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Top Forums UNIX for Dummies Questions & Answers X bytes of 0, Y bytes of random data, Z bytes of 5, T bytes of 1. ?? Post 302738755 by razolo13 on Sunday 2nd of December 2012 04:15:22 PM
Old 12-02-2012
X bytes of 0, Y bytes of random data, Z bytes of 5, T bytes of 1. ??

Hello guys. I really hope someone will help me with this one..


So, I have to write this script who:
- creates a file home/student/vmdisk of 10 mb
- formats that file to ext3
- mounts that partition to /mnt/partition
- creates a file /mnt/partition/data. In this file, there will be:
- X bytes of 0
- Y bytes of random data
- Z bytes of 1
- T bytes of 5
So, totally, the file's size, /mnt/partition/data will be X+Y+Z+T, where X,Y,Z,Y are parameters.

The big problem is with the XZTY bytes. I dont know how to make a file with X bytes of 0, Y bytes of random data, and so on.. Also how can I make a file ext3?
 

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CFDISK(8)							 GNU cfdisk Manual							 CFDISK(8)

NAME
GNU cfdisk - a curses-based partition table manipulation program SYNOPSIS
cfdisk [options] [device] DESCRIPTION
cfdisk is a disk partition manipulation program, which allows you to create, destroy, resize, move and copy partitions on a hard drive using a simple menu-driven interface. It is useful for organising the disk space on a new drive, reorganising an old drive, creating space for new operating systems, and copying data to new hard disks. For a list of the supported partition types, see the --list-partition-types option below. OPTIONS
-h, --help displays a help message. -v, --version displays the program's version. -a, --arrow-cursor use an arrow cursor, instead of reverse video highlighting, in case your terminal doesn't support it. -z, --new-table create a new partition table on the disk. This is useful if you want to change the partition table type or want to repartition you entire drive. Note that this does not delete the old table on the disk until you commit the changes. -u, --units=UNIT sets the default display units to UNIT. A list of possible units is given below. -t, --list-partition-types displays a list of supported partition types and features. UNITS
You can choose in what unit cfdisk should display quantities like partition sizes. You can choose from sectors, percents, bytes, kilobytes, etc. Note that one kilobyte is equal to 1,000 bytes, as this is consistent with the SI prefixes and is used by hard disk manufacturers. If you prefer to see the sizes in units with binary prefixes, you should instead select one kilo binary byte (kibibyte), which is equal to 1,024 bytes. Whatever display unit you have chosen, you can always enter the quantities in the unit of your choice, for example 1000000B or 1000kB. compact display each size in the most suitable unit from B, kB, MB, GB and TB. B one byte kB one kilobyte (1,000 bytes) MB one megabyte (1,000,000 bytes) GB one gigabyte (1,000,000,000 bytes) TB one terabyte (1,000,000,000,000 bytes) KiB one kilo binary byte (1,024 bytes) MiB one mega binary byte (1,048,576 bytes) GiB one giga binary byte (1,073,741,824 bytes) TiB one tera binary byte (1,099,511,627,776 bytes) s one sector. It depends on the sector size of the disk. You can use it if you want to see or choose the exact size in sectors. % one percent from the size of the disk cyl one cylinder. It depends on the cylinder size. chs use CHS display units. BUGS
There are no known bugs. We are in early stages for development, so be careful. SEE ALSO
fdisk(8), mkfs(8), parted(8) The cfdisk program is fully documented in the info(1) format GNU cfdisk User Manual manual. fdisk 16 June, 2006 CFDISK(8)
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