Backup and restore in linux pdf

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backup and restore in linux pdf

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25 Outstanding Backup Utilities for Linux Systems in 2020

Skip to content. Skip to navigation. See this memo for more details. There are three ways you may be able to back up your files to tape on a Unix system. In all cases, the zero indicates the first tape drive, 1 the second and 2 the third. Check labels on drives, or ask if you're not sure. Note that you could redirect the output of the table of contents listing into a file, or pipe it into a printing command or a screen-pager program like less.

That way you could make it easier to read through, or save it permanently. NOTE : do not add the verbose flag v to the tar options on this command; the standard output is used as the output and any messages will end up corrupting the resulting tape archive! Any of these should work considerably faster than the fourth, unmentioned alternative: using NFS on the machine with the tape drive to access the disk you want.

While this works, it is very noticeably slower. If you do not want to back up the whole current directory and all subdirectories, you can specify a list of files to choose, e.

If you are using GNU tar on Linux, tar is GNU tar , you can automatically compress or "gzip" the tape by adding a z to the options in the examples, e. It is prudent to re-direct the output of your session to a file for reference, in case you need to restore files later.

Add a "z" after the "tvf" if you know data on the tape was gzipped. It's important you specify the names exactly as they appear in the "tvf" listing; use a leading dot slash if one appears.

If you request a directory, it and its contents will be recursively restored. Within each of these, there may be various subtypes; for example, there are four subtypes of 4mm DDS drive, each with different native capacity.

The table below summarizes the formats. Many of our drives support compression. This is a feature where the digital electronics in the drive itself will compress the data prior to recording it. While this is useful for backups, it is not particularly desirable for data interchange, or if you may have to use a different, perhaps less capable or incompatible drive, to restore from. Therefore, we recommend that you either use compression with caution, or not at all.

Please contact your local Helpdesk to make arrangements. Staff Policies Diversity. Advanced Search…. This backs up the current directory and all subdirectories. Backs up current directory to the device on remote system "valen". DLT Most drives will read what's on the tape at the correct density and compression setting. For writing, you have to specify the right device name for the density you want if relevant. On Linux, you use the mt setdensity command to change the density if you wish to write at some setting other than the default density.

Multiple densities is only relevant for Exabyte x, 9-track and DLT drives and we hope you are not going to use the 9-track to write anything!!! The new VXA drive will not accept Exabyte 8mm cartridges. It will summarily spit them back at you.

This is different than the situation for other formats, where software sets the density. Here RW indicated read and write ability, R indicates readonly ability, and a - hyphen indicates you can't use that cartridge in that tape drive. If you go against this table, the drive may spit the tape back at you, or possibly give a "write protected" error.

You should never use video or audio quality media in the DDS or Exabyte drives. Only use data certified cartridges for 8mm and 4mm drives; the latter will have the DDS-n logo and the former will have "Computer Grade" or similar markings.

Compression Many of our drives support compression. There are no industry-wide standards for compression in tape drives at this time.

Visitor Tape Drives Please contact your local Helpdesk to make arrangements. Info Services Contacts. Navigation Data Backup. Digital Linear Tape.

Backups to Tape on Linux

System Tar and Restore is a versatile system backup script for Linux systems. It comes with two bash scripts, the main script star. To install System Tar and Restore program, you need to first install all the required software packages as listed below. First create a directory where your system backup files will be stored you can actually use any other directory of your choice. The final example show how to run it in transfer mode 2. The new option here is -b , which sets the boot partition. We have just looked a few basic options of System Tar and Restore script, you can view all available options using the following command.

This guide describes both options. The example application used in this guide is WordPress, although the steps outlined below will work for any application. If required, log in using your database access credentials. Select the database to be backed up from the list in the left navigation pane. On the resulting page, select "Quick" as the export method and "SQL" as the output format. Click "Go" to proceed. Once done, the browser will prompt you to download it to the desktop.


bzip2 compressed PDF (US letter format). The basic procedure is set out in W. Curtis Preston, Unix Backup & Recovery, O'Reilly & Associates,


Documentation

Before exploring methods particular to CentOS for deploying a standard backup plan, let's first discuss typical considerations for a standard level backup policy. The first thing we want to get accustomed to is the backup rule. Throughout the industry, you'll often hear the term backup model.

This chapter explains the fundamental concepts involved in Oracle Secure Backup backup and restore operations. This chapter contains the following topics:. This section describes how Oracle Secure Backup can back up and restore the file system. It contains the following sections:. File system data can be defined as the collection of files and file management structures on physical or logical storage.

Backups have two distinct purposes. The primary purpose is to recover data after its loss, be it by data deletion or corruption. Data loss is a very common experience of computer users. The secondary purpose of backups is to recover data from an earlier time, according to a user-defined data retention policy, typically configured within a backup application for how long copies of data are required. Backup is the most important job of a system administrator as a system admin it is your duty to take a backup of the data every day.

Definition: Backing Up and Restoring File Systems

Unix and Linux backup and restore can be done using backup commands tar, cpio ufsdump, dump and restore.

Backup Commands in Linux & Unix with Usage and Examples

In information technology , a backup , or data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is " back up ", whereas the noun and adjective form is " backup ". A backup system contains at least one copy of all data considered worth saving.

Skip to content. Skip to navigation. See this memo for more details. There are three ways you may be able to back up your files to tape on a Unix system. In all cases, the zero indicates the first tape drive, 1 the second and 2 the third. Check labels on drives, or ask if you're not sure. Note that you could redirect the output of the table of contents listing into a file, or pipe it into a printing command or a screen-pager program like less.

Backup on personal computers or servers is always important to prevent permanent data loss. Therefore getting to know different backup tools is very important especially for System Administrators who work with large amounts of enterprise-level data and even on personal computers. It is always a good practice to keep on backing up data on our computers, this can either be done manually or configured to work automatically. Many backup tools have different features that allow users to configure the type of backup, time of backup, what to backup, logging backup activities and many more. In this article, we shall take a look at 25 outstanding backup tools that you can use on Linux servers or systems.

Backup & Restore

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Linux Backup/Restore

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