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The State of ZFS On Linux
by Peter Reutemann 11 Sep '14

11 Sep '14

'Richard Yao, one of the most prolific contributors to the ZFSOnLinux project, has put up a post explaining why he thinks the filesystem is definitely production-ready. He says, "ZFS provides strong guarantees for the integrity of [data] from the moment that fsync() returns on a file, an operation on a synchronous file handle is returned or dirty writeback occurs (by default every 5 seconds). These guarantees are enabled by ZFS' disk format, which places all data into a Merkle tree that stores 256-bit checksums and is changed atomically via a two-stage transaction commit.. ... Sharing a common code base with other Open ZFS platforms has given ZFS on Linux the opportunity to rapidly implement features available on other Open ZFS platforms. At present, Illumos is the reference platform in the Open ZFS community and despite its ZFS driver having hundreds of features, ZoL is only behind on about 18 of them."' -- source: http://linux.slashdot.org/story/14/09/11/1421201 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Learning About Enea's Real Time Linux Embedded OS (Video)
by Peter Reutemann 10 Sep '14

10 Sep '14

'Jon Aldama is the Product Marketing Manager for Enea A.B., but he prides himself on being a developer first and a marketer second -- a point he stresses early in today's video. Enea is behind Operating System Embedded, whose Wikipedia page, some say, "appears to be written like an advertisement," which an unkind person could also say about the Enea A.B. Wikipedia page. In any case, Enea works with the Linux Foundation's Yocto Project workgroup, whose main webpage says, "It's not an embedded Linux distribution – it creates a custom one for you." This is all open source, which Jon says is a big corporate principle at Enea -- and he should know, since his previous job was as an Open Source Compliance Officer and Software Analyst at Ericsson.' -- source: http://linux.slashdot.org/story/14/09/10/1638243 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Running Your Business on Linux (No, You Don't Need Windows)
by Peter Reutemann 08 Sep '14

08 Sep '14

"Believe it or not, my dear Linux friends, a lot of IT pros still believe they need Windows servers. They have this goofy idea that Active Directory, SharePoint, Exchange, Windows Server, SQL Server, and all the other members of the lardy malware vector family are the only proper business backends. They have this funny notion that Microsoft servers are easier to run. I must refute this odd notion with reality: they are not. They are expensive, troublesome, less-capable, and pointy-clicky does not equal easier to use, nor does it negate having to possess actual skills and knowledge." -- source: http://www.linux.com/learn/tutorials/786721 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Fedora To Get a New Partition Manager
by Peter Reutemann 07 Sep '14

07 Sep '14

"Developer Vratislav Podzimek has announced the next-gen partition manager for Fedora, blivet-gui. It is eventually going to replace GParted, the most popular GUI based partition manager, found in all major distros. The new tool is named blivet-gui after the blivet python library (originally Anaconda's storage management and configuration tool). The need of a new partition manager stems from the fact that none of the existing GUI partitioning tools supports all modern storage technologies. Fedora's Anaconda base supports all, though, and is hence chosen as the back-end for this new tool. The application is only a few months old but is already looking nice and useful. Features like RAID and BTRFS support are being worked on. Vojtech Trefny is the other developer working with Vratislav on blivet-gui." -- source: http://hardware.slashdot.org/story/14/09/07/2218229 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Mozilla 1024-Bit Cert Deprecation Leaves 107, 000 Sites Untrusted
by Peter Reutemann 05 Sep '14

05 Sep '14

"Mozilla has deprecated 1024-bit RSA certificate authority certificates in Firefox 32 and Thunderbird. While there are pluses to the move such as a requirement for longer, stronger keys, at least 107,000 websites will no longer be trusted by Mozilla. Data from HD Moore's Project Sonar, which indexes more than 20 million websites, found 107,535 sites using a cert signed by what will soon be an untrusted CA certificate. Grouping those 107,000-plus sites by certificate expiration date, the results show that 76,185 certificates had expired as of Aug. 25; of the 65 million certificates in the total scan, 845,599 had expired but were still in use as of Aug. 25, Moore said." -- source: http://it.slashdot.org/story/14/09/05/2120246 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Why Munich Will Stick With Linux
by Peter Reutemann 05 Sep '14

