‘Super Wi-Fi’: Super, But Not Wi-Fi

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That’s in part because for now, at least, you can’t move a white-space device around. You can’t put a white-space radio into a phone or laptop because each white-space device must check its location against a database to determine which TV channels and wireless microphones are being used in the device’s area, so they can avoid those channels.

via ‘Super Wi-Fi’: Super, But Not Wi-Fi | News & Opinion | PCMag.com.

That may change a few years down the road, when “personal/portable” white space devices appear. Based on the 802.22 standard, these will be chips able to fit into laptops and tablets, with software that can “sense” clear frequencies as they move around.

Two LVM VolGroup’s, same name, one is system disk – what to do?

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It’s a lot easier to rename the “old” volume group if the old drive is the only one connected to the system.

Using your first FC4 installation CD and with only the old drive installed, boot into rescue mode (boot: linux rescue), but don’t search for or mount the FC installation. At the command prompt, you will probably need to active the lvm like this:

lvm vgscan

lvm lvscan

lvm vgchange -a y

lvm pvscan

lvm lvscan

The last two commands should list your volume group(s) and logical volume(s). Now use vgrename to fix the problem:

lvm vgrename VolGroup00 whatever_you_want_to_call_it

Note that all lvm commands need to be preceded with “lvm” in rescue mode.

via Two LVM VolGroup’s, same name, one is system disk – what to do?.

Red Hat / CentOS: Swap / Change Ethernet Aliases

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Red Hat / CentOS: Swap / Change Ethernet Aliases.

This didn’t work the first time I tried it and now it does.  For some reason eth0 and eth1 get switched on the 64bit CentOS 5.7 build which causes routing problems.  This can also be solved by fixing the static routes in /etc/rc.local.  It bothered me to have these interfaces have different names depending on what OS is running.  I think there’s also a way to force this in /etc/udev/ directory by adding a persistent-net rule file.  It all works now.

BTW: I also changed /etc/sysconfig/hwconf but don’t think that had any effect.

Linux Network Configuration

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This Linux tutorial covers TCP/IP networking, network administration and system configuration basics. Linux can support multiple network devices. The device names are numbered and begin at zero and count upwards. For example, a computer running two ethernet cards will have two devices labeled /dev/eth0 and /dev/eth1. Linux network configuration, management, monitoring and system tools are covered in this tutorial.

via Linux Network Configuration.

LivingSocial Now At 5,000 Employees, Half The Size Of Groupon

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A few days ago, at the DLD conference, Groupon CEO Andrew Mason revealed that his three-year-old daily deal company now has 10,000 employees, with about 70 percent overseas. What about LivingSocial, the No. 2 daily deal company? Tim O’Shaughnessy told me yesterday the company is now at 5,000 employees worldwide, with “just under half” in the U.S.

via LivingSocial Now At 5,000 Employees, Half The Size Of Groupon | TechCrunch.

Bringing A Startup Together: FounderDating Launches Matching Site, Expands To NY, Boston, LA

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Bringing A Startup Together: FounderDating Launches Matching Site, Expands To NY, Boston, LA | TechCrunch.

So far, FounderDating has been going well. ”The more we talk to people, the more demand we see” Alter says. “Incubators are sending applicants to it who need cofounders, saying things like ‘come back when you have one.’” A couple examples of successful matches include the team behind Y Combinator-backed referral platform Curebit, and inventory matchmaking site Sorced (whose cofounder, Elizabeth Knopf, has a longer post about the experience over on Women 2.0)