How do I create a empty file that is 30 mb? 1

[Jonathan777]

How to use touch command?

 

[trunix]

The touch command will create an empty file or update the date of an existing file. To create a file of a certain size you need to use the mkfile command

e.g mkfile 30m myfile

 

[cfsalmeida]

just one more thing, if you need to create large empty file, "mkfile" is very slow, because the file is padded with zeros by default, so in this cases maybe it will be better use something like:

#dd if=/dev/zero of=/myfile bs=1024k count=30

for the 30m example.

Regards,

Carlos Almeida,

 

[tdatgod]

dd if=/dev/zero of=myfile bs=1024k count=30

if -- input filename
of -- output filename
bs -- block size
count -- number of blocks to write.