• perldoc -q rand
• rand
• shuffle

How do you want it randomised?

Given:

a b c d e
f g h i j
k l m n o
p q r s t
u v w x y
[download]

Do you want (randomise rows; columns stay the same):

k l m n o
u v w x y
f g h i j
p q r s t
a b c d e
[download]

Or (randomise the columns; rosw stay the same):

c b d e a 
h g i j f 
m l n o k 
r q s t p 
w v x y u
[download]

Or (randomise both):

h g i j f 
w v x y u 
c b d e a 
r q s t p 
m l n o k
[download]

Hi BrowserUk, I want to randomize the rows, i.e. the columns stay the same, can you help me? thank you

, can you help me?

Depends. Post code that reads the file into an array, then maybe.

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If you want to randomize rows only, read your file into an array of rows, apply shuffle from List::Util and print shuffled array into new file. That's all, probably just a one-liner, don't even need to chomp.