Linux to reset command uniq

The Linux uniq command is used to check and delete duplicate rows in a text file.

Uniq can check for repeated rows and columns in a text file.

Grammar

Uniq [-cdu][-f< field >][-s< character position >][-w< character position >][--help][--version][input file [output file]

Parameters :

-C or--count displays the number of occurrences of the row next to each column. -D or--repeated displays only the rows that appear repeatedly. -F< fields > or--skip-fields=< fields > ignores the column specified by comparison. -S< character position > or--skip-chars=< character position > ignores comparison of specified characters. -U or--unique only show one row at a time. -W< character position > or--check-chars=< character position > Specifies the character to compare. --help display Help. --version Displays version information. [Input file] Specifies a sorted text file. [Output FILE] Specifies the output file. 

Instance

In the file testfile, line 2nd, line 5th, and 9th behave identically, use the uniq command to delete duplicate rows, using the following command:

The original content in Testfile is:

Cat Testfile       # Original content  : 95               85    

After you delete the duplicate rows using the Uniq command, you have the following output:

uniq testfile      # Delete duplicate line contents  85     

Checks the file and deletes the duplicate rows in the file and displays the number of occurrences of the row at the beginning of the line. Use the following command:

The resulting output is as follows:

uniq-ctestfile       # Delete duplicate rows after   3 Test             # # The meaning of the preceding number is 3 times  for the line 4 Hello # # The meaning of the            preceding number is 4  occurrences for the line 2 Linux 85            

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Linux go to heavy command Uniq (GO)