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How to Install SNMP on Tomato Router Firmware and Graph Traffic with Cacti

You’ve flashed your old WRT54G or other vanilla router with the Tomato firmware. This itself turns your router into a lean, mean routing machine with QOS, SSH and more, but let’s say we want to take it a bit further. What it we want to get some more stats out of it? In order to […]


There have been a number of high profile account compromises due to the insecurity of password reset questions. Examples of two big ones off the top of my head are Sarah Palin Yahoo account compromise and the Twitter “Hacker Croll” fiasco. There have been many more compromises on accounts due to weaknesses in password reset questions, even […]



I recently received this error while mounting an iso image in a CentOS 5.3 install: [root@host ~]# mount -t iso9660 -o loop /mnt/glusterfs/ecp-spe-4867.iso /mnt/iso/ ioctl: LOOP_SET_FD: Invalid argument For more detail: [root@host ~]# mount -v -t iso9660 -o loop /mnt/glusterfs/ecp-spe-4867.iso /mnt/iso/ mount: going to use the loop device /dev/loop0 ioctl: LOOP_SET_FD: Invalid argument mount: failed […]


It is easy to do an in-place upgrade of Ubuntu Server from 8.10 ‘Intrepid Ibex‘ to 9.04 ‘Jaunty Jackalope‘. You can do this remotely over ssh or whatever you use to control your server. Best practices say to make sure to backup your server before doing the upgrade. I’ve done several servers this way with […]



Came across this little maddening issue again today after fixing it a few months back. I created a directory that is password protected using a .htaccess file. However, when trying to access this folder or anything under this directory, a File Not Found 404 error from WordPress is displayed before it even prompts you for […]


Zabbix is an excellent system monitoring package. It does everything from basic availability checking to detailed system resource analysis. It is capable of graphing the variables pulled from the system, and alerting admins if there is a problem or something needed for attention. Once you have the Zabbix server set up, you need to install […]


As previously written on this blog, I have set up a display in our lobby at work to display the day’s current events and meetings using Ubuntu and a tiny PC. Since this is a display which is on all day, the screensaver and monitor blanking (and other Energy Star features) are all turned off. […]



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