├── .gitignore ├── LICENSE ├── README.md ├── _awk.sh ├── _awk_sed.sh ├── _sed.sh ├── scripts └── grades │ ├── avg-class-grade.awk │ ├── avg-grade.awk │ └── grades.txt └── text ├── duplicate-geek.txt ├── employee.txt ├── geek.txt ├── html.txt ├── numbers.txt ├── paths.txt ├── phones.txt └── table.txt /.gitignore: -------------------------------------------------------------------------------- 1 | ##################################################################### 2 | # PROJECT FILES 3 | ##################################################################### 4 | data/ 5 | 6 | 7 | ##################################################################### 8 | # SECRET FILES 9 | ##################################################################### 10 | 11 | 12 | 13 | ##################################################################### 14 | # JAVASCRIPT SPECIFIC 15 | ##################################################################### 16 | 17 | # PACKAGE MANAGEMENT 18 | node_modules/ 19 | bower_components/ 20 | 21 | # TEST COVERAGE 22 | lib-cov 23 | coverage 24 | 25 | # BUILD TOOLS 26 | [gG]ulpfile.js 27 | [gG]runtfile.js 28 | .grunt 29 | 30 | # CONFIGURATION 31 | .lock-wscript 32 | 33 | # BINARY 34 | build/Release 35 | 36 | 37 | ##################################################################### 38 | # MISCELLANEOUS FILES 39 | ##################################################################### 40 | 41 | # DISTRIBUTION (feel free to uncomment) 42 | build 43 | dist 44 | 45 | # DATABASE 46 | *.sqlite* 47 | 48 | # TEMP / CACHE 49 | temp 50 | .sass-cache 51 | .cache 52 | *.spec 53 | *.tmp 54 | *~ 55 | 56 | # RUNTIME DATA 57 | pids 58 | *.pid 59 | *.seed 60 | 61 | # LOGS 62 | [Ll]og* 63 | *.log 64 | 65 | # OS CRUFT 66 | .DS_Store 67 | thumbs.db 68 | ._* 69 | 70 | # DEVOPS 71 | .vagrant 72 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # sed-awk 2 | 3 | ## TLDR 4 | 5 | ```bash 6 | $ tldr sed 7 | sed 8 | Run replacements based on regular expressions. 9 | 10 | - Replace the first occurrence of a string in a file, and print the result: 11 | sed 's/find/replace/' filename 12 | 13 | - Replace only on lines matching the line pattern: 14 | sed '/line_pattern/s/find/replace/' 15 | 16 | - Replace all occurrences of a string in a file, overwriting the file (i.e. in-place): 17 | sed -i 's/find/replace/g' filename 18 | 19 | - Replace all occurrences of an extended regular expression in a file: 20 | sed -r 's/regex/replace/g' filename 21 | 22 | - Apply multiple find-replace expressions to a file: 23 | sed -e 's/find/replace/' -e 's/find/replace/' filename 24 | ``` 25 | 26 | ```bash 27 | $ tldr awk 28 | 29 | awk 30 | A versatile programming language for working on files. 31 | 32 | - Print the fifth column in a space separated file: 33 | awk '{print $5}' filename 34 | 35 | - Print the second column of the lines containing "something" in a space separated file: 36 | awk '/something/ {print $2}' filename 37 | 38 | - Print the third column in a comma separated file: 39 | awk -F ',' '{print $3}' filename 40 | 41 | - Sum the values in the first column and print the total: 42 | awk '{s+=$1} END {print s}' filename 43 | 44 | - Sum the values in the first column and pretty-print the values and then the total: 45 | awk '{s+=$1; print $1} END {print "--------"; print s}' filename 46 | ``` 47 | 48 | ## Useful Commands 49 | 50 | ```bash 51 | # List out the second column in the table. 