Author: javier

uHOWTO: Speed up RAID resync

So you’re tired of watching the grass grow while your Linux RAID2 array rebuilds itself. Let’s take care of it: $ echo 10000 > /proc/sys/dev/raid/speed_limit_min This should give you a 10x speedup over the 1000kB/sec default — subject to the

A brief note about Spamhaus Policy Block List

After getting in closer-than-usual acquaintance with my mail server logs I thought I’d share a brief note I found in the Spamhaus PBL FAQ: The first thing to know is: THE PBL IS NOT A BLACKLIST. Oh, and since you’re

DiskAid: access the files in your iPhone or iPod Touch

A few weeks ago I upgraded my wife’s iPod Touch to 2.1, and I just can’t believe that iTunes won’t let you backup your content even if it means a paid firmware upgrade. I would have used PodsBlitz to back

uHOWTO: Use your N95 8G as a bluetooth modem under Linux with Telcel

For completeness, here’s a followup to my post about using a Nokia N95 as a bluetooth modem under Linux. This is a working wvdial configuration for use with Telcel in Mexico. Remember to enter your SIM’s PIN in pin-telcel, and

Tagged with: , , , , , ,

HOWTO: Use your Nokia N95 Cellphone as a Bluetooth modem for Linux

Did you know that you can use your data-enabled N95 to get a thethered Internet connection from Linux? The access mode and speed will depend on your actual coberture, and as usual YMMV, but I’ve been using this setup for

Tagged with: , , , ,

Assign a consecutive number to each row in a mySQL table

Say that you need to add a unique index to an existing catalog table, so you decide to add a new column with a consecutive number in it. You may make it an auto_increment column, but that would work only

Solved mysterious Firefox 3.0.1 crashes

A few months ago I installed a Firefox 3 beta in my Linux laptop to… well you know, just to fool around. And it crashed spectacularly. I tried again with RC1. No such luck. When 3.0 came around I installed

X forwarding through SSH in HP-UX

If you try to do X forwarding by SSHing to an HP-UX host, you may get the dreaded “Can’t get IP address for X11 DISPLAY.” error. This is more common than you might think, and the reason is that an

Tagged with: , , , ,

update…where id in (select…) and mySQL ERROR 1093

What’s wrong with this picture? mysql> update ignore flight set intl=1 where id in (select as id from flight f left join airport a on where’mx’ for update); ERROR 1093 (HY000): You can’t specify target table ‘flight’

Farewell to Arthur C. Clarke

I just found out -thorugh an email from Thinkgeek, of all ways- that Arthur C. Clarke has passed away. 2001 was a mesmerizing experience for me when I first saw it. I think I was about 8 years old then.