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.

-O featurelist

Use specified featurelist to create filesystem. The sparse_super

and filetype features are used by default on kernels 2.2 and

later. The following parameters may be given in a comma-

separated list:

dir_index

Use hashed B-trees to index directories.

filetype

Store file type information in directory entries.

has_journal

Create an ext3 journal. Same as using the -j option.

journal_dev

Prepare an external journaling device by creating an ext3

journal on device instead of formatting it.

sparse_super

Save space on a large filesystem by creating fewer super-

block backup copies.

-q Quiet mode.

-r revision

Set filesystem revision number to revision.

-S Write only superblock and group descriptors; suppress writing

of inode table and block and inode bitmaps. Useful only when

attempting to salvage damaged systems.

-T use

Set bytes-per-inode based on the intended use of the file-

system. Supported filesystem types are:

news

Four kilobytes per inode.

largefile

One megabyte per inode.

largefile4

Four megabytes per inode.

-v Verbose mode.

-V Print version number, then exit.

mkfifo

mkfifo [option] names

Make one or more named pipes (FIFOs) with the specified names.

Options

-m mode, --mode=mode

Set permission mode. Default is 666, with the bits in the

umask subtracted.

--help

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