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Full Discussion: Help: Backfile if backup does not exist
Top Forums Shell Programming and Scripting Help: Backfile if backup does not exist Post 302677205 by xshellscriptx on Wednesday 25th of July 2012 05:57:49 PM
Old 07-25-2012
Help: Backfile if backup does not exist
I am trying to work on a script that will first check to see if a backup of a file exists, and if it does it will prompt the user to ask if he/she wants it replace. Of course, if the user says no then the file should be skipped.

Here is the code I have written. Does it look as if it is working correctly?

Code:
#! /bin/bash
echo "Beginning backup of files..."
# Check to see if files exist
if [ -f /home/user/Documents/backup.tar.gz ]; then
    read -p "Backup file already exists. Replace (y/n)?"
    [ "$REPLY" != "y" ] || tar -czf /home/user/Documents/backup.tar.gz /home/user/Documents/files
else
    tar -czf /home/user/Documents/backup.tar.gz /home/user/Documents/files
fi
echo "Backup complete."

 

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LEARN ABOUT OSF1

backup_quit

BACKUP_QUIT(8)						       AFS Command Reference						    BACKUP_QUIT(8)

NAME

       backup_quit - Leaves interactive mode

SYNOPSIS

       quit [-help]

       q [-h]

DESCRIPTION

       The backup quit command exits interactive mode, returning the issuer to the regular shell prompt at which the backup or backup interactive
       command was issued to enter interactive mode. The command has no effect when issued outside interactive mode. Issuing the Ctrl-D command
       also exits interactive mode.

CAUTIONS

       To exit interactive mode, all jobs must be completed. Use the backup jobs command to list any jobs currently pending or executing, and the
       backup kill command to terminate them as necessary.

OPTIONS

       -help
	   Prints the online help for this command. All other valid options are ignored.

EXAMPLES

       The following command exits interactive mode:

	  backup> quit
	  %

PRIVILEGE REQUIRED

       None

SEE ALSO

       backup(8), backup_interactive(8), backup_jobs(8), backup_kill(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							    BACKUP_QUIT(8)
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