Create a file of a given size in linux

dd if=/dev/zero of=sparse_file bs=1024 skip=1024 count=1
If you're trying to create a sparse file, you can use dd by 'skip'ing to the last block instance. ls -ls shows the actual size vs. the reported size
Sample Output
ubahmapk@linux:~$ dd if=/dev/zero of=sparse_file skip=1024 bs=1024 count=1
1+0 records in
1+0 records out
1024 bytes (1.0 kB) copied, 4.6444e-05 s, 22.0 MB/s
ubahmapk@linux:~$ ls -lhs sparse
4.0K -rw-r--r-- 1 ubahmapk ubahmapk 1.0K 2010-10-23 19:25 sparse_file

By: ubahmapk
2010-10-24 00:28:34

3 Alternatives + Submit Alt

What Others Think

Create an alias for bash function mkfile { eval dd if=/dev/urandom of=$2 bs=1M count=$1 } mkfile
nublaii · 577 weeks and 3 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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