11-25-2016
If you use a standard tool like rsync, you can have it only backup files in the src directory that are new, meaning that were not there the last time the backup was run. If your "latest config back up file" has a different name than the files that have already been copied, rsync (or many other backup programs) will automatically do what it sounds like you want. If the "latest config back up file" has the same name as a file that already exists in the mirror location, rsync will rename the older file (the one in the mirror location) with an extension you provide. If you want to have multiple incremental backups of a file with the same name, that can probably be done as well but I prefer to rename older versions of a file for clarity and book keeping purposes.
As rbatte1 suggests, more information would be helpful. At any rate, a backup solution should be designed with your recovery process in mind. What files you store, and where, and what they are called, etc, depends somewhat on the process you will need to involve should you ever have to use your backup files.
You will want a script to run that end of the business as well, and definitely practice using it before you need to use it.
LMHmedchem
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script(1) User Commands script(1)
NAME
script - make record of a terminal session
SYNOPSIS
script [-a] [filename]
DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
record is saved in the file typescript. See WARNINGS.
The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
when the forked shell exits or when Control-d is typed.
OPTIONS
The following option is supported:
-a Appends the session record to filename, rather than overwriting it.
NOTES
script places everything that appears on the screen in filename, including prompts.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
SEE ALSO
attributes(5)
WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
privileged user, that is, root. Be sure that typescript is not a link before running script.
SunOS 5.10 30 Jan 2004 script(1)