Create a large file with a given size with a pattern in Linux

Question

In Linux how can I create a large file with a given text or hex pattern (Like DEADBEEFDEADBEEFDEADBEEF ....)

I know dd can be used to create large files but it doesn't write desired text or hex pattern

dd if=/dev/urandom of=/tmp/bigfile bs=blocksize count=size

or

dd if=/dev/zero of=/tmp/bigfile bs=blocksize count=size

Quickly create a large file on a Linux system?

How to create a file with a given size in Linux?

Answer 1

while true ; do printf "DEADBEEF"; done | dd of=/tmp/bigfile bs=blocksize count=size iflag=fullblock