52 | cat text/table.txt | sed 1d | awk '{ print $2 }' 53 | 54 | # Sum the columns in the table. 55 | cat text/table.txt | sed 1d | awk '{ sum += $2 } END { print sum }' 56 | 57 | # Kills all processes by name. 58 | ps aux | grep chrome | awk '{ print $2 }' | kill 59 | pkill chrome 60 | 61 | # Deletes trailing whitespace. 62 | sed 's/\s\+$//g' filename 63 | 64 | # Deletes all blank lines from file. 65 | sed '/^$/d' filename 66 | 67 | # Insert 'use strict' to the top of every js file. 68 | sed "1i 'use strict';" *.js 69 | 70 | # Append a new line at the end of every file. 71 | sed '1a \n' * 72 | 73 | # Generate random numbers and then sort. 74 | for i in {1..20}; do echo $(($RANDOM * 777 * $i)); done | sort -n 75 | 76 | # Commatize numbers. 77 | sed -r ':loop; s/(.*[0-9])([0-9]{3})/\1,\2/; t loop' text/numbers.txt 78 | ``` 79 | 80 | ## Tutorial 81 | Follow the tutorials here: 82 | - http://www.thegeekstuff.com/tag/sed-tips-and-tricks/ 83 | - http://www.grymoire.com/Unix/Sed.html 84 | - http://www.grymoire.com/Unix/Awk.html 85 | 86 | ```bash 87 | # Unzip data. 88 | unzip data.zip 89 | 90 | # Zip data. 91 | zip -r data.zip data/ 92 | 93 | # Preview the files. 94 | head data/names.csv && tail data/names.csv 95 | 96 | # Preview csv columns. 97 | sed -n 1p data/colleges.csv | tr ',' '\n' 98 | 99 | # Count the number of lines. 100 | wc -l data/* 101 | ``` 102 | 103 | ### Sed Print 104 | 105 | ```sh 106 | # Print contents of a file. 107 | sed -n '/fox/p' text/* 108 | sed -n '/Sysadmin/p' text/geek.txt 109 | 110 | # Print lines starting with `3` and skipping by `2`. 111 | sed -n '3~2p' text/geek.txt 112 | 113 | # Print the last line. 114 | sed -n '$p' text/geek.txt 115 | 116 | # Prints the lines matching the between the two patterns. 117 | sed -n '/Hardware/,/Website/p' text/geek.txt 118 | ``` 119 | 120 | ### Sed Print Line Number 121 | 122 | ```sh 123 | # Prints the line number for all lines in the file. 124 | sed -n '=' filename 125 | 126 | # Prints the line number that matches the pattern. 127 | sed -n '/Linux/=' filename 128 | 129 | # Prints the line number in range of two patterns (inclusive). 130 | sed -n '/Linux/,/Hardware/=' filename 131 | 132 | # Prints the total number of lines. 133 | sed -n '$=' filename 134 | ``` 135 | 136 | ### Sed Delete 137 | The `d` command performs a deletion. 138 | 139 | ```sh 140 | # Deletes the 3rd line from beginning of file. 141 | sed '3d' text/geek.txt 142 | 143 | # Delete every lines starting from 3 and skipping by 2. 144 | sed '3~2d' text/geek.txt 145 | 146 | # Delete lines from 3 to 5. 147 | sed '3,5d' text/geek.txt 148 | 149 | # Delete the last line. 150 | sed '$d' text/geek.txt 151 | 152 | # Delete lines matching the pattern. 153 | sed '/Sysadmin/d' text/geek.txt 154 | ``` 155 | 156 | ### Sed Substitute 157 | The `s` command performs a substitution. 158 | 159 | ```sh 160 | # Simple substituion for the first result. 161 | sed 's/Linux/Unix/' text/geek.txt 162 | 163 | # Simple substituion for global instances. 164 | sed 's/Linux/Unix/g' text/geek.txt 165 | 166 | # Replace nth instance. 167 | sed 's/Linux/Unix/2' text/geek.txt 168 | 169 | # Write matched lines to output. 170 | sed -n 's/Linux/Unix/gp' text/geek.txt > text/geek-sub.txt 171 | 172 | # Use regex group for capturing additional patterns (up to 9). 173 | sed 's/\(Linux\).\+/\1/g' text/geek.txt 174 | sed -r 's/(Linux).