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create a file a set size ?

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Old 30 May 2003, 10:40 AM
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Denzil_Dog
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anybody know how to quickly create a file a set filesize ?
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Old 30 May 2003, 10:49 AM
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stevencotton
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Just create as normal and fill it up with something, easiest way is with some language. 5kB file:

perl -e 'print 0 x (5 * 1024)' > file
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Old 30 May 2003, 01:49 PM
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Denzil_Dog
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cheers steve worked a treat, created the file on a sun box

i needed a std 2MB file for download testing

thanks again dude
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Old 30 May 2003, 02:55 PM
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bashful
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Beware that some WANs have some built-in compression - a file of zeros would squish up lovely and give you a false impression of the speed. On a unix box you could try dd if=/dev/random (etc. etc.)
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Old 30 May 2003, 03:21 PM
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orbv
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mkfile 2m <filename>
dd if=/dev/zero of=<filename> bs=10k count=200

both will create different file sizes
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