Accessing the Linux command line is quite simple. I’ll describe the process as it is on a Ubuntu system but only because Ubuntu has the most market share of the Linux distros today. The concepts here carry over all most if not all other Linux distributions. One other thing I should point out is that the command line is sometimes referred to as the “console” or “terminal” and I may use those terms from time to time.
There are times that you’ll need to use the command line in order to get something done because there won’t be an appropriate GUI tool available or a GUI tool that is available doesn’t have a needed option. In these cases you can access the command line to get the job done.