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.

Options

-c size

Specify hash or B-Tree cache size.

-C file

Look up TrustedUser in the specified sendmail configuration

file.

-d Allow duplicate entries. Valid only with btree type maps.

-D x

Treat x as the comment marker instead of #.

-e Allow empty value data fields.

-f Suppress conversion of uppercase to lowercase.

-l List supported map types.

-N Append the zero-byte string terminator specified in send-

mail’s configuration file to mapped entries.

-o Append to existing file instead of replacing it.

-r If some keys already exist, replace them. (By default,

makemap will exit when encountering a duplicated key.)

-s Ignore safety checks.

-t delimiter

Use delimiter instead of whitespace.

-u Undo a map: print out the specified database file, one entry

per line.

-v Verbose mode.

man

man [options] [section] [title]

Display information from the online reference manuals. man

locates and prints the named title from the designated reference

section.

Traditionally, manpages are divided into nine sections, where

section 1 consists of user commands, section 2 contains system

calls, and so forth. By default, all sections are consulted, so the

section option serves to bypass the most common entry and find an

entry of the same name in a different section (e.g., man 2 nice).

Numerous other ...