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Randomize lines in a file

Terminal - Randomize lines in a file
awk 'BEGIN{srand()}{print rand(),$0}' SOMEFILE | sort -n | cut -d ' ' -f2-
2009-05-29 01:20:50
User: axelabs
Functions: awk cut sort
Randomize lines in a file

This appends a random number as a first filed of all lines in SOMEFILE then sorts by the first column and finally cuts of the random numbers.


There are 4 alternatives - vote for the best!

Terminal - Alternatives
2010-09-16 12:45:28
User: dooblem
Tags: random shuf

shuf is in the coreutils package

2010-09-16 22:29:27
User: miniker84
Functions: sort

Works in sort (GNU coreutils) 7.4, don't know when it was implemented but sometime the last 6 years.

sort --random-sort file
2011-12-10 20:28:54
User: arld101
Functions: sort
Tags: sort random

Seeing that _sort_ its been used, why not just _use_ it. ;)

Know a better way?

If you can do better, submit your command here.

What others think

Interesting bit of fu but

sort -R

is much quicker.

Comment by TheMightyBuzzard 331 weeks and 2 days ago
Comment by talkiwalki 331 weeks and 2 days ago

Sort had no -r flag on the solaris box I was on and I've previously not heard of 'shuf'.

Comment by axelabs 330 weeks ago

is probably the shorter way

Comment by Josay 329 weeks and 3 days ago

Your point of view

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