Normally, everything you type on the keyboard is shown on the screen.
In other words, the screen echoes your typing.
However, in some situations, you may not want to see your typing appear.
For example, when you are typing a password, someone looking over your
shoulder may see it or observe it on the screen if you leave the
terminal.
It provides better security if the password does not appear on the
screen.
You can turn off the echo feature, so your typing does not
appear, by entering
You can turn on the echo feature, so you can see what you type, by entering