05 Sep '14

"There are many solved problems in open source. Groupware is not one of them," Georg Greve, co-founder and CEO of Kolab System starts off his post highlighting recent features of the latest release of the Kolab groupware project. He calls out a few newly elected politicians that don't like the current set-up, but says that thousands of users don't have the same experience. "Until today, the city of Munich is using the same stand-alone calendaring and email systems it had used when it was still fully operating on Windows. Updating these systems had a lower priority than the migration to LiMux then. But an upgrade is underway now. And, the solution they chose is agnostic to the desktop platform and will service LiMux and Windows alike. The primary difference made by another migration would likely be due to the perils that come with any migration, such as additional costs and delays. In other words: The very problem used to criticize the LiMux desktop is already being solved." -- source: http://linux.slashdot.org/story/14/09/05/1711243 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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How to limit CPU usage with CPULimit on Ubuntu Linux
by Peter Reutemann 03 Sep '14

03 Sep '14

"This document describes how to limit CPU usage in Ubuntu 14.04. I will use CPU-limit utilty for this purpose. Cpulimit is a tool which limits the CPU usage of a process (expressed in percentage, not in CPU time). It is useful to control batch jobs, when you don't want them to eat too many CPU cycles. The goal of cpulimit is to prevent a process from running for more than a specified time ratio. It does not change the nice value or other scheduling priority settings, but the real CPU usage." -- source: http://www.howtoforge.com/how-to-limit-cpu-usage-with-cpulimit-on-ubuntu-li… Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Akamai Warns: Linux Systems Infiltrated and Controlled In a DDoS Botnet
by Peter Reutemann 03 Sep '14

03 Sep '14

"Akamai Technologies is alerting enterprises to a high-risk threat of IptabLes and IptabLex infections on Linux systems. Malicious actors may use infected Linux systems to launch DDoS attacks against the entertainment industry and other verticals. The mass infestation of IptabLes and IptabLex seems to have been driven by a large number of Linux-based web servers being compromised, mainly by exploits of Apache Struts, Tomcat and Elasticsearch vulnerabilities. Attackers have used the Linux vulnerabilities on unmaintained servers to gain access, escalate privileges to allow remote control of the machine, and then drop malicious code into the system and run it. As a result, a system could then be controlled remotely as part of a DDoS botnet." -- source: http://it.slashdot.org/story/14/09/03/164225 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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You Got Your Windows In My Linux
by Peter Reutemann 02 Sep '14

02 Sep '14

'Ultimately, the schism over systemd could lead to a separation of desktop and server distros, or Linux server admins moving to FreeBSD, writes Deep End's Paul Venezia. "Although there are those who think the systemd debate has been decided in favor of systemd, the exceedingly loud protests on message boards, forums, and the posts I wrote over the past two weeks would indicate otherwise. I've seen many declarations of victory for systemd, now that Red Hat has forced it into the enterprise with the release of RHEL 7. I don't think it's that easy. ... Go ahead, kids, spackle over all of that unsightly runlevel stuff. Paint over init and cron, pam and login. Put all of that into PID1 along with dbus. Make it all pretty and whisper sweet nothings about how it's all taken care of and you won't have to read a manual or learn any silly command-line stuff. Tune your distribution for desktop workloads. Go reinvent Windows."' -- source: http://linux.slashdot.org/story/14/09/02/2037251 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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Tox, a Skype Replacement Built On 'Privacy First'
by Peter Reutemann 02 Sep '14

02 Sep '14

'Rumors of back door access to Skype have plagued the communication software for the better part of a decade. Even if it's not true, Skype is owned by Microsoft, which is beholden to data requests from law enforcement. Because of these issues, a group of developers started work on Tox, which aims to rebuild the functionality of Skype with an emphasis on privacy. "The main thing the Tox team is trying to do, besides provide encryption, is create a tool that requires no central servers whatsoever—not even ones that you would host yourself. It relies on the same technology that BitTorrent uses to provide direct connections between users, so there's no central hub to snoop on or take down."' -- source: http://tech.slashdot.org/story/14/09/01/2210246 Cheers, Peter -- Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ http://www.cms.waikato.ac.nz/~fracpete/ Ph. +64 (7) 858-5174

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