Category: SysAdmin

uHOWTO: NTP in Windows 2003 – manual intervention required

Up to Windows 2000, using an NTP server as the time source was as simple as entering the server address in the Time/Date control panel. From 2003 onwards, you must follow the procedure detailed in KB816042 to configure the Windows

Posted in General, SysAdmin

MySQL fails after upgrade to 5.1 on Debian Squeeze

Are you running Debian Squeeze? Did you upgrade to mysql-server-5.1 ? Are you getting a message like this? Starting MySQL database server: mysqld . . . . . . . . . . . . . . failed! Did you

Posted in Debian, General, Linux, SysAdmin Tagged with: , ,

uHOWTO: Recover stuck modified keys from VMware Player or Workstation

If you use VMware Player or VMware workstation under Linux and you’re an alt-tab fan like me, you might end up with stuck modifier keys, so you can’t use keys like Ctrl, Alt or Shift outside of VMware. Xiao Feng

Posted in General, Linux, sh, SysAdmin, Tech Tagged with: , , ,

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

Posted in Debian, Linux, SysAdmin

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

Posted in Debian, General, Linux, Rant, SysAdmin, Tech

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

Posted in Debian, Gadgets, General, Linux, Nokia N95 8G, SysAdmin, Tech 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

Posted in Debian, General, Linux, Nokia N95 8G, SysAdmin, Tech Tagged with: , , , ,

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

Posted in General, SysAdmin Tagged with: , , , ,

Prodigy Infinitum, SMTP through port 25, botnets and such

After pulling my hair for a couple of days I just realized that my DSL provider is blocking all outgoing connections to port 25 with an ICMP Unreachable packet, which translates as a totally bogus “no route to host” message

Posted in Living, Mexico, Rant, Security, SysAdmin, Tech Tagged with: , , , ,

About typos in technical manuals

The product you are in charge of maintaining has been in active use for a decade. The manual is several megabytes long, and there’s an army of programmers, consultants and technical writers that make a living off it. As you

Posted in Rant, SysAdmin, Tech