├── .gitignore
├── README.md
├── cookbook.org
└── cookbook.pdf


/.gitignore:
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1 | _minted-cookbook
2 | .DS_Store
3 | *.tex
4 | 


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/README.md:
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1 | # awk-cookbook
2 | 
3 | Useful AWK one-liners for your day-to-day tasks.
4 | 
5 | ## License
6 | 
7 | Use it as you see fit :)
8 | 


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/cookbook.org:
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  1 | #+LaTeX_CLASS: article
  2 | #+LaTeX_HEADER: \usepackage[T1]{fontenc}
  3 | #+LaTeX_HEADER: \usepackage{libertine}
  4 | #+LaTeX_HEADER: \renewcommand*\oldstylenums[1]{{\fontfamily{fxlj}\selectfont #1}}
  5 | #+LaTeX_HEADER: \usepackage{lmodern}
  6 | #+LaTeX_HEADER: \usepackage{minted}
  7 | #+LaTeX_HEADER: \usemintedstyle{emacs}
  8 | #+LaTeX_HEADER: \newminted{bash}{fontsize=\footnotesize}
  9 | 
 10 | #+LaTeX_HEADER:\usepackage{titlesec}
 11 | #+LaTeX_HEADER:\titlespacing*{\section}
 12 | #+LaTeX_HEADER:{0pt}{5.5ex plus 1ex minus .2ex}{4.3ex plus .2ex}
 13 | #+LaTeX_HEADER:    \vspace*{\stretch{4.0}}\titlespacing*{\subsection}
 14 | #+LaTeX_HEADER:{0pt}{5.5ex plus 1ex minus .2ex}{4.3ex plus .2ex}
 15 | 
 16 | #+LaTeX_HEADER: \begin{titlepage}
 17 | #+LaTeX_HEADER:    \vspace*{\stretch{1.0}}
 18 | #+LaTeX_HEADER:    \begin{center}
 19 | #+LaTeX_HEADER:       \Huge\textbf{AWK Cookbook}\\
 20 | #+LaTeX_HEADER:       \large\textit{Kiran Gangadharan}
 21 | #+LaTeX_HEADER:    \end{center}
 22 | #+LaTeX_HEADER:    \vspace*{\stretch{2.0}}
 23 | #+LaTeX_HEADER: \end{titlepage}
 24 | 
 25 | * Recipes
 26 | ** Count lines in a file
 27 | 
 28 | #+BEGIN_SRC sh
 29 | awk 'END { print NR }'
 30 | #+END_SRC
 31 | 
 32 | ** Count no of words in a file
 33 | 
 34 | #+BEGIN_SRC sh
 35 | awk '{ total = total + NF } END { print total }'
 36 | #+END_SRC
 37 | 
 38 | ** Find sum of columns for each row
 39 | 
 40 | #+BEGIN_SRC sh
 41 | awk '{s=0; for (i=1; i<=NF; i++) s=s+$i; print s}'
 42 | #+END_SRC
 43 | 
 44 | ** Find and replace in file
 45 | 
 46 | #+BEGIN_SRC sh
 47 | # Replace only first instance in line
 48 | awk '{sub(/HTML/, "html")}; 1' data.txt > data_new.txt
 49 | 
 50 | # Replace all instances in line
 51 | awk '{gsub(/HTML/, "html")}; 1' data.txt > data_new.txt
 52 | #+END_SRC
 53 | 
 54 | ** Remove duplicate lines from a file
 55 | 
 56 | #+BEGIN_SRC sh
 57 | awk '!a[$0]++' data.txt
 58 | #+END_SRC
 59 | 
 60 | ** Print all lines containing "Programming"
 61 | 
 62 | #+BEGIN_SRC sh
 63 | awk '/Programming/ { n++ }; END { print n+0 }'
 64 | #+END_SRC
 65 | 
 66 | ** Prefixing line with increasing number
 67 | 
 68 | #+BEGIN_SRC sh
 69 | awk '{print FNR ". " $0}' data.txt
 70 | #+END_SRC
 71 | 
 72 | ** Print account name and role from /etc/passwd
 73 | 
 74 | #+BEGIN_SRC sh
 75 | awk -F : '/^[^(#|_)]/ {print $1, "=>", $5}' /etc/passwd
 76 | #+END_SRC
 77 | 
 78 | ** Find the line containing largest value in the first column
 79 | 
 80 | #+BEGIN_SRC sh
 81 | awk '$1 > max {max=$1; maxline=$0}; END{ print maxline}' data.txt
 82 | #+END_SRC
 83 | 
 84 | ** Swap first two columns of every line
 85 | 
 86 | #+BEGIN_SRC sh
 87 | awk '{temp=$1; $1=$2; $2=temp} 1' data.txt
 88 | #+END_SRC
 89 | 
 90 | ** Delete second column from every line
 91 | 
 92 | #+BEGIN_SRC sh
 93 | awk '{ $2 = ""; print }' data.txt
 94 | #+END_SRC
 95 | 
 96 | ** Perform search similar to SQL 'where'
 97 | 
 98 | #+BEGIN_SRC sh
 99 | awk '$2 == "hello"' data.txt
100 | #+END_SRC
101 | ** Delete leading whitespace from each line
102 | 
103 | #+BEGIN_SRC sh
104 | awk '{sub(/^[ \t]+/, ""); print}'
105 | #+END_SRC
106 | ** Delete trailing whitespace from each line
107 | 
108 | #+BEGIN_SRC sh
109 | awk '{sub(/[ \t]+$/, ""); print}'
110 | #+END_SRC
111 | ** Replace all instances of "foo" with "bar"
112 | 
113 | #+BEGIN_SRC sh
114 | awk '{gsub(/foo/,"bar");print}'
115 | #+END_SRC
116 | 


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/cookbook.pdf:
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https://raw.githubusercontent.com/kirang89/awk-cookbook/deb918cc667403083920d0cefd27b19affe8ef94/cookbook.pdf


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