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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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Raspberry Pi Gets a Brand New Browser
by Peter Reutemann 02 Sep '14

02 Sep '14

'The Raspberry Pi team has announced a new browser for Raspberry Pi. They had worked with Collabora to create an HTML5-capable, modern browser for Pi users. While announcing the new browser, Eben Upton said, "Eight months and a lot of hard work later, we're finally ready. Epiphany on Pi is now a plausible alternative to a desktop browser for all but the most JavaScript-heavy sites."' -- source: http://build.slashdot.org/story/14/09/01/1918211 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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Docker news
by Peter Reutemann 01 Sep '14

01 Sep '14

Containers vs Hypervisors: The Battle Has Just Begun -- source: http://www.linux.com/news/enterprise/cloud-computing/785769 SUSE's Flavio Castelli on Docker's Rise Among Linux Distros -- source: http://www.linux.com/news/enterprise/cloud-computing/785551 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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Raspberry Pi-Compatible Development Board Cancelled
by Peter Reutemann 01 Sep '14

01 Sep '14

"Anyone who might have been interested in the miniature Raspberry Pi compatible board mentioned here a month ago should know the board has been cancelled due to problems sourcing the Broadcom SoC. Given the less than welcoming response from the rpi community to the board's release, there is speculation as to why Hardkernel is having trouble buying the chip." -- source: http://build.slashdot.org/story/14/08/31/147211 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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Linux 3.17-rc2 Release Marks 23 Years of the Linux Kernel
by Peter Reutemann 26 Aug '14

26 Aug '14

"Linus Torvalds released Linux 3.17-rc2 today in commemoration of the 23rd anniversary of the original kernel announcement. It was on 25 August 1991 that he announced his new OS project to the Minix users list." -- source: http://linux.slashdot.org/story/14/08/25/2325239 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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Choose Your Side On the Linux Divide
by Peter Reutemann 25 Aug '14

25 Aug '14

'The battle over systemd exposes a fundamental gap between the old Unix guard and a new guard of Linux developers and admins, writes Deep End's Paul Venezia. "Last week I posted about the schism brewing over systemd and the curiously fast adoption of this massive change to many Linux distributions. If there's one thing that systemd does extremely well, it is to spark heated discussions that devolve into wild, teeth-gnashing rants from both sides. Clearly, systemd is a polarizing subject. If nothing else, that very fact should give one pause. Fundamental changes in the structure of most Linux distributions should not be met with such fervent opposition. It indicates that no matter how reasonable a change may seem, if enough established and learned folks disagree with the change, then perhaps it bears further inspection before going to production. Clearly, that hasn't happened with systemd."' -- source: http://linux.slashdot.org/story/14/08/25/1730245 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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Munich Council Say Talk of LiMux Demise Is Greatly Exaggerated
by Peter Reutemann 25 Aug '14

25 Aug '14

"The rumors of Munich's city government going back to Microsoft seem to have been greatly exaggerated. There was a review of the city's IT systems that was called for by the mayor, but it wasn't solely just to decide on whether to move back to Microsoft. And while there have been complaints about LiMux, they mostly seem to concern compatibility with OpenOffice.org, which may well be resolved by switching to LibreOffice." -- source: http://linux.slashdot.org/story/14/08/24/194208 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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