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Full Discussion: Requesting full back up scripts
Top Forums Shell Programming and Scripting Requesting full back up scripts Post 302380248 by burnie35 on Monday 14th of December 2009 03:54:04 PM
Old 12-14-2009
i am hoping to start a linux college course next year but wanted to have some experience before starting so got some past papers from a college student i know on some linux course questions (a few years old) and working through them. the edited question is a company wishes to to develop a new utility which will aid the users in backing up and restoring files in their own personal directory area. in doing this development, it should be recognised that script files are treated like any other i.e. they should be stored in a directory called scriptfiles.
only one utility is to be developed
the utility will give the user the option to back upor restore a set of files
the utility will give the user the ability to specify which type of file is to be used in particular back up or restore session.
the utility should be robust with respect to files and directories and the possible overwriting of files
i'm sorry for the size of the question but did not know what to leave out
thanks for any help
 

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LEARN ABOUT CENTOS

sulogin

SULOGIN(8)						       System Administration							SULOGIN(8)

NAME

       sulogin - Single-user login

SYNOPSIS

       sulogin [options] [tty]

DESCRIPTION

       sulogin is invoked by init when the system goes into single user mode.

       The user is prompted:

	    Give root password for system maintenance
	    (or type Control-D for normal startup):

       sulogin	will  be  connected  to  the  current terminal, or to the optional tty device that can be specified on the command line (typically
       /dev/console).

       After the user exits the single-user shell or presses control-D at the prompt, the system will continue to boot.

OPTIONS

       -e, --force
	      If the default method of obtaining the root password via getpwnam(3)  from  the  system  fails,  manually  examine  /etc/passwd  and
	      /etc/shadow to get the password.	If they are damaged or nonexistent, sulogin will start a root shell without asking for a password.

	      Only use the -e option if you are sure the console is physically protected against unauthorized access.

       -p, --login-shell
	      Specifying this option causes sulogin to start the shell process as a login shell.

       -t, --timeout seconds
	      Specify the maximum amount of time to wait for user input.  By default, sulogin will wait forever.

       -h, --help
	      Print a help message.

       -V, --version
	      Output version.

ENVIRONMENT VARIABLES

       sulogin looks for the environment variable SUSHELL or sushell to determine what shell to start.	If the environment variable is not set, it
       will try to execute root's shell from /etc/passwd.  If that fails it will fall back to /bin/sh.

AUTHOR

       sulogin was written by Miquel van Smoorenburg for sysvinit and later ported to util-linux by Dave Reisner and Karel Zak.

AVAILABILITY

       The sulogin command is part of the util-linux package and is available  from  Linux  Kernel  Archive  <ftp://ftp.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux							     Jul 2012								SULOGIN(8)
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