+/\1/g' text/geek.txt 175 | 176 | # Remove the last word. 177 | sed -r 's/\d$//g' text/geek.txt 178 | 179 | # Remove all letters. 180 | sed -r 's/[a-zA-Z]//g' text/geek.txt 181 | 182 | # Remove html tags (WIP). 183 | sed -r 's|()||g' text/html.txt 184 | 185 | # Commatize any number. 186 | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta' text/numbers.txt 187 | sed -r ':loop; s/\B[0-9]{3}\>/,&/; t loop' text/numbers.txt 188 | ``` 189 | 190 | ### Sed Transform 191 | The `y` command performs a transformation. 192 | 193 | ```sh 194 | # Converts all lowercase chars to uppercase. 195 | sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' text/geek.txt 196 | 197 | # Converts all uppercase chars to lowercase. 198 | sed 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/' text/geek.txt 199 | 200 | # Perform a two character shift. 201 | sed 'y/abcdefghijklmnopqrstuvwxyz/cdefghijklmnopqrstuvwxyzab/' text/geek.txt 202 | ``` 203 | 204 | ### Sed Multiple Commands 205 | The `-e` flag allows for multiple commands. 206 | 207 | ```sh 208 | sed -r -e 's/etc\.*//g' -e 's/(\s+)(\))/\2/g' text/geek.txt 209 | ``` 210 | -------------------------------------------------------------------------------- /_awk.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # 3 | # Description: 4 | # Examples of basic awk usage with the files in '/text'. 5 | # http://www.thegeekstuff.com/2010/01/awk-introduction-tutorial-7-awk-print-examples/ 6 | # 7 | # Syntax: 8 | # awk '/search pattern1/ {Actions} 9 | # /search pattern2/ {Actions}' file 10 | # 11 | 12 | # Command without search pattern will perform action on all lines. 13 | awk '{ print; }' text/employee.txt 14 | 15 | # Command without action will print the lines matching the pattern. 16 | awk '/Technology/' text/employee.txt 17 | sed -n '/Technology/p' text/employee.txt 18 | 19 | # Multiple patterns with regex. 20 | awk '/(Tech)|(Market)/' text/employee.txt 21 | 22 | # Print columns. $NF contains the number of columns. 23 | awk '{ print $2, $NF }' text/employee.txt 24 | 25 | # Multi-line block. 26 | awk 'BEGIN { print "Beginning this command"; } 27 | { print $2, $NF; } 28 | END { print "End of this command"; }' text/employee.txt 29 | 30 | # Same as above written as one line. 31 | awk 'BEGIN { print "Beginning this command"; } { print $2, $NF; } END { print "End of this command"; }' text/employee.txt 32 | 33 | # Find the employee with an id greater than 200. 34 | awk '$1 > 200' text/employee.txt 35 | 36 | # Match column to regex. 37 | awk '$4 ~ /[tT]echnology/' text/employee.txt 38 | 39 | # Sum columns. 40 | awk '{ s += $1; print $1} END { print s }' text/employee.txt 41 | 42 | # Sum column, only get result. 43 | awk '{ s += $1 } END { print s }' text/employee.txt 44 | 45 | # Sum columns with full syntax. 46 | awk 'BEGIN { s=0 } { s += $1 } END { print s }' text/employee.txt 47 | -------------------------------------------------------------------------------- /_awk_sed.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # Show all the male births in NY. 4 | sed -rn '/NY.+boy/p;' data/births.csv 5 | 6 | # Sum the number of male births in NY. 7 | sed -rn '/NY.+boy/p' data/births.csv | awk -F',' '{ s+=$4; } END { print s }' 8 | 9 | # Sum the numer of male births in NY since the year 2000. 10 | sed -rn '/NY.+boy/p' data/births.csv | awk -F',' '{ if ($1 >= 2000) s+=$4 } END { print s }' 11 | -------------------------------------------------------------------------------- /_sed.