Linux and UNIX Systems Configuration Help, How To, Tutorial and Basic Information

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whatis PDF Print E-mail
Tuesday, 16 March 2010 13:46
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Command whatis

Searches for whole words in the database whatis (see command apropos).

Syntax

whatis keyword

Options

no

Description

whatis command displays the result of search whole words in the database whatis (see description command apropos). Only the match whole words.

 
wc PDF Print E-mail
Tuesday, 16 March 2010 13:42
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Command wc

Displays the number of bytes, words and lines found in the file.

Syntax

wc [options] [files]

Options

-c displays only the number of bytes.
-w only shows the number of words.
-l displays only the number of rows.

Description

wc command displays the number of bytes, words and lines found in the file. If the input file is not specified, wc reads from standard input.

 
uptime PDF Print E-mail
Tuesday, 16 March 2010 13:38
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Command uptime

Displays the time of continuous operation of the system.

Syntax

uptime

Options

no

Description

uptime utility displays the current time, time of continuous operation of the system, the number of users in the system and the average system load over the last 1, 5, and 15 minutes.

 
uname PDF Print E-mail
Tuesday, 16 March 2010 13:34
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Command uname

Displays system information, such as the type of machine and operating system.

Syntax

uname [options]

Options

-a displays all the information.
-m displays the type of equipment (eg, i586).
-n displays the hostname of the machine.
-p displays the processor type (usually unknown).
-r displays the number of operating system release
-s displays the name of the operating system.
-v displays the version of the operating system (compilation date).

Description

The uname command displays various information about the machine and operating system (Linux).

 
unalias PDF Print E-mail
Tuesday, 16 March 2010 13:10
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Command unalias

Eliminates the abbreviation as defined previously by using the alias.

Syntax

unalias abbreviation

Options

no

Description

command unalias removes the abbreviation as defined previously by using the alias. Command unalias is a built-in command processor Bash.

 
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Thanks David Ayvazyan for provided useful information and discussions.
www.gnu.am (Armenian Translation)