command line Tag

On the same trip to India, I found myself in the position of delivering a training session to a room with incredibly varied backgrounds and skill levels. Some folks had never edited a file on the Unix command line before. Others just wanted...

I recently took a trip to Kolkata, India to train users and administrators of an Apple / Inquiry compute cluster there. The slides I developed for that trip may be of general interest, and so I'm sharing them here. The intent of these...

Apple provides a GUI for setting up the IP address and authentication information on the LOM. The problem, for me, with using a GUI for something like this is that it's nearly impossible to script and automate. When I'm setting up a cluster...

The problem addressed here is the same as the previous two, except that the remote administrator won't open up *any* ports in their firewall. Machines on the customer's network can connect out onto the internet, but there is no direct way to connect to...

In a previous post I described how and why one might set up a very simple ssh tunnel in order to access a web server or a remote desktop server on a machine with a restrictive firewall. This post goes one step deeper, showing...

A basic introduction to ssh tunnels: As a first puzzle, assume that a friendly administrator gave me an ssh account on her web server. However, her organization's security scheme only allows me to get to port 22. I can ssh in, but...

Here is a trick I use a couple of times a month to get finicky compute nodes in a Apple compute clusters to correctly bind to their LDAP / Open Directory master. This started working as of OS X 10.4, and to my knowledge...