topic Re: how to create dump file in Operating System - Linux

how to create dump file

avizen9 — Wed, 19 Aug 2009 04:31:23 GMT

Hello,
i need to create dump file around 100mb for some testing purpose, how to create it.

i have done this before but forgot :),

surely assign point for each response,

Re: how to create dump file

Steven Schweda — Wed, 19 Aug 2009 04:48:21 GMT

Define "dump file".

What do you want in the file?

"m" = milli. "M" = mega.
"b" = bit. "B" = byte.
"mb" = millibit, which is a pretty small
unit. (Too small to be useful, in fact.)

Re: how to create dump file

Vitaly Karasik_1 — Wed, 19 Aug 2009 08:18:48 GMT

do you mean "crash dump" file or just big file?
- in 1st case - send "create dump" signal to some big (100mb) process, for example

kill -ABRT pid_of_process

(ulimit should allow it - "ulimit -c unlimited")

- in 2nd case
dd if=/dev/zero of=/tmp/100mb bs=1024k count=100

Re: how to create dump file

Viktor Balogh — Thu, 20 Aug 2009 14:31:58 GMT

there is a command for preallocating disk space, see 'man prealloc'