Linux Bandwidth Monitoring Tools

Bandwidth in computer networking refers to the data rate supported by a network connection or interface. One most commonly expresses bandwidth in terms of bits per second (bps).This is huge list of Monitoring Tools For Linux Users.

Iperf is a tool to measure maximum TCP bandwidth, allowing the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

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Undelete tool for ext2, ext3 – giis

The tool is in beta, but in an emergency you might be willing to overlook that…

giis (gET iT i sAY) is a file recovery tool for Ext2/Ext3 filesystems. Once installed, current files and newly created files from /root and /home are recovered. It allows users to recover all deleted files, recover files owned by a specific user, dump data from old file locations, and recover files of a specific type, such as text or MP3. A forensic analyzer is also provided to assist users during recovery.

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Alternatives to Microsoft Exchange

1) Zimbra (commercial and free versions available)

  • Desktop client compatibility. Sync mail, contacts, and calendar to Microsoft Outlook and/or to Apple (Mail, Address Book, iCal).
  • Professional administration. Real time mailbox backup and restore, high availability clustering, storage cost management.
  • Zimbra Mobile. Over-the-air synchronization of mail, contacts, and calendar data with mobile devices.
  • Advanced web productivity. Ability to search for content inside attachments and view attachments as HTML instead of downloading.
  • Domain management. Ability to re-brand the web client and administer multiple customer domains.

2) Open Xchange (commercial and free versions available)

  • Linux Compatibility. Support 30 different linux distributions.
  • All Information in One folder. Using one folder, users can store all information needed for a particular project, including all contacts, meetings, and background information.
  • Document Management. Automatic versioning, locking of documents during editing, saving from MS Office applications, and access from MS explorer.

3) Scalix (commercial and free versions available)

  • Outlook Support. Offers automatic offline mailbox caching and improved PDA syncing.
  • Plug-in support. Provides certified plug-ins support for Google Desktop and MSN Search, McAfee VirusScan, Symantec Norton Utilities and Captaris RightFax Outlook Extension.
  • Search and Indexing Services. Real-time indexing of private and public folder messages. This results in sub-second mailbox-wide search and retrievals, even in very large mailboxes and folders.

4) Citadel

  • Ajax Support. An intuitive, easy-to-use AJAX interface.
  • Domain Management. Multiple domain support.
  • Easy Installation. installs in minutes without the need to manually integrate all the different components together.

5) opengroupware

  • Contact Management. Saves and organizes thousands of personal and company contacts, telephone, fax, addresses, e-mail contact addresses just to mention a few. Easily configurable with extensive and speedy search capabilities, categorization and remotely accessible.
  • Group Calendar. Manage meetings and events for an entire group or individual set of accounts. Attach notes to appointments. Link appointments to contacts and projects. Automatic detection of conflicts.
  • Resource Planner. Keep track of your company’s resources such as automobiles, projectors or conference rooms. Searchable timeslots to check for availability of specific resources or resources assigned to a specific group. Automatically check for resource conflicts upon appointment creation.

Ubuntu : Restore GRUB after Windows installation

Super Grub Disk

If you have booted your linux distro with Super Grub Disk, or a live CD and want to restore your grub, follow the below instructions:

  • As root (or with sudo), type grub
  • When at the grub prompt, type find /boot/grub/stage2
  • This will return something like (hd0,2)
  • To setup the boot partition boot type root (hd0,2). This is the harddrive and the partition your linux is installed on…
  • And then to configure grub type setup (hd0)
  • Now you’re done, so exit with quit

Interesting quote from Eric Raymond on Vista

“Vista won’t set the world on fire,” says open-source supporter Eric Raymond. “It will limp through 2007 looking lamer and lamer as it becomes evident that it’s not more than a glorified service pack, and one that completely fails to solve Microsoft’s security and reliability problems.”

Lets wait and see if he is right on that one…

Debian GNU/Linux 4.0 released

After waiting for so long (close to 2 years), Debian GNU/Linux 4.0 code named Debian Etch has been taken out of development cycle and is given the stable tag.

Some of the new features in Debian 4.0 are as follows :

  • A fully integrated installation process with out of the box support for encrypted partitions.
  • Graphical installer for those with enough memory for their PC
  • Use of secure apt to enhance security while installing software.
  • Debian GNU/Linux 4.0 now runs on even AMD64 and Intel EM64T (amd64) apart from 9 other architectures.
  • Now can be installed from various installation media such as DVDs, CDs, USB sticks and floppies, or from the network.
  • Support for multi-architecture installation disks.

Those who are using an earlier version of Debian need just do an

# apt-get update

and an

# apt-get dist-upgrade

… to move their Debian distribution to the latest version.

Another important news especially for people administering Debian servers is that the Debian team has also updated the official Debian 3.1 version to include some much needed security fixes. The official Debian website has the full press release regarding Debian 4.0.

Linux Partitioning with GParted

Of course, if you make a mistake, you can still destroy your data..

GParted is a free utility that allows you to partition your hard drive without destroying your data. It is a Linux program, but can be used to partition filesystems for Windows (FAT16, FAT32, NTFS) and Mac OS X (HFS, HFS+) as well.

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