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Top Forums UNIX for Dummies Questions & Answers Questions about a "wise" backup Post 302695185 by lambda on Saturday 1st of September 2012 11:00:41 PM
Old 09-02-2012
Questions about a "wise" backup

Hello forum, this is my first post here and i have some questions:

Some info about what kind of back up i want to make:

I would like to backup /home/lambda/projects and some config files in /home and /etc and a whole hard disc(music,photos,videos etc).

Since i want it to run it every Monday, i understand i must use cron, but i also want if for any reason on Monday 01:00 :

a)Hard disk(the one i want to take back up of) is not mounted, inform me with mail(1) so that i can mount it.

b)If computer is turned off, on next boot inform me with mail(1) that i have not made a backup that Monday.(by reading a log file of successful backups on boot)

c)If for any reason the back up was interrupted(reboot, electricity blackout), inform me again with mail(1).

d)If the backup was successful write to a log file that day-month-year-time that back up was successful and inform me with mail(1).

Since i also want to backup config files, this means that the filename is the same, but the content of the file might change.Or for example i might add some new photos to a file so the back up should be updated with the new photos. Some kind of synchronization that is. Smilie

1) Which are the best practices/tools for such backups(if there's a book/link for example)?

2) In terms of time, except for the size of the files, which other parameters matter for the duration of the backup? Smilie
 

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DELUSER(8)                                                    System Manager's Manual                                                   DELUSER(8)

NAME
deluser, delgroup - remove a user or group from the system SYNOPSIS
deluser [options] [--force] [--remove-home] [--remove-all-files] [--backup] [--backup-to DIR] user deluser --group [options] group delgroup [options] [--only-if-empty] group deluser [options] user group COMMON OPTIONS [--quiet] [--system] [--help] [--version] [--conf FILE] DESCRIPTION
deluser and delgroup remove users and groups from the system according to command line options and configuration information in /etc/deluser.conf and /etc/adduser.conf. They are friendlier front ends to the userdel and groupdel programs, removing the home directory as option or even all files on the system owned by the user to be removed, running a custom script, and other features. deluser and del- group can be run in one of three modes: Remove a normal user If called with one non-option argument and without the --group option, deluser will remove a normal user. By default, deluser will remove the user without removing the home directory, the mail spool or any other files on the system owned by the user. Removing the home directory and mail spool can be achieved using the --remove-home option. The --remove-all-files option removes all files on the system owned by the user. Note that if you activate both options --remove-home will have no effect because all files including the home directory and mail spool are already covered by the --remove-all-files option. If you want to backup all files before deleting them you can activate the --backup option which will create a file username.tar(.gz|.bz2) in the directory specified by the --backup-to option (defaulting to the current working directory). Both the remove and backup options can also be activated for default in the configuration file /etc/deluser.conf. See deluser.conf(5) for details. If you want to remove the root account (uid 0), then use the --force parameter; this may prevent to remove the root user by accident. If the file /usr/local/sbin/deluser.local exists, it will be executed after the user account has been removed in order to do any local cleanup. The arguments passed to deluser.local are: username uid gid home-directory Remove a group If deluser is called with the --group option, or delgroup is called, a group will be removed. Warning: The primary group of an existing user cannot be removed. If the option --only-if-empty is given, the group won't be removed if it has any members left. Remove a user from a specific group If called with two non-option arguments, deluser will remove a user from a specific group. OPTIONS
--conf FILE Use FILE instead of the default files /etc/deluser.conf and /etc/adduser.conf --group Remove a group. This is the default action if the program is invoked as delgroup. --help Display brief instructions. --quiet Suppress progress messages. --system Only delete if user/group is a system user/group. This avoids accidentally deleting non-system users/groups. Additionally, if the user does not exist, no error value is returned. This option is mainly for use in Debian package maintainer scripts. --only-if-empty Only remove if no members are left. --backup Backup all files contained in the userhome and the mailspool-file to a file named /$user.tar.bz2 or /$user.tar.gz. --backup-to Place the backup files not in / but in the directory specified by this parameter. This implicitly sets --backup also. --remove-home Remove the home directory of the user and its mailspool. If --backup is specified, the files are deleted after having performed the backup. --remove-all-files Remove all files from the system owned by this user. Note: --remove-home does not have an effect any more. If --backup is specified, the files are deleted after having performed the backup. --version Display version and copyright information. RETURN VALUE
0 The action was successfully executed. 1 The user to delete was not a system account. No action was performed. 2 There is no such user. No action was performed. 3 There is no such group. No action was performed. 4 Internal error. No action was performed. 5 The group to delete is not empty. No action was performed. 6 The user does not belong to the specified group. No action was performed. 7 You cannot remove a user from its primary group. No action was performed. 8 The required perl-package 'perl modules' is not installed. This package is required to perform the requested actions. No action was performed. 9 For removing the root account the parameter "--force" is required. No action was performed. FILES
/etc/deluser.conf Default configuration file for deluser and delgroup /usr/local/sbin/deluser.local Optional custom add-ons. SEE ALSO
adduser(8), deluser.conf(5), groupdel(8), userdel(8) COPYRIGHT
Copyright (C) 2000 Roland Bauerschmidt. Modifications (C) 2004 Marc Haber and Joerg Hoh. This manpage and the deluser program are based on adduser which is: Copyright (C) 1997, 1998, 1999 Guy Maor. Copyright (C) 1995 Ted Hajek, with a great deal borrowed from the original Debian adduser Copyright (C) 1994 Ian Murdock. deluser is free software; see the GNU General Public Licence version 2 or later for copying conditions. There is no warranty. Debian GNU/Linux Version 3.116ubuntu1 DELUSER(8)
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