linux posts

Yesterday, amidst the SlingMobile débâcle and an OS update, Kerio Technologies released Kerio Mail MailServer 6.7. The mail and collaboration server, often used as a replacement for Exchange, has added several new features, including a few geared toward Mac users.

The Kerio Global Address List (GAL) is a new feature that provides a simple way to get address and contact info from clients like Outlook or Entourage. It syncs and authenticates with both Microsoft Active Directory and Apple Open Directory, as well as Kerio's own user directory. In any company, people join and leave the group, and users are often required to manually update their address books to add and remove entries. With GAL, it's a single directory in a single place, and changes are transparent for users. It supports Entourage, works with the iPhone and functions offline.

Kerio MailServer 6.7 also comes with an auto-configuration script for Entourage 2008, downloadable within the Kerio client, providing pre-configured account setup. There's support for private events in iCal, allowing users to maintain personal schedules without requiring a separate calendar application. AddressBook gets some additional love with support for synchronizing groups (which become Categories in Entourage).

Kerio has had good support for iPhone users for a while now. For non-iPhone mobile users, there's new support for viewing HTML emails on Nokia devices, as well as DataViz RoadSync compatibility.

The MailServer itself is now a certified VMWare appliance, and promotes compatibility with two new Linux distributions: Ubuntu 8 and Debian 5. CentOS is the preferred platform for running on VMWare. IT admins and users alike will appreciate the dramatically improved anti-spam engine, which has been optimized for multi-CPU use, parallel processing of email messages for large queues, improved heuristics and 13 layers of spam protection.

In addition to some of the previously available migration tools provided by Kerio, a new IMAP migration tool relieves what is undoubtedly one of the biggest headaches in switching mail servers: keeping your old mail. It's a cross-platform utility which moves messages, folders, accounts and domains from the old system to Kerio MailServer. The IMAP migration tool has been fully tested with OS X.

Kerio's pricing has remained the same with this release. Starting at $499 for 10 users, there's a range of options available for different configurations and add-ons, as well as subscription pricing. See Kerio's pricing page for more details.

Call it the Touchable Penguin. OK, the touchscreen drivers aren't there yet, but the simple, scrolling shell output of a Linux kernel running on the iPhone represents a big achievement for the iPhone Dev Team and dev lead 'planetbeing.' The build is far from complete -- no wireless networking, no sound, no writeable support for the NAND flash memory -- but it's still very cool, and the effort involved was substantial (the team had to reverse-engineer the iPhone's boot loader so they could write their own).

Having a working Linux kernel on jailbroken iPhones and iPod touch handhelds might seem frivolous, but imagine the ability to run other touch phone OS platforms on top of an iPhone (like, perhaps, Android)... very tempting. You can see more of the rationale behind the Linux-on-iPhone project here, or you can skip to the second half of this post to see the video.

[via Engadget & Erica]

During the latest Linux conference in Melbourne, Australia, Linus Torvalds was quoted by the Sydney Morning Herald saying that the Leopard file system was "complete and utter crap." As you may know, Torvalds is the parent of the Linux kernel. He said that he still prefers Leopard to Windows Vista; However, he went on to say that both companies are using their operating systems to propel more software and hardware sales.

We'll refrain from commenting on various drawbacks of Linux distributions when compared to Mac OS X, but if you're curious about the challenges and pleasures found when moving to Linux, have a look at the Flipping the Linux Switch series produced by our colleagues at Download Squad.

[via MacNN]

Despite the publicity around Parallels' flagship Mac product, Parallels Desktop (which we've contributed to in some small part), there are some other interesting tools in the stable of Parallels' parent company, SWsoft -- which is now being rebranded as Parallels, Inc. just to keep us on our toes. One of those products is Parallels Virtuozzo Containers (PVC), which launches version 4.0 today in a webcast event at 11 am (Eastern). While PVC is not a Mac-compatible server (yet), the technology choices Parallels made in developing it may illuminate some future paths for the yet-unreleased Parallels Server product for Mac OS X.

Virtualization products like Parallels Desktop, VMware Fusion, and Microsoft's Virtual Server work via a hypervisor model, virtualizing the hardware platform so that each virtual machine runs in its own full-OS environment. This approach does a great job of insulating the VMs from the underlying physical hardware and provides for OS and build diversity (Windows, Linux and eventually Mac OS X Server running on the same virtualization platform) but it has some drawbacks: each virtual machine consumes a full helping of RAM, disk space and CPU resources while running, as though it was a physical machine. VMware in particular is respected for its expertise in optimizing these resource demands with its ESX enterprise-level server products, but the baseline requirements for system resources can't be fully alleviated.

PVC does OS virtualization, which tackles the problem of resource allocation for virtual machines in a different way. Virtuozzo VMs, or "containers," are created as overlays on the base OS that runs on the physical server, like a piece of transparent acetate over an animation backdrop. All the basic OS processes, files and libraries are present in the base server OS instance, and the container holds the differential changes that allow the VMs their individual characteristics and configurations. While you sacrifice one big feature of hypervisor systems, the ability to diversify OSes -- since the base OS is fixed as either Windows or Linux, all the containers have to be built on top of that OS -- what you gain is substantial, as each additional running VM takes only a small chunk of RAM and a comparatively tiny swath of hard drive space to work in. Virtuozzo servers can handle high VM loading on relatively modest hardware without taking major performance hits, which is a big plus if your server budget is constrained.

In the OS X virtualization session at Macworld Expo, the Parallels folks suggested that we may see both hypervisor and OS virtualization approaches integrated in the Parallels Server product, as the engineering teams from PVC and Server have the opportunity to put their heads together. Parallels has also said that the management tools for PVC and Parallels Server will be integrated as development moves forward. Even though PVC doesn't support the Mac directly, if you're interested in virtualization you might pop into the webcast and check it out.