Can anybody help me with coursework Post: 302390169

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Homework and Emergencies Homework & Coursework Questions Can anybody help me with coursework Post 302390169 by astralito on Wednesday 27th of January 2010 05:14:32 AM

01-27-2010

Registered User

Can anybody help me with coursework

This is the coursework, in Technical University Sofia, Bulgaria prof. Koshmarov, sorry but the link to the course is broken. And this is the condition:

Code:

1. If the value of x is 5, and you have been set a new value as such 
       x="expr $x + 10", What would be the value of x? 
What would be the new value of the given variable if you had used single quotation marks and what should you do to obtain the same value in case of double quotation marks use? 
   
      2. Explain what would be the result of execution of the following command
       $ `date` 
   
      3. In the command prompt set the following value of the variable x:
         x='ls | more' или set x='ls | more' (C shell)
         Can you execute $x? Why?
         What is the difference between directory='pwd' and directory=`pwd`.
   
      4. How can you interprete the command
         set - *
         within a command procedure?
   
      5. If a given script is executed as foo -l -t bar[1-3], What would be the values of $# and $*? Will there be a difference if the options are combined?
   
      6. Write a script that archives the files in the current directory not being modified in the last six months. 
  (Instruction: Use the commands find and tar or cpio.)

Just one of these helps me very much.
Thank you people!

astralito

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LEARN ABOUT OSF1

pwd

pwd(1)							      General Commands Manual							    pwd(1)

NAME

       pwd - Displays the pathname of the current working directory

SYNOPSIS

       pwd

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       pwd:  XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       None

OPERANDS

       None

DESCRIPTION

       The  pwd  command  writes  to  standard	output	the full pathname of your current working directory.  All directories are separated by a /
       (slash).  The first / represents the root directory and the last directory named is your current working directory.

EXIT STATUS

       The following exit values are returned: Successful completion.  An error occurred.

ENVIRONMENT VARIABLES

       The following environment variables affect the execution of pwd: 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 format and contents of diagnostic mes-
       sages written to standard error.  Determines the location of message catalogues for the processing of LC_MESSAGES.

SEE ALSO

       Commands:  cd(1), csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p)

       Functions:  stat(2), getcwd(3)

       Standards:  standards(5)

																	    pwd(1)