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CS6 Practical System Skills Fall 9 edition Leonhard Spiegelerg - PowerPoint PPT Presentation

Aug 19, 2022 •172 likes •842 views

CS6 Practical System Skills Fall 9 edition Leonhard Spiegelerg lspiegel@s.rown.edu grep/sed/awk 2 / 65 Regex task Examples should not match #123456 123456 match hexadecimal RGB colors #abDE87 #XYabcd #001200

  1. CS6 Practical System Skills Fall ���9 edition Leonhard Spiegel�erg lspiegel@�s.�rown.edu

  2. grep/sed/awk 2 / 65

  3. Regex task Examples should not match #123456 123456 match hexadecimal RGB colors #abDE87 #XYabcd #001200 #ghabcd 0 1000 match non-negative integers 0-999 1 02 without leading zeros 98 003 999 ⇒ 3 / 65

  4. Regex task Solution (not unique per se) match hexademical RGB colors #[0-9a-fA-F]{6} integers 0-999 without leading ^([0-9]|[1-9][0-9]{0,2})$ or ^0$|^[1-9][0-9]{0,2}$ zeros ⇒ ⇒ 4 / 65

  5. ⇒ ^([0-9]|[1-9][0-9]|1[0-9]{0,2}|25[0-5]|2[0-4][0-9])$ ⇒ 5 / 65

  6. curl -s https://cs.brown.edu/courses/csci0060/lectures.html | grep -Eo 'href=".*\.pdf' | sed 's/href="\.//' | sed 's|^|https://cs.brown.edu/courses/csci0060|' | xargs -n1 curl -O 6 / 65

  7. �� CS6 Pra�ti�al System Skills Fall ���9 Leonhard Spiegel�erg lspiegel@�s.�rown.edu

  8. ⇒ ⇒ → → → 8 / 65

  9. DNS Server Web browser Web server hosting website 9 / 65

  10. ⇒ https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html ⇒ ⇒ 10 / 65

  11. HTTP GET request for course website 11 / 65

  12. GET / HTTP/1.1 ⇒ → 12 / 65

  13. ⇒ HTTP/1.1. 200 OK Example response message HTTP/1.1 200 OK Server: nginx/1.10.3 Date: Thu, 10 Oct 2019 13:04:41 GMT Content-Type: text/html Content-Length: 2084 Connection: keep-alive Last-Modified: Tue, 08 Oct 2019 20:41:58 GMT ETag: "15fa-5946c3317148d-gzip" Accept-Ranges: bytes Vary: Accept-Encoding Content-Encoding: gzip 13 / 65

  14. 14 / 65

  15. → → → ⇒ ⇒ → 15 / 65

  16. ⇒ → ⇒ → ⇒ → 16 / 65

  17. → → -v --trace-ascii logfile.txt performs HEAD request -I --head performs POST request with data as message body -d data --data data sometimes servers redirect pages (i.e. you'll receive a 3XX -L --location response), use this option to let curl follow the redirect. 17 / 65

  18. ⇒ curl --data "" --header "Accept: text/html" --request GET cs.brown.edu ⇒ ⇒ https://developers.whatismybrowser.com/useragents/explore/ 18 / 65

  19. ⇒ → ⇒ -s ⇒ -O ⇒ -o -o - curl -L cs.brown.edu/courses/csci0060/assets/slides/slides9.pdf -o lecture09.pdf 19 / 65

  21. ⇒ ⇒ ⇒ 21 / 65

  22. ⇒ ⇒ ⇒ ⇒ <tag> </tag> <p>Some text here…</p> 22 / 65

  23. <tag> ⇒ </tag> ⇒ <tag attribute="value"></tag> <div class="blue" id="main" width="100px"></div> 23 / 65

  24. ⇒ → <p>some text</p> <P>some text</P> <p>SOME text</p> <p>some text</p> <div class="HELLO"></div> <DIV CLass="HELLO"></DiV> <div class="hello"></div> 24 / 65

  25. ⇒ <outerTag> <innerTag> text </innerTag> </outerTag> ⇒ <!-- comment goes here --> 25 / 65

