Author Archive

Ex Machina

Posted on Friday, April 10, 2015 at 5:11 pm


A new AI movie (warning, spoilers are in the link) Ex Machina is being released this weekend. Who’s going to see it?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


Toward Serious Debugging

Posted on Monday, March 23, 2015 at 6:06 pm


At some point you may want to know about why something is stuck, whether it’s your own code or someone else’s. Print statements, command lines and logging are fine when you need them but only if you are writing your own code. More is possible. The higher level strace and lower level gdb are good tools to use when something is stuck. While dtrace or SystemTap certainly amazing and powerful, reaching inside a live kernel, few people want or need that much power.

What are your experiences using these tools?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


grep

Posted on Saturday, March 7, 2015 at 4:50 pm


There are certain things sysadmins rely on a lot. If they break it’s really not good. For me, the grep tool is one of them, so I was surprised to find inconsistent results. Based on otherwise good advice I was trying to use grep -i '[p]rocess' to look for running processes. When it didn’t work correctly I discovered related bugs 28981 (includes a good test case) and 36567 so that for us in our environment grep fails when:

  • trying to match upper case data (lower case matched ok)
  • using dash i for case insensitive
  • using square brackets as above
  • LANG was set with UTF8

Evidently this has been a problem for a while. Though fixed upstream the fix hasn’t made it’s way to all production Linux environments, making the use of this common trick a bit risky in production.

What other problems have you encountered that you choose to code around?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


Design Principles as a UX tool: Part 1

Posted on Sunday, February 22, 2015 at 12:02 pm


I found a great article from voctorops on the principles of design. This is part 1 in a series. What do you think?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


Trusting Open Source – Security & Reliability

Posted on Sunday, February 15, 2015 at 11:56 am


Lots to say here. We know that many eyes make bugs shallow. Reliable, available, scalable systems can not get very far if they are not secure and results are not repeatable. President Obama visited Stanford this week. He was specifically focusing on student data privacy but the same issues apply to every web user. He was encouraging the private sector to work with government to find solutions. I hope the comments section facilitates a good discussion.

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


jquery newsticker

Posted on Saturday, January 10, 2015 at 11:11 pm


I recently implemented jquery newsticker for an intranet site. It is developed on github. It claims to be a "lightweight and easy to use news ticker" and I think they have done a good job. Has anyone else implemented a ticker?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


SDR for $15

Posted on Sunday, December 14, 2014 at 3:34 pm


At the meeting today several of us Amateur Radio people found an inexpensive 25MHz-1700MHz software defined radio receiver an extremely cool development. This wasn’t possible at this price in a consumer product until recently.

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


anyenv

Posted on Sunday, November 30, 2014 at 12:17 pm


Does anyone have experience using anyenv? How did it go?

TLDR version: In updating our meetings page for the new year I needed the Date::Calc perl module to run Michael’s great code. Turns out my perlbrew environment for perl was broken. I spoke to some folks in #perl on freenode.net and got some good advice. I was getting some strange errors but as I described on StackOverflow I solved the problem by re-installing 5.20.1 using perlbrew.pl.

However another related perlbrew tagged question with an upvoted answer pointed me to anyenv.

So, ruby users use rbenv to install ruby versions. Perlbrew is used for perl. anyenv is a wrapper that handles ruby, perl and other languages. As a lazy sysadmin this looks like a nice way to install these environments if it delivers on it’s promise. The dependency modules for each language must be written well and it needs to be secure. At least one reviewer liked it. Openhub’s review says it has low activity. Do you have any experiences with anyenv? How did it go?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


Lean IT

Posted on Sunday, November 9, 2014 at 1:30 pm


Information Technology (IT) has been getting leaner, doing more with less. Moore’s law marches on but CPU speeds and memory density aren’t often the primary impediments to getting something done. Lean IT is the application of some older ideas to IT using newer technologies. What have been your experiences with this?

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.


The Phoenix Project

Posted on Saturday, October 25, 2014 at 2:52 pm


In 2009 DevOps was born as described in a book, The Phoenix Project. I also tweeted about it. I’m just finishing the book and would like to discuss it with the group.

We meet at Bobby G’s Pizzeria on the second and fourth Sundays of each month from Noon to 3PM in Berkeley near the Downtown Berkeley BART station. Bobby G’s is on University Ave near Shattuck Ave. We hope you join us, join the discussion on our email list and/or join us in #berkeleylug on freenode.net by following the tabs at the top.








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