/Images/WinExp.jpg HTTP/1.1" 304 180 "-" "Mozilla/5.0 (compatible; YandexImages/3.0; +http://yandex.com/bots)"
148.108.96.32 - - [18/Jun/2018:06:41:43 -0500] "GET /~rcoleman/Common/Basics/Images/ASCII_Table.jpg HTTP/1.1" 200 144715 "https://www.bing.com/" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0"
5.255.250.23 - - [18/Jun/2018:06:42:41 -0500] "GET /~delugach/Courses/H399-01/License%20Agreement%20for%20Acrobat HTTP/1.1" 200 12667 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)"
5.255.250.23 - - [18/Jun/2018:06:42:59 -0500] "GET /~rcoleman/Common/CodeVault/Code/DesignPatterns/Images/DP03-Decorator.jpg HTTP/1.1" 304 182 "-" "Mozilla/5.0 (compatible; YandexImages/3.0; +http://yandex.com/bots)"
49.36.1.71 - - [18/Jun/2018:06:43:22 -0500] "GET /favicon.ico HTTP/1.1" 301 4121 "https://www.cs.uah.edu/~rcoleman/Common/C_Reference/C++%20For%20DUMMIES.pdf" "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3452.0 Safari/537.36"
148.253.182.198 - - [18/Jun/2018:06:44:00 -0500] "GET /~rcoleman/CS121/ClassTopics/Images/Operators02.jpg HTTP/1.1" 200 54617 "https://www.bing.com/" "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko"
49.36.1.71 - - [18/Jun/2018:06:43:21 -0500] "GET /~rcoleman/Common/C_Reference/C++%20For%20DUMMIES.pdf HTTP/1.1" 200 8103354 "https://www.google.co.in/" "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3452.0 Safari/537.36"
66.249.75.130 - - [18/Jun/2018:06:44:42 -0500] "GET /~rcoleman/Common/History/Images/Pic20_ABC.jpg HTTP/1.1" 304 181 "-" "Googlebot-Image/1.0"
179.7.54.141 - - [18/Jun/2018:06:44:53 -0500] "GET /~rcoleman/Common/C_Reference/C++%20For%20DUMMIES.pdf HTTP/1.1" 200 8085570 "-" "Dalvik/2.1.0 (Linux; U; Android 7.0; SM-J730GM Build/NRD90M)"
175.158.232.110 - - [18/Jun/2018:06:45:58 -0500] "GET /~rcoleman/CS121/ClassTopics/Images/CompSys10.jpg HTTP/1.1" 200 217846 "https://www.google.com.ph/" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36"
5.255.250.23 - - [18/Jun/2018:06:46:03 -0500] "GET /~rcoleman/Common/SoftwareEng/Images/UML_01.jpg HTTP/1.1" 304 181 "-" "Mozilla/5.0 (compatible; YandexImages/3.0; +http://yandex.com/bots)"
5.255.250.23 - - [18/Jun/2018:06:46:23 -0500] "GET /~dhardin/cs_100/Animations/frmMoveBall_GUI.frm HTTP/1.1" 200 2066 "-" "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)"
216.244.66.197 - - [18/Jun/2018:06:47:14 -0500] "GET /robots.txt HTTP/1.1" 301 577 "-" "Mozilla/5.0 (compatible; DotBot/1.1; http://www.opensiteexplorer.org/dotbot, [email protected])"
157.55.39.241 - - [18/Jun/2018:06:47:37 -0500] "GET /~rcoleman/Common/Basics/Images/Pointers03.jpg HTTP/1.1" 200 76104 "-" "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)"
41.190.3.133 - - [18/Jun/2018:06:47:51 -0500] "GET /~rcoleman/Common/History/History.html HTTP/1.1" 200 9592 "http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&ved=0ahUKEwjNw_ODkt3bAhWkB8AKHfbUCMwQFghnMA0&url=http%3A%2F%2Fwww.cs.uah.edu%2F~rcoleman%2FCommon%2FHistory%2FHistory.html&usg=AOvVaw1na6HxGz_OCQSHXgI3jn1L" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"
41.190.3.133 - - [18/Jun/2018:06:47:52 -0500] "GET /~rcoleman/Common/History/Images/Pic02_RomanAbacus.jpg HTTP/1.1" 200 43539 "http://www.cs.uah.edu/~rcoleman/Common/History/History.html" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"
41.190.3.133 - - [18/Jun/2018:06:47:52 -0500] "GET /~rcoleman/Common/History/Images/Pic01_AncientTimes.jpg HTTP/1.1" 200 40097 "http://www.cs.uah.edu/~rcoleman/Common/History/History.html" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"
41.190.3.133 - - [18/Jun/2018:06:47:52 -0500] "GET /~rcoleman/Common/History/Images/Pic03_JohnNapier.jpg HTTP/1.1" 200 39131 "http://www.cs.uah.edu/~rcoleman/Common/History/History.html" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"
41.190.3.133 - - [18/Jun/2018:06:47:52 -0500] "GET /~rcoleman/Common/History/Images/Pic06_WilliamOughtred.jpg HTTP/1.1" 200 49153 "http://www.cs.uah.edu/~rcoleman/Common/History/History.html" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"
41.190.3.133 - - [18/Jun/2018:06:47:52 -0500] "GET /~rcoleman/Common/History/Images/Pic05_SlideRule.jpg HTTP/1.1" 200 71314 "http://www.cs.uah.edu/~rcoleman/Common/History/History.html" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"
41.190.3.133 - - [18/Jun/2018:06:47:53 -0500] "GET /~rcoleman/Common/History/Images/Pic04_NapiersBones.jpg HTTP/1.1" 200 53637 "http://www.cs.uah.edu/~rcoleman/Common/History/History.html" "Mozilla/5.0 (Windows NT 6.1; rv:36.0) Gecko/20100101 Firefox/36.0"

Expert Solution

Answer 1
***********

grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' access.log | uniq

Answer 2
************

grep -o "[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+" access.log | sort | uniq -c | sort -n

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venereology answered 9 months ago

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