Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

Linux’s /dev/MAKEDEV utility is useful for creating one or more

devices of a given type in a single command.

Options

--help

Print usage information and exit.

-m mode, --mode=mode

Set the file mode of the device, as with chmod. The default

mode is a=rw unless you have chosen other settings via

umask.

--version

Print version information and exit.

mkraid

mkraid [options] devices

System administration command. Set up RAID array devices as

defined in the /etc/raidtab configuration file. mkraid can be used to

initialize a new array or upgrade older RAID device arrays for the

new kernel. Initialization will destroy any data on the disk devices

used to create the array.

Options

-c file, --configfile file

Use file instead of /etc/raidtab.

-f, --force

Initialize the devices used to create the RAID array even if they

currently have data.

-h, --help

Print a usage message and then exit.

-o, --upgrade

Upgrade an older array to the current kernel’s RAID version.

Preserve data on the old array.

-V, --version

Print version information and then exit.

mkswap

mkswap [options] device

System administration command. Prepare swapspace on device:a

disk partition or a prepared file. This command can create old and

new style swap areas. The older style provides backward compati-

bility with 2.2 kernels, ...