Change lowercase to uppercase or vice versa using sed the brute force easy way and the smart way. One use of this would be finding the hardware address of an interface and converting it to all uppercase.

These two scripts are called when you start a qemu or kvm virtual machine. I removed the openvpn –mktun and –rmtun commands because qemu handles it for you.

For Linux it’s a simple shell script, nothing fancy is needed. If the script ends with a 0 exit value, the commit will work, if it exits non-zero, the commit will fail. In Windows the syntax is different because you don’t have a real shell. Instead, you use batch file commands to accomplish the same thing. The logic is pretty much the same because it’s simple.

You have a bunch of related applications, each has their own Makefile that knows only about their own application, but you have dependencies where one app needs to be built before another. Here’s a skeleton bash script for building any one thing or everything.

#!/bin/bash

function build {
echo "*** …

Reliable, effective, and simple. If you don’t mind a blip in ldap service for a minute or two in the wee hours of the night, it works like a charm.

Want to have some fun with users that keep ssh’ing to your box? Let them in, then kill them right away. I don’t even remember when/why I wrote this silly script, but here it is. There’s a lot better ways you could do this, and if you want any real ssh security, don’t even let them log in at all.

So I just wrote this in 2 minutes so I could kill some things in /etc and /home and be done with it. Short and simple, don’t you think?