- … @ suivre
Why backup data? …
To preserve your data, you will find several softwares that allow you to save, to synchronize or to view your data and retrieve them when necessary.
Each software is specific in its use and functions. You should find one that fits your requirements.
Remember : to install softwares on HandyLinux, the easiest way is to use the Software Center via HandyMenu > Raiders > Software Center.
Data backup used to be on diskettes, then on CD and then on DVD. Although you can stil use this kind of support, technology allows you to have access to much larger and cheap storage capacity.
Depending on the size of your data backup, you will find external hard drives ranging from 1GB (USB type) to 2TB (2000GB) self-powered (directly by the USB plug) or with external power supply. Prices vary between 4€ and 150€ depending on the capacity..
Of course, if your data fit on a CD (700MB), you can use a CD-RW (rewritable cdrom) for your backups.
You can also save your data on a remote server like cloud or dedicated server.
The softwares listed here offer you all the choice of backup media.
“Déjà Dup” is a simplified backup tool. It allows you to build secure backups of your data to a local folder, an external drive, or a local network either remote or “cloud” type.
It also allows the full encryption and protection by Password of your backup.
“Déjà Dup” has a very clear interface and does not require any computer knowledge.
“Déjà Dup” is good enough for a backup of your data. However, if you want to “backup your system”, including your applications or your whole installation, you need to go through a little more complex software described in the following chapters.
“Déjà Dup” is now available in the Applications list, see “Accessories” > “Backup”:
At first launch, a minimal interface prompts you to restore a recent backup or to go direct to your backup settings.
Backup Settings allow you to select the automation of the backups, the location of the backup files, the files to be saved, and the backup execution cycle:
Once your settings done, start the first backup clicking on “Backup Now” button of the “Overview” tab.
The first backup will be shorter or longer depending on the size of data to backup. Subsequent backups will be faster because they save only the files/folders that have been changed.
The password option choosen during settings allows entire encryption of your backup:
A notification is piplayed at the end of the process:
To restore a backup on a newly installed system, just install “Déjà Dup”, then choose “Restore” in the main window .
A serie of simple windows will help you find and restore your data:
Unison is a powerful bidirectional synchronization software that uses the principle of profiles.
Synchronization implies that if one file is modified in one of two folders, it will be also changed in the other folder at next synchronization.
The profile is a configuration file for a given synchronization. It contains directories to be synchronized and options. Uniso will apply this profile every time the program is launched. This principle allows to configure and perform different types of backup from the same software.
In the Profile selection window, select the task to be executed and then click “Open.”.
During the first synchronization, one of the two folders is empty… and this is normal. “Unison” will therefore show you a big window to warn you. Click on “confirm” to start the first scan of your folder to be synchronized:
After the warning is accepted, “Unison” scans the folders and displays the first synchronization:
Interface window description:
note : First line shows a red cross as the concerned folder “wallpaper” is a symbolic link to a file system. “Unison” does not follow symbolic links.
In the toolbar, click on “Go” to start synchronization:
The execution time depends on the volume of data to be synchronized. At first action, it may take long, but during the next synchronization only modified files will be copied … and will go much faster.
Results of a completed synchronization, with details of the non-synchronized element (symbolic-link):
Your two folders are now synchronized. Any file changes in one or the other folder will result in a modification of his brother - synchronized file.
You can, however, during the next synchronization, overide the default behavior of “Unison” using the toolbar; you will be allowed to ignore certain files (“Skip” button), or decide to completely ignore a file using the menu “Ignore”.
As said in intro, “Unison” is very powerful and has a bunch of options that are not useful for simple domestic synchronization.
For more information and use of the command line, I do invite you to visit the documentation détaillée.
If you want to backup only one file or few files, and they do not weigh more than 4GB, you can simply use your archive manager.
This manual method is reserved for “real” archives. Subsequent viewing of the data will involve the complete decompression of the archive.
From your “Thunar” files manager, select the folders to back up, then right-click on the selection, choose “Create an Archive…”.
Then you move the archive to an external media.
.. No, I'm kidding!!!… vocation of HandyLinux is not to make you do backups using the console .