Create a file of a specific length

[SDS FDX]

What is the unix command in HP-UX to create a file of a certain length? I know that "touch" or "vi" will create a zero lenght file, but is there a way to create a file of a certain length in MB's?

Thanks

[Patrick Wallek]

'prealloc' will do what you need. 'man prealloc' for details.

'prealloc' works in BYTES. The basic syntax is:

# prealloc filename

So to create a file of approx. 1 MB (1,000,000 bytes):

# prealloc afile 1000000

[SDS FDX]

Thank you for your response.

[Stephen Keane]

Don't forget to allocate points if someone (not me) has answered your question!

[Prasad Joshi]

bash-2.02# dd if=/dev/zero of=/test bs=1024 count=1024
1024+0 records in
1024+0 records out

bash-2.02# du -k test
1024 test

[Prasad Joshi]

I think dd command will also help.
This is an example which creates a file of 1MB.

bash-2.02# dd if=/dev/zero of=/test bs=1024 count=1024
1024+0 records in
1024+0 records out

bash-2.02# du -k test
1024 test


Thanks & regards,
Prasad