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Fundamentals Of Linux

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Automate backups on Linux

If you utilize the UNIX operating system, you have already got access to very powerful tools for making custom backup solutions. The solutions during this article will assist you to perform easy to a lot of advanced and secure network backups victimization open-supply tools that square measure a part of nearly each UNIX operating system distribution.

Simple backups

This article follows a stepwise approach that's quite easy once you follow the essential steps.

Let's begin with an easy, nonetheless powerful archive mechanism on our thanks to a lot of advanced distributed backup resolution. Let's examine a handy script known as arc, which can enable North American country to make backup snapshots from a UNIX operating system shell prompt.

1. The arc shell script

a.) #!/bin/sh

b.) tar czvf $1.$(date +%Y%m%d-%H%M%S).tgz $1

c.) exit $?

The arc script obtains one file or directory name as a parameter and creates a constricted archive file with this date embedded into the coming archive file's name.

The use of the date command to enter a date and timestamp helps to prepare your archived files. The date format is Year, Month, Day, Hour, Minutes, and Seconds -- though the employment of the second's field is probably a small amount a lot of. read the person page for the date command (mandate) to find out regarding different choices. Also, in Listing one, we tend to pass the -v (verbose) choice to tar. This causes tar to show all of the files it's archiving. take away the -v choice if you would like the backup to proceed mutely.

2. Archiving the beoserver directory

a.) $ ls

b.) arc beoserver

c.) $ ./arc beoserver

d.) beoserver/

e.) beoserver/bookl.dat

f.) beoserver/beoserver_ab_off

g.) beoserver/beoserver_ab_on

h.) $ ls

i.) arc beoserver beoserver.20040321-014844.tgz

Advanced backups

This simple backup example is useful; but, it still includes a manual backup method. The industry's best practices suggest backing up usually, onto multiple media, and to separate geographic locations. The central plan is to avoid relying entirely on any single storage media or single location.

We'll tackle this challenge in our next example, wherever we'll examine a fictitious distributed network, illustrated in Figure one, that shows a computer user with access to 2 remote servers associated with an offsite information storage server.

Distributed network

The backup files on Server #1 and #2 are firmly transmitted to the offsite storage server, and also the entire distributed backup method can occur on an everyday basis while not human intervention. We'll use a collection of ordinary tools that square measure a part of the Open Secure Shell tool suite (OpenSSH), also because the tape archiver (tar), and also the cron task programming service. Our overall set up is to use cron for programming, shell programming and also the tar application throughout the backup method, OpenSSH secure shell (ssh) cryptography for remote access, and

authentication, and secure shell copy (SCP) to alter file transfers. make certain to review every tool's man page for added info.


 


 

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