Recently I generated kickstart files for a virtual environment where people could experiment and virtual machines could be rebuilt quickly. Sadly enough a typo slipped into the generated files that would make the anaconda installer stops. Every kickstart file could be corrected by the hand of course, but one sed command could also correct the typo in all files in one go.
$ sed -i 's/namesever/nameserver/' *.ks
The Unix toolkit is full of handy tools and options like this and it pays to get to know your environment. Especially when it is your work environment and you’re familiar with the Unix philosophy.