what does $#,$* means Post: 302302821

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Top Forums UNIX for Advanced & Expert Users what does $#,$* means Post 302302821 by ansnaveen on Wednesday 1st of April 2009 06:24:01 AM

04-01-2009

Registered User

To your problem I suggest in following way:

Basically, there are two ways of reading inputs:
Type 01: Command Line
Type 02: Interactive way
Your problem is pertaining to the Type 01: this is method is used when we do not know the numbers of arguments that are present in the command line prompt. For this shell uses positional parameters like $0, $*, $#, $?, etc .
E.g. 01:
echo �The Number of Arguments: $#�
echo �The List of Arguments�
for i in $*
do
echo $i
done

E.g. 02:
echo �The Number of Arguments: $#�
echo �The List of Arguments�
for i
do
echo $i
done

In the Type 02 method usually we are reading the inputs through read construct of shell and print the variable using for loop as fallows:
E.g. 01
echo �Enter the argument1�
read a
echo �Enter the argument2�
read b
for i in $a $b
do
echo $i
done

ansnaveen

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LEARN ABOUT MOJAVE

vconsole.conf

VCONSOLE.CONF(5)                                                   vconsole.conf                                                  VCONSOLE.CONF(5)

NAME

       vconsole.conf - configuration file for the virtual console

SYNOPSIS

       /etc/vconsole.conf

DESCRIPTION

       The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font.

       The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is
       possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported,
       allowing applications to read the file without implementing a shell compatible execution engine.

       Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=,
       vconsole.font.unimap= may be used to override the console settings at boot.

       Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only
       as fallback.

OPTIONS

       The following options are understood:

       KEYMAP=, KEYMAP_TOGGLE=
           Configures the key mapping table of for they keyboard.  KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured
           a second toggle keymap and is by default unset.

       FONT=, FONT_MAP=, FONT_UNIMAP=
           Configures the console font, the console map and the unicode font map.  FONT= defaults to latarcyrheb-sun16.

EXAMPLE

       Example 1. German keyboard and console

       /etc/vconsole.conf:

           KEYMAP=de-latin1
           FONT=latarcyrheb-sun16

SEE ALSO

       systemd(1), loadkeys(1), setfont(8), locale.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
           Developer

systemd                                                             10/07/2013                                                    VCONSOLE.CONF(5)