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # 3 | # Description: 4 | # Sed examples with the files in 'text/' 5 | # 6 | # Tutorials: 7 | # - http://www.grymoire.com/Unix/Sed.html 8 | # - http://www.thegeekstuff.com/tag/sed-tips-and-tricks/ 9 | 10 | #-=================================================================== 11 | # PRINT (p) 12 | # http://www.thegeekstuff.com/2009/09/unix-sed-tutorial-printing-file-lines-using-address-and-patterns/ 13 | # 14 | # Syntax: 15 | # sed -n 'ADDRESSp' filename 16 | # sed -n '/PATTERN/p' filename 17 | #-=================================================================== 18 | exit 19 | 20 | # Print contents of a file. 21 | sed -n '/fox/p' text/* 22 | sed -n '/Sysadmin/p' text/geek.txt 23 | 24 | # Print a specific line `N`. 25 | sed -n '3p' text/geek.txt 26 | 27 | # Negation. Print every line besides the 3rd line. 28 | sed -n '3!p' text/geek.txt 29 | 30 | # Print lines `3` to `5`. 31 | sed -n '3,5p' text/geek.txt 32 | 33 | # Print lines starting with `3` and skipping by `2`. 34 | sed -n '3~2p' text/geek.txt 35 | 36 | # Print the last line. 37 | sed -n '$p' text/geek.txt 38 | 39 | # Print lines `2` to the last line. 40 | sed -n '2,$p' text/geek.txt 41 | 42 | # Print lines matching the pattern until the specified line. 43 | sed -n '/Sysadmin/,3p' text/geek.txt 44 | sed -n '/Oracle/,5p' text/geek.txt 45 | 46 | # Print lines starting from `3` until it matches the pattern. 47 | sed -n '3,/Sysadmin/p' text/geek.txt 48 | 49 | # Print lines matching the pattern to the last line. 50 | sed -n '/Website/,$p' text/geek.txt 51 | 52 | # Prints the lines matching the pattern and the next '3' lines. 53 | sed -n '/Sysadmin/,+3p' text/geek.txt 54 | 55 | # Prints the lines matching the between the two patterns. 56 | sed -n '/Hardware/,/Website/p' text/geek.txt 57 | 58 | 59 | #-=================================================================== 60 | # PRINT LINE NUMBER 61 | # http://www.thegeekstuff.com/2009/11/unix-sed-tutorial-append-insert-replace-and-count-file-lines/ 62 | # 63 | # Syntax: 64 | # sed '=' filename 65 | # sed '/PATTERN/=' filename 66 | #-=================================================================== 67 | 68 | # Prints the line number for all lines in the file. 69 | sed -n '=' filename 70 | 71 | # Prints the line number that matches the pattern. 72 | sed -n '/Linux/=' filename 73 | 74 | # Prints the line number in range of two patterns (inclusive). 75 | sed -n '/Linux/,/Hardware/=' filename 76 | 77 | # Prints the total number of lines. 78 | sed -n '$=' filename 79 | 80 | 81 | #-=================================================================== 82 | # DELETE (d) 83 | # http://www.thegeekstuff.com/2009/09/unix-sed-tutorial-delete-file-lines-using-address-and-patterns/ 84 | # 85 | # Syntax (same as print): 86 | # sed 'ADDRESS'd filename 87 | # sed /PATTERN/d filename 88 | #-=================================================================== 89 | 90 | # Deletes the nth line from the file. 91 | sed '3d' text/geek.txt 92 | 93 | # Delete every lines starting from 3 and skipping by 2. 94 | sed '3~2d' text/geek.txt 95 | 96 | # Delete lines from 3 to 5. 97 | sed '3,5d' text/geek.txt 98 | 99 | # Delete the last line. 100 | sed '$d' text/geek.txt 101 | 102 | # Delete lines matching the pattern. 