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Upgrading Debian from 32-bit to 64-bit - AKA "crossgrading from i386 to amd64"

I went crazy again and upgraded my laptop from 32 to 64 bits. This was a rather complex problem, and in retrospect it may have been easier to simply reinstall. But it was a good exercise and a good test of the new multi-arch support, which, I gotta say, works surprisingly well.

A few other people wrote their own procedures already, but I made my own in my wiki (which, incidentally, I am thinking of using to replace this blog which I can't seem to upgrade to even Drupal 7...).

Vus : 934
Publié par anarcat : 13

Password reset of Speedstream 5200 modems

After an extended downtime on my ADSL uplink at home during a nice snowstorm, I got curious and wanted to find out the SNR (Signal to Noise Ratio) I had on my line, to try to explain why it was down. It turned out it was more complicated than I thought, because the modem was locked down by Bell Canada (even though I am not a customer). There was a Windows utility, but since I haven't been running this pathetic operating system in years, I had to find an alternative. Fortunately, the author of that utility posted a description of the packet format used for the password reset, and here I was trying to send raw ethernet frames using Linux (for testing and, why not!) and FreeBSD (because I use FreeBSD for routing, because I dislike iptables). The result is this somewhat poorly written C program, available in this  [...]
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Vus : 1043
Publié par anarcat : 13

Announcing a prettier noping

I have implemented really pretty histograms in the venerable ping software, something I never thought could be improved, until I discovered prettyping.sh, something that was just begging for improvements. Which are now done. But first some history... First, in 1983 (!), there was ping and network operators rejoiced, as they could see if a host was down or not, and have all sorts of geeky statistics: PING koumbit.net (209.44.112.66): 48 data bytes 56 bytes from 209.44.112.66: icmp_seq=0 ttl=52 time=25.076 ms 56 bytes from 209.44.112.66: icmp_seq=1 ttl=52 time=24.006 ms 56 bytes from 209.44.112.66: icmp_seq=2 ttl=52 time=24.106 ms ^C--- koumbit.net ping statistics --- 3 packets transmitted, 3 packets received, 0% packet loss round-trip min/avg/max/stddev = 24.006/24.396/25.076/0.483 ms Then, in 2006, there was noping, and things were, well, not [...]
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Vus : 1426
Publié par anarcat : 13