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.

-p prototype

Apply the same settings as used for the specified user or

group: prototype.

-r Edit quotas on remote systems.

-t Edit grace times for block and inode quotas.

-T Edit grace times for individual user or group name.

-u Edit user quotas. (This is the default.)

egrep

egrep [options] [regexp] [files]

Search one or more files for lines that match an extended regular

expression regexp. egrep doesn’t support the regular expressions \(,

\), \n, \<, \>, \{, or \}, but it does support the other expressions, as

well as the extended set +, ?, |, and ( ). Remember to enclose these

characters in quotes. Regular expressions are described in

Chapter 7. Exit status is 0 if any lines match, 1 if none match, and

2 for errors.

See grep for the list of available options. Also see fgrep.

Examples

Search for occurrences of Victor or Victoria in file:

egrep 'Victor(ia)*' file

egrep '(Victor|Victoria)' file

Find and print strings such as old.doc1 or new.doc2 in files, and

include their line numbers:

egrep -n '(old|new)\.doc?' files

eject

eject [options] [device]

Eject removable media such as a CD-ROM, floppy, tape, or JAZ or

ZIP disk. You may name the device by its /dev or /mnt filename.

The /dev and /mnt prefixes are optional for any items in the /dev

and /mnt directories. If no