69 lines
1.4 KiB
Markdown
69 lines
1.4 KiB
Markdown
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---
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title: Bash Sort
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---
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## Bash Sort
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Sort is one a simple and useful command which will rearrange the lines in a text file so that they are sorted, numerically and alphabetically. There are by default the following rules for sorting text:
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* numbers will appear befor a letter
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* letter that appears earlier in the alphabet will appear before a letter that appears later in the alphabet
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* lowercase letters will appear before lines with the same letter in uppercase
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The default rules of sorting can be changes by the options you provice to the command.
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### Usage
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```bash
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sort [options] [file_names]
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```
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Most used options:
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* `-b`, ignore leading blanks.
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* `-f`, fold lower case to upper case characters.
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* `-h`, compare human readable numbers (e.g., "2K", "1G").
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* `-r`, reverse the result of comparisons.
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* `-R`, sort in a random order
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### Example
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We have a file **data.txt**, which contains the following text:
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```bash
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apples
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oranges
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pears
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kiwis
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bananas
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```
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To sort the lines in the file alphabetically, use the following command:
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```bash
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sort data.txt
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```
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which will produce the following output:
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```bash
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apples
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bananas
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kiwis
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oranges
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pears
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```
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To reverse the sorting order, we using the `-r` flag.
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```bash
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sort -r data.txt
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```
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which will produce the following output:
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```bash
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pears
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oranges
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kiwis
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bananas
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apples
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```
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#### More Information:
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* Wikipedia: https://en.wikipedia.org/wiki/Sort_(Unix)
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