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colcrt command in Linux with examples
  • Last Updated : 15 May, 2019

colcrt command in Linux systems is used to format the text processor output so that it can be viewed on Cathode Ray Tube displays. It removes underlining, strike-throughs and underscores, which can’t be displayed on CRTs since only one character can be produced at a given location on the CRT screen. It also places all the underscores on a new line, right under the original line.

Syntax:

colcrt [-] [-2] [file ...]

Note: For this article, we will be using the below-mentioned files to show the outputs of the colcrt command.

  • GFG_1:

  • geeksforgeeks.c

Options:

  • colcrt command with help option: The help option of colcrt command displays the usage/syntax of the colcrt command.
    colcrt -h

  • colcrt with ‘-‘ option: When colcrt is used with ‘ – ‘ option, the resulting output has all the special formatting (such as strikethrough, underscore, etc.) removed.

    Example 1:



    colcrt - GFG_1

    Example 2:

    colcrt - geeksforgeeks.c

  • colcrt with ‘-2’ option: When colcrt is used with ‘-2’ option, the resulting output has all the special formatting removed, with the underscores additionally being displayed in new lines. Also, a new empty line is added after every line, which makes the output more easily readable.

    Example 1:

    colcrt -2 GFG_1

    Example 2:

    colcrt -2 geeksforgeeks.c

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