function f-tutorial.0 ()
{
clear
cyan ; bold
printf "\n\n"
echo "Tutorial - A Command Line Introduction"
printf "\n\n"
white
echo "Hit < m > to return to the tutorial menu at any pause - "
echo "Hit < x > to get a command prompt."
echo
echo "In this tutorial, you can move on at your own pace"
echo "simply by hitting any other key, unless otherwise prompted."
yellow
echo
echo "If in doubt, I suggest the space bar... most apps use it to page down."
echo
echo "We'll start now to get you in the habit..."
echo "Hit the <space> bar to continue"
f-tutescape
white
echo " "
echo "Command tutorials usually start with simple commands."
echo " "
echo "This one starts with an explanation of directories, because"
echo "without understanding how that works, you will be lost - you"
echo "need to know where you are in the system before you can usefully"
echo "do things. You then learn how to move around in that system."
echo " "
printf "\n\n"
echo "Directories ( also known as \"folders\" ), are shown by a path"
echo "written in the form"
echo " "
echo "/path/to/the/destination/directory"
echo " "
f-tutescape

echo
echo "Everything starts from \"/\""
echo " "
echo "That needs explaining... "
echo " "
echo "From \"/\" the contents of the whole inx system is something like.."
printf "\n\n"
ls -a --color=auto /
white ; bold 
printf "\n\n"
echo "this of course tells you nothing if you don't know what you are looking at :-) "
echo "Mostly those are directories - subdirectories of / "
echo 
echo 
echo "Normally when you log in, you land in your \"home\" directory."
echo
echo "The path from \"/\" to where you currently are looks like:"
echo
pwd
echo
echo "So for example /home is directly below \"/\" , and "
echo "$HOME is \"inside\" or \"below\" /home "
echo
echo 
echo "You can think of this as a root system branching out beneath a tree"
echo "... or as a series of boxes within boxes, with \"/\" as the outermost box."
echo 
echo "Hit <space> to see a simple example using the /usr directory"
echo " ( Give it a moment to start up - q to quit from the graphic)"
f-tutescape
fbi /usr/share/graphics/directory-boxes.png
clear
echo 
echo "Before moving on to other commands, you find out how to see"
echo "what is in the places defined by the directory structure."
echo " "
echo "In this tutorial, each exercise gives you a command prompt and a new \"shell\"."
echo "The command prompt looks something like this ..."
echo " "
echo "$USER@$HOSTNAME:$PWD $"
echo
echo
echo " ... your home directory has the symbol \" ~ \" (tilde) as a shorthand, so when "
echo "in that directory you will not see the full path as shown above."
echo
echo "Each time you are asked to do an exercise, you exit the shell to come back to this"
echo "tutorial. To do that, you can type "
echo
yellow
echo "exit"
white
echo
echo "... followed by the <enter> key"
echo
echo "Commands will be shown here in yellow, as above."
printf "\n\n"
f-tutescape

echo "The command program you will be using is called \"bash\" -"
echo "which stands for \"Bourne Again SHell\" because it is based on the earlier"
echo "\"Bourne\" shell... you'll see a lot of these kinds of \"jokes\"... don't blame me!"
echo
echo "Here is a shell (/bin/bash)- try typing"
yellow
echo
echo "pwd"
echo
white 
echo "The \"pwd\" command means \"print working directory\""
echo " ... then type "
echo
yellow
echo "exit"
white ; unbold
echo
/bin/bash
bold 
clear
echo
echo "Welcome back..."
echo
echo "Let's have a closer look at the directory idea"
echo
echo "As an example, we could show /home/ like this..."
printf "\n\n"

yellow
cat << EOD

			/home
	       ___________|_________
	      |                     |
	/home/you             (/home/someone-else)
	  ___|____________________________________________________
         |         |             |          |         |           |		
   about-inx  example-content  intro-text  plait  screen-notes  video

