[ Thanks to Amy
Kucharik for this link. ]
“Why are Trojan horses that take advantage of
misspellings so dangerous?“Sobell: Trojans that take advantage of misspellings are
dangerous because everyone makes a typo now and then. For example,
it is very easy to type sl instead of ls and, if the mistyped
command displays the correct output, you may not notice that it
installed a key logger or other mischievous program in the
background. Using TAB-completion when you give commands can help by
notifying you that there are multiple commands that start with the
same letters…”