Tac

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Description

tac - concatenate and print files in reverse.

On this page we only give you a short introduction with a few examples. We encourage you to read the manual (man tac).


Example output

Output a file's content

$ tac file.txt
.... and here it ends

This is a simple text file

Hi there folks

Read from stdin

$ tac
Hi this is the first line
and this is the second
.. and I press control-d to close the file
.. and I press control-d to close the file
and this is the second
Hi this is the first line

Read from stdin and redirect to file

$ tac > file.txt 
Hi there

This is just some text 
 
/John Doe

.. don't forget to press control-d. If we output the file file.txt using cat we get:

$ cat file.txt 
/John Doe
 
This is just some text 

Hi there

.... and, of course, as a fun exercise we get the following if we use tac to output the content of the file.

$ tac file.txt 
Hi there

This is just some text 
 
/John Doe