An other reason for having command line

Because you can easily follow along with tutorial / trouble shooting guidelines / other documentations. Check out the difference between these two tutorials:

• Improving TS Gateway availability using NLB
• Installing the webhoneypot on OpenWrt

In the first you have to orient yourself after some screenshots. If an error message comes up, it is much less likely that you will find it using a searchengine, because all similar instances will be encoded in pictures. Also, it is much harder to follow along.

Now check out the second case. You can copy-paste directly the commands from the blog. If errors come up, they will probably be present (and searchable) on the Internet, since they are inherently in a textual format.

Q.E.D.

Picture taken from marcman220's photostream with permission (and yes, I know that it is from a Windows CMD. Some command line is better than no command line)