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216.58.210.78 - - [27/Feb/2015:17:55:11 +0000] "GET /css/typography.css HTTP/1.1" 200 3377 "http://martin.kleppmann.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.115 Safari/537.36"

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5 216.58.210.78 - - [27/Feb/2015:17:55:11 +0000] "GET /css/typography.css HTTP/1.1" 200 3377 "http://martin.kleppmann.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.115 Safari/537.36"

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5 /css/typography.css /index.html /favicon.ico /talks.html /favicon.ico /index.html /css/typography.css /favicon.ico

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5 /css/typography.css /css/typography.css /favicon.ico /favicon.ico /favicon.ico /index.html /index.html /talks.html

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5 2 /css/typography.css 3 /favicon.ico 2 /index.html 1 /talks.html

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5 3 /favicon.ico 2 /css/typography.css 2 /index.html 1 /talks.html

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cat access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head –n 5 3 /favicon.ico 2 /css/typography.css 2 /index.html 1 /talks.html

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References •  M D McIlroy, E N Pinson, and B A Tague: “UNIX Time-Sharing System: Foreword,” The Bell System Technical Journal, volume 57, number 6, pages 1899–1904, July 1978. https:// archive.org/details/bstj57-6-1899 •  Rob Pike and Brian W Kernighan: “Program design in the UNIX environment,” AT&T Bell Laboratories Technical Journal, volume 63, number 8, pages 1595–1605, October 1984. doi: 10.1002/j.1538-7305.1984.tb00055.x, http://harmful.cat-v.org/cat-v/unix_prog_design.pdf •  Dennis Ritchie: “Advice from Doug McIlroy.” http://cm.bell-labs.co/who/dmr/ mdmpipe.html •  Jay Kreps: “Putting Apache Kafka to use: A practical guide to building a stream data platform (part 2).” 24 February 2015. http://www.confluent.io/blog/stream-data- platform-2/ •  Jay Kreps: “I ♥︎ Logs.” O’Reilly Media, September 2014. http://shop.oreilly.com/product/ 0636920034339.do •  Martin Kleppmann: “Bottled Water: Real-time integration of PostgreSQL and Kafka.” 23 April 2015. http://www.confluent.io/blog/bottled-water-real-time-integration-of- postgresql-and-kafka/ •  Martin Kleppmann: “Designing Data-Intensive Applications.” O’Reilly Media, to appear in 2015. http://dataintensive.net

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