Linux User Group of Mauritius Promoting open source software in our beautiful island

19Nov/140

Screencast in Mauritian Creole

Posted by Ish

A few days ago I received a comment on facebook asking if it would be possible for me to make Linux video tutorials. I recall in a previous LUGM meeting, we did agree that it will help to bring Linux into Mauritian homes if we make Linux tutos in Mauritian Creole.… Read more ➡

The post Screencast in Mauritian Creole appeared first on HACKLOG.

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10Aug/140

Screencast with FFmpeg

Posted by Ish

One of the best things with the Linux command line is that you happen to find a utility for almost everything you’d ever want to do with your computer. Last year I was looking for a screencast software supporting Linux. I found a couple few but upon trying I didn’t like them.… Read more ➡

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20Feb/140

Linux, video encoding

Posted by Ish Sookun

Finally all of LUGM Meetup videos are now on LUGM YouTube Channel. This was the first time “le me” trying video encoding. I had to do my little homework about encoders & all. I was initially baffled to see that each MOV file that Nadim gave me was above 1G in size. That would be too much to upload and I didn’t know if Youtube would accept MOV format. Then I remembered Harish mentioning about x264. A little bit of web mining and I had the required tools.

Oh! Due to some work adaptation, I am currently running Ubuntu 12.04 on my HP notebook. Getting the tools were straightforward using APT on Ubuntu. avconv was already installed, I just needed a couple of extras.

sudo apt-get install x264 libavcodec-extra-53  

Conversion would require something as follows:

avconv -i AMBA0075.MOV -c:v libx264 OpenSSH_1.mp4  

This command converted a 1.3G MOV file to approximately 200M MP4. Now, YouTube uploading becomes smoother.

A couple of tricks using avconv.

To know which formats avconv supports

avconv -formats  

To check available codecs

avconv -codecs  

To list video file properties

avconv -i video.mp4  

Converting FLAC to MP3

avconv -i music_file.flac -threads 8 -c:a libmp3lame -ab 320k -y music_file.mp3  

Here’s a list of videos from LUGM Meetup of 15th February 2014.

OpenSSH 6.5 Presentation Part I OpenSSH 6.5 Presentation Part II OpenSSH 6.5 Presentation Part III

Linux User Group of Mauritius, .mu Domain Presentation Part I
Linux User Group of Mauritius, .mu Domain Presentation Part II

Thanks to Ajay Ramjatan, Nadim Attari and Pawan Babooram for recording the presentations.

20Feb/140

Linux, video encoding

Posted by Ish

libav-logoFinally all of LUGM Meetup videos are now on LUGM Youtube Channel. This was the first time “le me” trying video encoding. I had to do my little homework about encoders & all. I was initially baffled to see that each MOV file that Nadim gave me was above 1G in size. That would be too much to upload and I didn’t know if Youtube would accept MOV format. Then I remembered Harish mentioning about x264. A little bit of web mining and I had the required tools.

Oh! Due to some work adaptation, I am currently running Ubuntu 12.04 on my HP notebook. Getting the tools were straightforward using APT on Ubuntu. avconv was already installed, I just needed a couple of extras.

sudo apt-get install x264 libavcodec-extra-53 

Conversion would require something as follows :

avconv -i AMBA0075.MOV -c:v libx264 OpenSSH_1.mp4

This command converted a 1.3G MOV file to approximately 200M MP4. {Smile} Now, Youtube uploading becomes smoother.

A couple of tricks using avconv.

1. To know which formats avconv supports

avconv -formats

2. To check available codecs

avconv -codecs

3. To list video file properties

avconv -i video.mp4

4. Converting FLAC to MP3

avconv -i music_file.flac -threads 8 -c:a libmp3lame -ab 320k -y music_file.mp3

Here’s a list of videos from LUGM Meetup of 15th February 2014

Linux User Group of Mauritius // OpenSSH 6.5 Presentation Part I
Linux User Group of Mauritius // OpenSSH 6.5 Presentation Part II
Linux User Group of Mauritius // OpenSSH 6.5 Presentation Part III

Linux User Group of Mauritius // .mu Domain Presentation Part I
Linux User Group of Mauritius // .mu Domain Presentation Part II

Thanks to Ajay Ramjatan, Nadim Attari and Pawan Babooram for recording the presentations.
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15Feb/140

LUGM Meetup // Presentations

Posted by Ish

We had one of the much awaited LUGM meetups today. This meetup comprised of two presentations :

