Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

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--output-delimiter=string

Use string as the output delimiter. By default, the output

delimiter is the same as the input delimiter.

--help

Print help message and exit.

--version

Print version information and exit.

Examples

Extract usernames and real names from /etc/passwd:

cut -d: -f1,5 /etc/passwd

Find out who is logged on, but list only login names:

who | cut -d" " -f1

Cut characters in the fourth column of file, and paste them back as

the first column in the same file:

cut -c4 file | paste - file

cvs

cvs [options] cvs-command [command-options] [command-args]

CVS (Concurrent Versions System) is a version-control system.

Like earlier version-control systems such as RCS, CVS tracks

versions, permits the storage and retrieval of earlier versions, and

allows tracking of the history of a file or an entire project. In addi-

tion, it permits multiple users on different systems across a

network to work in a file simultaneously and merge their changes.

All CVS commands start with cvs, followed by any global options,

the command to execute, and any command options or argu-

ments. For more information on CVS and its commands, see

Chapter 13.

date

date [options] [+format] [date]

Print the current date and time. You may specify a display format.

format can consist of literal text ...