EOD
	 			
white
f-tutescape
echo
echo "Suppose we want to see what is in the \"plait\" directory."
echo "To return from anywhere to $HOME, a shortcut is simply to type"
echo
yellow
echo "cd"
echo
white
echo "If we are in our home directory, we can type "
echo
yellow
echo "cd plait"
echo
white
echo "then"
echo
yellow
echo "ls"
echo
white
echo "to see the contents. Try that now, then exit again to return to the tutorial"
echo
unbold
/bin/bash
bold 
echo
echo "\"ls\" only gives you the short version - there are many options to ls."

f-tutescape


echo
echo "For example, to see all files in a directory, including \"dot\" files,"
echo
echo "(Dot files are \"hidden\" files by default, starting with a dot -" 
echo "full stop or period, if you prefer) "
echo
echo "you can type"
echo
yellow
echo
echo "ls -a"
echo
white
echo "Try that now, then exit as usual..."
echo
echo "Tip: a shortcut for \"exit\" is ctrl+d"
unbold
echo
/bin/bash
white
bold
echo
echo "As you saw, different files have colour codes."
echo "For example, links to other files are cyan, and directories are blue"
f-tutescape
echo
echo "Let's get a little more adventurous."
echo "This time, type "
yellow
echo
echo "cd /usr/local/bin"
echo
echo "ls"
echo
echo "exit ( or control+d , as suggested in the previous tip)"
echo
white
unbold
/bin/bash
echo
bold 
echo "What you saw in the /usr/local/bin directory was the collection"
echo "of scripts and shell functions used to run \"INX\" menus etc."
echo
echo "Of course, you don't actually need to change to a directory "
echo "to see it - for instance you could simply have typed"
yellow
echo
echo "ls /usr/local/bin"

f-tutescape

white 
echo
echo "Now, typing long paths like /usr/lib/foo/bar/flurble gets old fast."
echo
echo "Fortunately the programmers of the shell agreed, so we have a short cut."
echo
echo "To complete a path we can hit the tab key. Thus for example"
echo
yellow
echo "cd /us <tab> loc <tab> bi <tab> expands to"
white
echo
echo "cd /usr/local/bin"
echo
echo "Armed with this knowledge, try navigating to /var/cache/apt/archives,"
echo "then return to your home directory ( $HOME) by just typing \"cd\""
echo "as explained earlier."
echo
unbold
/bin/bash
bold
echo
echo "OK. Using tab like this is a habit to be encouraged, obviously ;-)"
echo
echo "Think of moving from one directory to another as if you were"
echo "actually moving from place to place. At any time, you are in "
echo "whatever directory is returned by the \"pwd\" command - or, more simply,"
echo "the path shown by the default prompt."

f-tutescape

echo
echo "The more observant user will have noticed something extra in the inx prompt..."
echo
echo "Because this is a \"console only\" system, it is nice to know which virtual"
echo "terminal you are currently using. ( tty1, tty2 and so on )."

f-tutescape


echo
echo "Now, because at any given moment you can only see the terminal"
echo "that you are looking at, you might not be aware that there are"
echo "six altogether - and you can easily move from one to another..."
echo
echo "I will now show you your six vt virtual terminals ( tty1-tty6 )"
echo 
echo
echo "This will only take a few seconds and it doesn't "
echo "hurt a bit...  Hit <space> to see ... "

read -s -n 1

for tty in $(seq 1 6) ; do chvt $tty && sleep 2 ; done ; chvt $(tty | cut -c 9)

clear
cyan
echo
echo "So - I have set up some menus and stuff on each tty for you."
echo "You can always customise to your taste, of course - each menu has an escape key..."
echo
echo
white
echo "Try navigating through the tty numbers - "
echo
yellow
echo "alt + arrow keys   or  alt + F1-6"
echo
white
echo 
echo
green
echo "It might be an idea to end up here on $(tty) when you have finished..."
white
f-tutescape

echo

printf "\n\n\n"
cat << EOC
So now you have an idea of how to navigate the file system structure, and
how to switch between "workspaces" by using virtual terminals.

That's already more than a lot of users know !

A few commands coming up, in tutorial 1 - choose it from the menu.
EOC
echo
echo
f-tutescape 

f-tutorial

}