uniq

Last Updated on Tuesday, 09 June 2009 10:20

Article Index
1. Name
2. Synopsis
3. Frequently used options
4. Examples

1. Name

uniq [man page] - report or omit repeated lines

2. Synopsis

uniq [OPTION]... [INPUT [OUTPUT]] 

3. Frequently used options

-i, --ignore-case
      ignore differences in case when comparing
-u, --unique
      only print unique lines
 

4. Examples

Suppose we have a file with content:

$ echo -e "a\nb\nA\nc\nd\nc\nE\ne" > file 

unig command will print only unique lines within file: NOTE: Only consecutive lines counts as NOT unique.

$ uniq file 

Ignore differences in case when comparing a file:

$ uniq -i file 

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