Easy backup method for a Linux server

Posted in Debian, English tutorials, Latest news on February 20th, 2011 by yokke

Do I need backup?

Off course you need to backup your data! If you don’t have backups, you don’t have data security!

Depending on the value of your data you will need to make more backups or keep them longer or whatever. You should always ask yourself the question what if I lose all my data? Which data is extremely important.

You can make a backup of various data, for example:

  • The operating system
  • The storage server (RAID 5 = NO BACKUP!)
  • Mail server
  • SQL server
  • Web server

When you lose a server or its data you should be able to restore your data in a few hours. You can’t make it to lose all your data. When you are working in a professional environment you will notice that there is a backup plan (if not create one!). This plan indicates how often backups should be made and where they are stored.

When you make a backup never save this on the same disk as the original disk. If you do this, in case of a disk failure you will lose all your data + all your backup data. Therefor its important to have a backup disk or a backup server.

Backup is very important but whats even more important is the restore procedure. In case of a failure you will rely on your backups and you need to restore everything.

You should test if your backups work, test if they still work after you restored them. At least once each year you should test if your backup & recovery plan is working. By testing it, you will be familiar with the procedure and its problems. You can also indicate the time it takes to be up & running again. (Your management will demand answers when things go wrong, be prepared!)

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Server network statistics

Posted in Debian, English tutorials, Latest news on February 15th, 2011 by yokke

When you build a network, over time this network will grow. This is why it’s important to keep statistics. So you can expand before you run out of space or bandwidth.

Under Linux there are a few ways to do this. One of them I’m going to explain today.

The program I’ve found on the internet doesn’t do anything more than monitor your network traffic. The program runs under every Linux distribution.

At the beginning of this tutorial I would like to say that this is just a basic tool. Later on I will provide a detailed tool that uses snmp to make statistics.

In this tutorial I’m going to demonstrate how you can install vnStat under Debian 6.0.

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Will Btrfs be the new filesystem?

Posted in Debian, Latest news on February 14th, 2011 by yokke

Will Btrfs be the new file system?

We all know that an operating system need a file system to provide access to the disks. So what is a file system? A file system (often also written as filesystem) is a method of storing and organizing computer files and the data they contain to make it easy to find and access them. The most known examples are:

  • FAT
  • FAT 32
  • NTFS
  • EXT
  • EXT2
  • EXT3
  • EXT4
  • ZFS (Oracle)

Btrfs (“B-tree file system,” pronounced “Butter F S”) is a GPL-licensed copy-on-write file system for Linux announced by Oracle in 2007. This filesystem is still under heavenly development and is NOT ready to be used in an production environment. Btrfs is licensed under the GPL and open for contribution from anyone. Btrfs can do raid0, raid1, raid10. When blocks are read in, checksums are verified and if there are any errors, Btrfs tries to read from an alternate copy.

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Dutch tutorials

Posted in Latest news on February 9th, 2011 by yokke

Due my lack of time I’ve posted the dutch raid tutorial again. I’m going to rewrite it in the next couple of weeks but right now I need it to prove that I can document how I implement projects.

My next big tutorial will be about btrfs. Currently researching this filesystem and I must admit so far I really like it!

Tags:

Debian 6.0

Posted in Debian, Latest news on February 7th, 2011 by yokke

Debian 6.0

Debian 6.0 is released! I could not wait to download this distribution and test it. With the release of this version Debian has also decided to release a new website. The previous website was 13 years old so it was time for an update.
In my opinion the new website is beautiful.

Debian 6.0 uses a complete free kernel. If you want to use the non-free software you will need to add the non-free archive
Debian 6.0 functionality,

  • KDE 4.4
  • Gnome 2.30
  • Xfce 4.6

The boot manager of Debian 6.0 is the grub 2.0. Due the use of grub 2.0 it is possible to make your entire system EXT4.

The new Debian profiles itself as stable for servers but also usable for netbooks due the decrease of the boot time. They decreased boot time with starting some scripts simultaneously. There is a new file system which is called BTRFS we will do some research and write a full report about it.

So keep checking our site, we expect this report to be ready in a few weeks.

Official site: http://www.debian.org

Official wiki of btrfs: https://btrfs.wiki.kernel.org/index.php/Main_Page

Fosdem 2011

Posted in Latest news on February 7th, 2011 by yokke

Fosdem 2011

For all of you that know what Fosdem is and weren’t present, where were you?

So what is Fosdem?

Fosdem is a Free and Open source Software Developers, its a two-day event that is organized by volunteers to promote the widespread use of Free and Open Source software. The event took place in the beautiful city Brussels (Belgium (the country without a government))

Fosdem is the place to get in touch with all the different Open Source solutions

  • You can get in touch with developers
  • Get up to date about the changes in the world of Open Source
  • You can promote your Open Source Projects

As every year there were a lot of presentations. To many to talk about. A few presentations that I followed where

  • Introduction of ZFS and FreeBSD
  • SIP Communicator
  • FireFox 4
  • HTML 5 (this was a really nice presentation)
  • Why Should You Care About Debian (I was disappointed because they didn’t mention Debian 6 which was released on Saturday night)

The official site is: http://fosdem.org

If you have missed fosdem and like to see what you have missed go to http://video.fosdem.org/

The video’s of this year aren’t availeble yet but they will be soon! (At least I hope)

Fosdem 2011

For all of you that know what Fosdem is and weren’t present, where were you?

So what is Fosdem?

Fosdem is a Free and Open source Software Developers, its a two-day event that is organized by volunteers to promote the widespread use of Free and Open Source software. The event took place in the beautiful city Brussels (Belgium (the country without a government))

Fosdem is the place to get in touch with all the different Open Source solutions

  • You can get in touch with developers

  • Get up to date about the changes in the world of Open Source

  • You can promote your Open Source Projects

As every year there were a lot of presentations. To many to talk about. A few presentations that I followed where

  • Introduction of ZFS and FreeBSD

  • SIP Communicator

  • FireFox 4

  • HTML 5 (this was a really nice presentation)

  • Why Should You Care About Debian (I was disappointed because they didn’t mention Debian 6 which was released on Saturday night)

The official site is: http://fosdem.org

If you have missed fosdem and like to see what you have missed go to http://video.fosdem.org/

The video’s of this year aren’t availeble yet but they will be soon! (At least I hope)