virsh won’t let me query information, but I do know the vm names I wish to start and I have a simple ssh shell on the host machine. So lets give it a shot.

You don’t need calculators or other languages and compilers to do math. You can do a lot in bash (GNU Bourne-Again SHell), and it’s really easy!

Ever opened a file vim but didn’t notice it was read-only until you try to save? Don’t exit and run sudo in front of the same command again. Try this instead.

In almost all high level languages you can do something similar to x++ to increment an integer counter. Bash doesn’t have an incrementer, but you can still make your own integer counter using back-ticks and expr.

Here’s a short bash script to parallelize your jobs. There are utilities already written for just this type of thing, but forget xargs. Check out xjobs instead.

I like os’s subprocess.Popen() to run shell commands from within my Python code. I also like to define TRUE and FALSE to use as return values. Now I know what you’re thinking: there’s no such thing as ‘C’s #define in python because there’s no compiler to swap out of all your substitutions at compile time. However, it’s just as easy to achieve the same results.

This is so handy, I can’t believe i’ve never used or even heard of this until today! You can easily run your bash shell scripts in debug mode to watch what they’re doing behind the scenes in real time. You get to see the levels of nesting when you’re inside loops and variables get replaced with their actual contents at the time of execution.
This might come in handy if you have multiple levels of nesting in ‘for’ and ‘while’ loops or a few if/then/else statements and you want to see just what is getting passed in the comparisons.

I don’t know why I always forget how to do ranges, but I do. I guess it has something to do with the fact that I don’t expect it to be like C at all, and I don’t need to use it often enough to remember.

The vmrun command makes administering VMware virtual machines fast and easy when you’re stuck dealing with VMware Server 2.0. I really hate the web interface. It’s not responsive and in my opinion, a huge step backwards from the old 1.x consoles.

In Ubuntu, Fedora and other systems I’ve seen rsyslog running on, to see the console messages you have to have physical access to the server usually through a KVM or IP-KVM setup. Kernel messages are sent to /dev/console while mail, crit, debug, and others get sent to files. Any of these message can be monitored remotely…