  26. <!DOCTYPE html> <html> <head> <title>This is the title of the webpage</title> </head> <body> <h1>This is the body of the page</h1> <p>Some content here…</p> </body> </html> ⇒ html htm 26 / 65

  27. ⇒ ⇒ brackets.io, Sublime Text, Atom.io, WebStorm, Adobe Dreamweaver, ... ⇒ codepen.io, playcode.io, scratchpad.io, ... 27 / 65

  30. ⇒ h1, …, h6 <h1>Heading</h1> ⇒ p></p> p ⇒ <b>bold text</b> <!-- bold text --> <i>italic text</i> <!-- italic text --> E=MC<sup>2</sup> <!-- superscript --> H<sub>2<sub>O <!-- subscript --> 30 / 65

  31. ⇒ <br> ⇒ <hr> ⇒ <br /> <hr /> <br> <hr> 31 / 65

  32. ⇒ strong em ⇒ blockquote q ⇒ abbr <abbr title="National Aeonautics and Space Administration">NASA</abbr> ⇒ 32 / 65

  34. ⇒ ol ul <ul> <li>Item 1</li> <li>Item 2</li> </ul> 34 / 65

  36. ⇒ ⇒ <a href="http://cs.brown.edu">CS Department@Brown</a> 36 / 65

  37. ⇒ ⇒ → ⇒ <a href="../music/top50.html>Billboard Top50</a> ../music 37 / 65

  38. ⇒ <h1 id="first-main-heading">Heading</h1> ⇒ <a href="#first-main-heading">go to first heading</a> 38 / 65

  39. ⇒ <a href="mailto:lspiegel@cs.brown.edu:>Email Leonhard</a> ⇒ _blank _self _parent 39 / 65

  41. ⇒ <img> ⇒ img/ images/ ⇒ <img src="images/tux.png" alt="mascot of linux"> 41 / 65

  42. ⇒ → width="100" width="100px" width="20%" ⇒ <p></p> → align="left" align="right" → align="top" align="middle" align="bottom" 42 / 65

  44. ⇒ ⇒ → ⇒ ⇒ 44 / 65

  45. ⇒ ⇒ ⇒ ⇒ ⇒ 45 / 65

  46. <table> <thead> country capital <tr> <th>country</th> U.S.A Washington, D.C. <th>capital</th> Canada Ottawa </tr> </thead> <tbody> <tr> <td>U.S.A</td><td>Washington, D.C.</td> </tr> <tr> <td>Canada</td><td>Ottawa</td> </tr> </tbody> </table> 46 / 65

  48. ⇒ ⇒ nav ul ⇒ section ⇒ header footer 48 / 65

  50. ⇒ ⇒ <style type="text/css"></style> <link href="css/style.css" type="text/css" rel="stylesheet"> <p style="color: #ccc; background-color: #000;">...</p> 50 / 65

  51. p { font-family: Arial; color: blue; } ⇒ property: value ⇒ 51 / 65

  52. ⇒ → → tag{ …} #name {...} .name {...} 52 / 65

  53. ⇒ h1, h2, h3 {...} p a {...} <a> <p> p>a {...} <a> <p> <p><a></a><p> <p><div><a></a></div></p> p.note p 53 / 65

  54. p#name p name ⇒ <p class="text text-justify">...</p> 54 / 65

  55. ⇒ ⇒ 55 / 65

  56. ⇒ ⇒ 56 / 65

  57. �� CS6 Pra�ti�al System Skills Fall ���9 Leonhard Spiegel�erg lspiegel@�s.�rown.edu

  58. → ⇒ ⇒ ⇒ ⇒ ⇒ → 58 / 65

  59. 59 / 65

  60. ⇒ ⇒ ⇒ 60 / 65

  61. ⇒ ⇒ ⇒ ⇒ ⇒ 61 / 65

  62. 62 / 65

  63. curl cs.brown.edu/cs1951g → 63 / 65

  64. curl cs.brown.edu/cs1951g | grep -Eo "slides/.*\.pdf" | sed 's|^|cs.brown.edu/cs1951g/|' | xargs -n1 curl -O → 64 / 65

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