Explain @(#)cshrc 1.11 89/11/29 SMI


 
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Operating Systems Solaris Explain @(#)cshrc 1.11 89/11/29 SMI
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Old 08-13-2013
Explain @(#)cshrc 1.11 89/11/29 SMI

What does ' @(#)cshrc 1.11 89/11/29 SMI ' mean?
Can someone please deconstruct and explain the parts?
Code:
# @(#)cshrc 1.11 89/11/29 SMI

It is at the top of a the .cshrc of a new Solaris account I am working on.
I am familiar with using the first line of a script for setting the program/shell to use. Example: #!/bin/csh or #!/bin/sh or #!/ben/perl.
I am also familiar with leaving the first line blank or adding a comment. For .cshrc (opposed to my_script.csh) I just start with a # comment line.

Searching the internets, I see lots of examples of .cshrc posted that begin with this line, but I have not found anybody who explains what it is doing or where it comes from. The best I tell, it is just a comment. But why does it appear at the beginning of so many .cshrc files?

Last edited by fgrirx; 08-13-2013 at 07:02 PM.. Reason: bad grammer and misspelling
 
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which(1)							   User Commands							  which(1)

NAME
which - locate a command and display its pathname or alias SYNOPSIS
which [name]... DESCRIPTION
which takes a list of names and determines which alias or utility would be executed had these names been given as commands. For each name operand, if it names an alias the alias is expanded. Otherwise the user's path is searched for a utility name matching name. Aliases are taken from the user's .cshrc file. path is taken from the current shell execution environment. OPERANDS
The following operand is supported: name The name of a command to be located. EXIT STATUS
The following exit values are returned: 0 Successful completion. >0 One or more name operands were not located or an error occurred. FILES
~/.cshrc source of aliases and path values ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), attributes(5) DIAGNOSTICS
A diagnostic is given for names which are aliased to more than a single word, or if an executable file with the argument name was not found in the path. NOTES
The which utility is not a shell built-in command. BUGS
To compensate for ~/.cshrc files in which aliases depend upon the prompt variable being set, which sets this variable to NULL. If the ~/.cshrc produces output or prompts for input when prompt is set, which can produce some strange results. SunOS 5.11 30 Mar 2005 which(1)