Thursday, September 30, 2010

udev: renamed network interface eth0 to eth1

I ran into this problem today after cloning a Fedora13 VM (running KVM):
Device eth0 does not seem to be present, delaying initialization
dmesg revealed that it had renamed eth0 to eth1:
udev: renamed network interface eth0 to eth1
I want eth0, not eth1. Virt-cloning changes the mac address so that probably confused udev. If this happens, then you can remove the a bad rule that it made for itself and ask it to try again. In other words:
rm /etc/udev/rules.d/70-persistent-net.rules
udevadm trigger

tahoe-lafs

Tahoe-LAFS offers a GPL'd file system which supports decentralized storage system with provider-independent security.

Monday, September 27, 2010

pymazon

You can download your non-DRM'd music with a GPL3'd client pymanzon.

facebook postmortem

The facebook postmortem is technically interesting.

OpenLDAP memberOf Overlay

We use LDAP groups with the memberOf attribute in OpenLDAP. We're looking into the memberOf Overlay so that we can have atomicity during updates to this attribute.

Monday, September 20, 2010

Simple idea for multifactor authentication

Google Apps will soon offer a user-friendly way to implement multifactor auth with a cell phone. I'm looking forward to when it's an FOSS module that we can plug into our web-based services so that we can have extra security.

Thursday, September 16, 2010

SET: Social Engineering Toolkit

The SET: Social Engineering Toolkit shows how easy it is to socially engineer people. Not that I intend to do this, I just find it concerning as a sysadmin.
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gpg2, gpg-agent, enigmail

A 'yum upgrade' on Fedora 13 brought in gpg2 instead of the original gpg. It is "more suited for server and embedded platforms... and more targeted to the desktop", as per the man page. Fedora is now also providing Thunderbird 3.1.3 which works nicely with enigmail 1.2.2, provided that you invoke gpg-agent.

Tuesday, September 14, 2010

Sunday, September 5, 2010

The Elements of Style: 0

This is not directly related to Unix, but makes me think of good code.

"The approach to style is by way of plainness, simplicity, orderliness, and sincerity."

"Rich, ornate prose, is hard to digest, generally unwholesome, and sometimes nauseating."

The Elements of Style, Strunk and White.

gns3

"GNS3 is a graphical network simulator that allows simulation of complex networks. It can also be used to experiment features of Cisco IOS, Juniper JunOS or to check configurations that need to be deployed later on real routers."

Installing it looks very easy as per the installation video. It also has a tutorial.

Friday, September 3, 2010