view the file from bottom to top

Question

HI,

I know that cat prints the contents of the file on screen.

i never worked on linux.But i am aware that tac is the command to show the file from bottom to top.I am not even sure whether tac is on unix.Atleast on my unix box its not present. i want to know is there a simple command unix which gives the output from bottom to top?

i am expecting like below :

<command> file_name;

I know this can be done using some tools like awk,sed. but could anyone please tell me a most simple command to perform that task?

score 3 · Answer 1 · answered May 30 '11 at 08:17

3

The Unix equivalent of

tac

is

tail -r

Hope this helps

answered May 30 '11 at 08:17

Matyas

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score 1 · Answer 2 · answered Aug 16 '18 at 07:17

1

tac : Tac is opposite to cat in the sense that the output it produces is presented in a way that the last line is displayed first, then the second last line, and so on.

https://www.howtoforge.com/linux-tac-command/

answered Aug 16 '18 at 07:17

Amitesh Bharti

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score 1 · Answer 3 · answered May 30 '11 at 08:14

1

You can use tail -r

This probably should be moved to unix.stackexchange.com

answered May 30 '11 at 08:14

rcapote

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I am on Lubuntu here and my `tail` does not have the `-r` option. Now I even know why: the [POSIX specification for the tail command](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/tail.html) does *not* list a `-r` option, hence it must be an (unofficial?) extension (presumedly not even a GNU extension). – syntaxerror Sep 26 '14 at 00:56

score 0 · Accepted Answer · edited May 23 '17 at 12:29

0

tac is in GNU coreutils, and is presently the only single file executable that does what you want. If you don't have tac installed you'll need to use a slower alternative, like the ones outlined at How to reverse lines of a text file?

edited May 23 '17 at 12:29

Community

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answered May 30 '11 at 08:14

Femi

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view the file from bottom to top

4 Answers4