Alexander Leidinger

Just another weblog

May
12

Does every geek take a photo of Google in Zürich?

Maybe not all… my col­leagues wouldn’t have gone there if I wouldn’t have said something…

To be hon­est, I would have expected some­thing a lit­tle bit more shiny/geeky/… to take a pic­ture of (any­way, if you don’t see it: I have a real smile in my face on the pic­ture, so the geek in me enjoyed tak­ing the photo).

 

Alexander Leidinger in front of Google CH

Me in front of Google CH

 

Google CH

Google CH

 

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Mar
13

Happy Birth­day” from Google

In case you haven’t noticed yet:

In case you use a Browser which “is reg­is­tered with Google” (cookie, Chrome sync, Hang­outs plu­gin …) in a way that Google knows who you are when you enter the search page, and you have your birth­day entered in this account, then Google presents you a “Happy Birth­day” Google-Doodle on that day. If you are not on Google+ and you klick on the pic­ture, you get a page which offers you to upgrade to Goolge+.

Funny/scary? Up to you. For me it just visu­alises what I knew already (you can do a lot with per­sonal info, and Google get’s a lot of this) and I say “Thank you Google” (but I don’t upgrade to Google+).

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Aug
27

Why I don’t need Google

This is why I don’t need Google:

"I don't need Google, my wife knows everything!" T-Shirt

I don’t need Google, my wife knows every­thing!” T-Shirt

I found this T-Shirt in the old part of Rho­dos city, while descend­ing the Socrates road. I bought it off course. :-)

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May
26

New users in Solaris 10 branded zones on Solaris 11 not han­dled automatically

A col­league noticed that on a Solaris 11 sys­tem a Solaris 10 branded zone “gains” two new dae­mons which are run­ning with UID 16 and 17. Those users are not auto­mat­i­cally added to /etc/passwd, /etc/shadow (and /etc/group)… at least not when the zones are imported from an exist­ing Solaris 10 zone.

I added the two users (netadm, netcfg) and the group (netadm) to the Solaris 10 branded zones by hand (copy&paste of the lines in /etc/passwd, /etc/shadow, /etc/group + run pwconv) for our few Solaris 10 branded zones on Solaris 11.

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May
26

Increase of DNS requests after a crit­i­cal patch update of Solaris 10

Some weeks ago we installed crit­i­cal patch updates (CPU) on a Solaris 10 sys­tem (inter­nal sys­tem, a year of CPU to install, noth­ing in it affect­ing us or was con­sid­ered a secu­rity risk, we decided to apply this one regard­less to not fall behind too much). After­wards we noticed that two zones are doing a lot of DNS requests. We noticed this already before the zones went into pro­duc­tion and we con­fig­ured a pos­i­tive time to live in nscd.conf for “hosts”. Addi­tion­ally we noticed a lot of DNS requests for IPv6 addresses (AAAA lookups), while absolutely no IPv6 address is con­fig­ured in the zones (not even for local­host… and those are exclu­sive IP zones). Appar­ently with one of the patches in the CPU the behav­iour changed regard­ing the caching, I am not sure if we had the AAAA lookups before.

Today I got some time to debug this. After adding caching of “ipn­odes” in addi­tion to “hosts” (and I con­fig­ured a neg­a­tive time to live for both at the same time), the DNS requests came down to a sane amount.

For the AAAA lookups I have not found a solu­tion. By my read­ing of the doc­u­men­ta­tion I would assume there are not IPv6 DNS lookups if there is not IPv6 address configured.

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