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Top Forums UNIX for Dummies Questions & Answers what is the use of Environment variables Post 4355 by indianguru on Tuesday 24th of July 2001 01:49:42 PM
Old 07-24-2001
Data what is the use of Environment variables

what is the actual use of environment variables.
I know only PS1, LOGNAME, PS2 variables
what are the other variables & what is there use
 

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logname(1)						      General Commands Manual							logname(1)

NAME
logname - Displays user login name SYNOPSIS
logname STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: logname: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None OPERANDS
None DESCRIPTION
The logname command writes to standard output the name you used to log into the system. NOTES
The logname command explicitly ignores the LOGNAME environment variable to avoid erroneous results from environment changes. EXIT STATUS
The following exit values are returned: Successful completion. The getlogin() utility would fail. ENVIRONMENT VARIABLES
The following environment variables affect the execution of *cmd*: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the for- mat and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: id(1), env(1), login(1), who(1) Functions: getlogin(2) Standards: standards(5) logname(1)
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