- [Instructor] The Cisco iOS has built-in help
for all of the commands.
The help function can be accessed
by simply typing a question mark at the prompt.
This will display a list of commands
available at that command line mode.
Let me demonstrate this now.
I'm going to go ahead and click on the switch,
expand the window.
I'm going to hit Enter on the keyboard.
That brings me into the user mode.
If I hit Shift and question mark,
it displays all of the commands available
at the user exec mode.
You can see one of those commands is enable.
I'm going to go ahead and type enable now, ENABLE.
That takes us into the privileged exec mode.
If I hit Shift and question mark,
that brings up all of the commands
that are available in the privileged mode.
If I hit Enter,
that takes us down one line at a time.
I can also hit the space bar
to take us down a full screen at a time.
Another way that you can use the help feature
is to type a couple of letters and a command.
For example, if I scroll up,
you can see that I have three different commands
that start with CO,
but if I've forgotten,
I can simply type CO with a question mark
and that brings up all of the commands
that start with the first two letters, CO.
Configure, connect and copy.
So I can just go ahead and type configure,
space, and then if I do a question mark,
it brings up all of the remaining terms in that command line
that are available with the first term of configure.
In this case, terminal.
If I hit Enter after that, that's the complete command,
and that takes me into the global configuration mode.
From there I can type exit,
that takes me back to the privileged exec mode.
Another key that is very handy
when configuring the switch is the Tab key.
It is used to complete the command.
This means that when you type part of a command,
the Tab key can be hit or pressed,
and that will complete the full word.
This is very helpful,
especially if you are not very good at typing.
Also it minimizes command line errors.
Let me demonstrate this now.
I can type config, hit the Tab key,
and that brings up the full term configure.
Then I can hit a T, hit the Tab key,
and it brings up configure terminal.
I hit Enter, brings us into the global configuration mode.
I type exit, brings me back to the privileged mode.
So that's how the Tab key is used.
I'm going to use the Tab key a lot
as we go through the course here
on how to configure a Cisco switch.