103 | sed '/Sysadmin/d' text/geek.txt 104 | 105 | 106 | #-=================================================================== 107 | # SUBSTITUTE (s) 108 | # http://www.thegeekstuff.com/2009/09/unix-sed-tutorial-replace-text-inside-a-file-using-substitute-command/ 109 | # 110 | # Syntax: 111 | # sed 'ADDRESSs/REGEX/REPLACEMENT/FLAGS' filename 112 | # sed '/PATTERN/s/REGEX/REPLACEMENT/FLAGS' filename 113 | # 114 | # Delimiter: 115 | # '/' can be replaced with any character (;@|-*~) as a delimiter. 116 | # 117 | # Flags: 118 | # -g - replace all instances of REGEX with REPLACEMENT 119 | # -n - replace the nth instance 120 | # -p - print line if a substituion was made 121 | # -i - case-insensitive substituion 122 | # -r - extended regex (preferred) 123 | # -w - write to file if a substituion was made 124 | #-=================================================================== 125 | 126 | # Simple substituion for the first result. 127 | sed 's/Linux/Unix/' text/geek.txt 128 | 129 | # Simple substituion for global instances. 130 | sed 's/Linux/Unix/g' text/geek.txt 131 | 132 | # Replace nth instance. 133 | sed 's/Linux/Unix/2' text/geek.txt 134 | 135 | # Write matched lines to output. 136 | sed -n 's/Linux/Unix/gp' text/geek.txt > text/geek-sub.txt 137 | 138 | # Replace parens with square brackets. 139 | sed 's/(/[/g; s/)/]/g' text/geek.txt 140 | sed -r 's/\((.+)\)/\[\1\]/g' text/geek.txt 141 | 142 | # Use & to access the pattern found. 143 | sed -r 's/[0-9]+/ (&) /g' text/numbers.txt 144 | 145 | # Use regex group for capturing additional patterns (up to 9). 146 | sed 's/\(Linux\).\+/\1/g' text/geek.txt 147 | sed -r 's/(Linux).+/\1/g' text/geek.txt 148 | 149 | # Remove parenthesis and everything inside. 150 | sed 's/(.\+)//g' text/geek.txt 151 | sed -r 's/\(.+\)//g' text/geek.txt 152 | 153 | # Remove only the parenthesis. 154 | sed 's/(\(.\+\))/\1/g' text/geek.txt 155 | sed -r 's/\((.+)\)/\1/g' text/geek.txt 156 | 157 | # Replace everything inside parenthesis with YOLO. 158 | sed -r 's/\(.+\)/\(YOLO\)/g' text/geek.txt 159 | 160 | # Remove the last 3 characters. 161 | sed 's/.\{3\}$//g' text/geek.txt 162 | sed -r 's/.{3}$//g' text/geek.txt 163 | 164 | # Remove the last word. 165 | sed -r 's/\d$//g' text/geek.txt 166 | 167 | # Remove all letters. 168 | sed -r 's/[a-zA-Z]//g' text/geek.txt 169 | 170 | # Remove number lists. 171 | sed -r 's/[0-9](\. )?//g' text/geek.txt 172 | 173 | # Remove all alphanumeric characters. 174 | sed -r 's/\w//g' text/geek.txt 175 | 176 | # Removes html tags. 177 | sed 's/<[^>]*>//g' text/html.txt 178 | 179 | # Remove html tags (intermediate). 180 | sed -r 's|()||g' text/html.txt 181 | 182 | # Replace value with parenthesis value. 183 | sed 's/ .\+(\(.\+\))/ \1/g' text/geek.txt 184 | 185 | # Commatize some numbers. Incorrect attempts. 186 | sed -r 's/([0-9]+)([0-9]{3}$)/\1,\2/g' text/numbers.txt 187 | sed -r 's/([0-9]*)([0-9]{3})+([0-9]{3}$)/\1,\2,\3/g' text/numbers.txt 188 | 189 | # Commatize any number. Example with labels and loops 190 | # http://shallowsky.com/blog/linux/cmdline/sed-insert-commas.html 191 | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta' text/numbers.txt 192 | sed -r ':loop; s/\B[0-9]{3}\>/,&/; t loop' text/numbers.txt 193 | 194 | 195 | #-=================================================================== 196 | # APPEND (a), INSERT (i), CHANGE (c) 197 | # http://www.thegeekstuff.com/2009/11/unix-sed-tutorial-append-insert-replace-and-count-file-lines/ 198 | # 199 | # Syntax: 200 | # sed 'ADDRESSa TEXT' filename 201 | # sed '/PATTERN/a TEXT' filename 202 | #-=================================================================== 203 | 204 | # Append examples. 