1. New features brought in OpenSSH v6.5, by Loganaden Velvindron
2. What if .mu was in Mauritius?, by S. Moonesamy

It was held at Ebène Accelerator, Orange Tower, Ebène. I reached earlier, got time to have my lunch and a while later Logan came. We were having a general chit-chat when Pawan came. He passed his driving test today, that was great to hear :)

ebene-accelerator-board

On the facebook event page we had 30 RSVPs. However, I felt less people will make it today since there was a LAN Gaming event at University of Mauritius. Most probably UoM Computer Club folks wouldn’t make it. Anyway, 19 people showed up, that was great already.

Who made it today?

Neha Gunnoo, Darshini Seeburn, Nitin Mutkawoa, Pritvi Jheengut, Nadim Attari, Ajay Ramjatan, Selven, Chelon, Wasima Damree, Pawan Babooram, Avinash Mayaram, Ashley Babajee, S. Moonesamy, Thomas C, Shamsher Khudurun, Irfaan Coonjah, Fei Tan, Loganaden Velvindron and Ish Sookun.

13h30, we started with the first presentation. OpenSSH 6.5 features, by Logan. He briefed us about the project, OpenSSH and a little bit about OpenBSD. Logan gave us an insight on where OpenSSH is used and why it is favored over Telnet.

logan-openssh-presentation

SM (S. Moonesamy) added a couple of quickie information which prompted a question & answer session. Especially when both explained the role of IETF (Internet Engineering Task Force) in assigning numbers & standardizing Internet stuffs. Simply said, IETF folks strive to engineer the Internet as we know it.

logan-sm-presentation

Back to the presentation Logan continued explaining new security features. He talked about Edward Snowden’s revelations and weakened crypto algorithms into NIST (National Institute of Standards and Technology) standards. He talked about a new private key format, called Ed25519 and the ChaCha20 cipher. For those who were having trouble grasping this part, SM & Ajay gave a brief explanation about ciphers. Simply said, a cipher allows encryption of plain text data. However, Ajay highlighted that this does not guarantee data can’t be intercepted. It can be, but the obtained data is encrypted and pretty much unusable. Logan gave a small demo on generating keys using Ed25519 and how to connect using chacha20-poly1305 cipher. Among other new features is sandboxing support around pre-authentication part of the code. This however uses the Capsicum API which right now is available only in FreeBSD. Logan informed us work is being done to port Capsicum to Linux, which would enable Linux users to benefit from OpenSSH sandbox features in the near future. In the endnote, Logan stressed a few words on donation to the OpenBSD project.

sm-presentation

SM started by showing us a map of .mu servers around the world. He then showed us a slide containing information about loading time of a .mu page that wasn’t hosted in Mauritius. He compared that with websites hosted locally. Yes, there was a huge difference. His presentation was very much interactive in a way that involved everyone in the conference room. When he tossed about the online news websites, it seemed like everyone had something to add. Yup, something fun to add. Many of my comments never showed up on the news websites, my emails went unanswered. I wasn’t surprised to hear that I’m not the only one though. SM’s aim was not just to bring a topic about page loading speed, but having the .mu infrastructure locally would also contribute in lowering the price of the .mu domain. He showed us a table comparing prices of different TLDs (Top Level Domain). Whoop! .mu shines above with Rs 2,000 / year. I shouted I initially got my .in domain for Rs 90. Ajay then tossed the topic on DNSSEC and they briefly explained the technicality behind.

The debate on .mu was interesting and it involved participation of the audience as a whole. SM highlighted the importance of having technicians, admins, engineers & decision makers in the Mauritius Internet Users mailing list that he created. He hasn’t made the list public yet as it’s still in a kind of brainstorming phase where people are expressing the difficulties, issues and discussing about possible solutions.

Meetup finished on a happy-ending-note, with people willing to join & discuss further about bringing .mu to Mauritius.

Oh! Wait … I forgot the fun part. In the previous meetups we expressed the need of recording presentations. Nadim, Ajay and Pawan made it happen this time by providing the necessary gadgets. Once the videos are processed they should go on LUGM Video Channel. Here are some photo highlights …

lugm-camcorders-1

lugm-camcorders-2

lugm-camcorders-3

lugm-camcorders-4

lugm-eldergod

lugm-ish

lugm-feb-15-geek-team

The LUGM Geek Team
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