Those who come from the Unix world are (or at least, should be)
accustomed to opening up plain text configuration files and working
with them. Those who come from the Windows world probably aren't.
Even though many people who administer Windows systems started off
with MS-DOS, it's most likely only a distant memory for them.
Windows system administrators should be aware that Linux system
administration means getting back to doing things in text mode with
text editors. Does that mean that there is no way to do it in
graphic mode? Absolutely not. As we mentioned before, there exist
GUI tools for this. But anybody who's used a Linux system for some
time knows that, on one hand, command line tools can be very
efficient and extremely fast if you're proficient with them. On the
other hand, there may be cases where you can't run graphic tools on
a particular system. And let's face it, the fact that you can deal
with plain text configuration implies that you have a greater
understanding of what's going on. This will come in handy at some
point when you've got a large problem that needs to be solved.
If you followed our intermediate level course, you will have learned about
the most popular text editors in Linux. Therefore, we'll just limit
ourselves here to say that you need to pick one that you feel
comfortable with. Basically, in the Linux world, it boils down to
using one of the two most popular text editors. These are Emacs and vi. For more
information on these, please consult the lessons in our
intermediate course at the link above.