205 | sed '1a hello world' text/geek.txt 206 | sed '/Linux/a TUX' text/geek.txt 207 | sed '$a this is the last line' text/geek.txt 208 | 209 | # Insert examples. 210 | sed '1i this will be inserted before line 1' text/geek.txt 211 | 212 | # Change examples, aka replace. 213 | sed '1c HAS BEEN REPLACED' text/geek.txt 214 | sed -r '/[wW]indows/c HAS BEEN HAXed' text/geek.txt 215 | 216 | 217 | #-=================================================================== 218 | # TRANSFORM 219 | # 220 | # Syntax: 221 | # sed 'y/abcd/ABCD/' filename 222 | #-=================================================================== 223 | 224 | # Converts all lowercase chars to uppercase. 225 | sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' text/geek.txt 226 | 227 | # Converts all uppercase chars to lowercase. 228 | sed 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/' text/geek.txt 229 | 230 | # Perform a two character step cipher. 231 | sed 'y/abcdefghijklmnopqrstuvwxyz/cdefghijklmnopqrstuvwxyzab/' text/geek.txt 232 | 233 | 234 | #-=================================================================== 235 | # MULTI-LINE OPERATIONS 236 | # http://www.thegeekstuff.com/2009/11/unix-sed-tutorial-multi-line-file-operation-with-6-practical-examples/ 237 | # 238 | # The '-e' flag allows for multiple commands. 239 | #-=================================================================== 240 | 241 | sed -r -e 's/etc\.*//g' -e 's/(\s+)(\))/\2/g' text/geek.txt 242 | 243 | # Detect consecutive duplicate lines and replace the newline with ' @ '. 244 | # - The curly braces are used to group sed commands. 245 | # - Begin by reading the first line and puts it in N. 246 | # - Then reads the next line separated by a new line (\n) and appends it to N. 247 | # - Lastly perform the substitution. 248 | sed -e '{ N; s/\n/ @ /; }' text/duplicate-geek.txt 249 | 250 | 251 | #-=================================================================== 252 | # CONTROL FLOW 253 | # http://www.thegeekstuff.com/2009/12/unix-sed-tutorial-6-examples-for-sed-branching-operation/ 254 | # 255 | # Syntax: 256 | # sed ':label command(s) b label' 257 | # sed ':label command(s) t label' 258 | #-=================================================================== 259 | 260 | # Commatize numbers. 261 | sed -r ':loop; s/(.*[0-9])([0-9]{3})/\1,\2/; t loop' text/numbers.txt 262 | -------------------------------------------------------------------------------- /scripts/grades/avg-class-grade.awk: -------------------------------------------------------------------------------- 1 | # awk -f avg-class-grade.awk grades.txt 2 | -------------------------------------------------------------------------------- /scripts/grades/avg-grade.awk: -------------------------------------------------------------------------------- 1 | # awk -f avg avg-grade.awk grades.txt 2 | 3 | { 4 | total = $3 + $4 + $5; 5 | avg = total / 3; 6 | grade = "C"; 7 | 8 | if (avg >= 90) grade = "A"; 9 | else if (avg >= 80) grade = "B"; 10 | else if (avg >= 70) grade = "C"; 11 | else if (avg >= 65) grade = "D"; 12 | else grade = "F"; 13 | 14 | print $1, "=>", grade; 15 | } 16 | -------------------------------------------------------------------------------- /scripts/grades/grades.txt: -------------------------------------------------------------------------------- 1 | Jones 2143 78 84 77 2 | Gondrol 2321 56 88 55 3 | RinRao 2122 38 37 4 | Edwin 2537 87 97 95 5 | Dayan 2415 30 47 6 | -------------------------------------------------------------------------------- /text/duplicate-geek.txt: -------------------------------------------------------------------------------- 1 | Linux Sysadmin 2 | Databases - Oracle, mySQL etc. 3 | Databases - Oracle, mySQL etc. 4 | Security (Firewall, Network, Online Security etc) 5 | 6 | 7 | Storage in Linux 8 | Website Design 9 | Website Design 10 | Windows- Sysadmin, reboot etc. 11 | -------------------------------------------------------------------------------- /text/employee.txt: -------------------------------------------------------------------------------- 1 | 100 Thomas Manager Sales $5,000 2 | 200 Jason Developer Technology $5,500 3 | 300 Sanjay Sysadmin Technology $7,000 4 | 400 Nisha Manager Marketing $9,500 5 | 500 Randy DBA Technology $6,000 6 | -------------------------------------------------------------------------------- /text/geek.txt: -------------------------------------------------------------------------------- 1 | 1. Linux - Sysadmin, Scripting etc. 2 | 2. Databases - Oracle, mySQL etc. 3 | 3. Hardware 4 | 4. Security (Firewall, Network, Online Security etc) 5 | 5. Storage 6 | 6. Cool gadgets and websites 7 | 7. Productivity (Too many technologies to explore, not much time available) 8 | 8. Website Design 9 | 9. Software Development 10 | 10. Windows - Sysadmin, reboot etc. 11 | 11. Linux - Sed tricks. 12 | -------------------------------------------------------------------------------- /text/html.txt: -------------------------------------------------------------------------------- 1 |

2 | The quick brown fox jumps over the lazy dawg. 3 |

4 | -------------------------------------------------------------------------------- /text/numbers.txt: -------------------------------------------------------------------------------- 1 | 1 2 | 10 3 | 100 4 | 1000 5 | 10000 6 | 100000 7 | 1000000 8 | 10000000 9 | 100000000 10 | 1000000000 11 | 10000000000 12 | 100000000000 13 | 1000000000000 14 | -------------------------------------------------------------------------------- /text/paths.txt: -------------------------------------------------------------------------------- 1 | /usr/kbos/bin:/usr/local/bin:/usr/jbin:/usr/bin:/usr/sas/bin 2 | /usr/local/sbin:/sbin:/bin/:/usr/sbin:/usr/bin:/opt/omni/bin: 3 | /opt/omni/lbin:/opt/omni/sbin:/root/bin -------------------------------------------------------------------------------- /text/phones.txt: -------------------------------------------------------------------------------- 1 | (555)555-1212 2 | (555)555-1213 3 | (555)555-1214 4 | (666)555-1215 5 | (666)555-1216 6 | (777)555-1217 -------------------------------------------------------------------------------- /text/table.txt: -------------------------------------------------------------------------------- 1 | rank length text 2 | 1 36 How quickly daft jumping zebras vex. 3 | 2 38 Jackdaws love my big sphinx of quartz. 4 | 3 44 The quick brown fox jumps over the lazy dog. 5 | --------------------------------------------------------------------------------