[ Thanks to Kathy for this link.
]
“Because Linux is a deep operating system, we often use a
miniscule portion of a tool’s features. I, for one, use awk
primarily to isolate columns that cut can’t find, though in fact
awk is a full-fledged text-processing language. There’s nothing
wrong with that approach — actually it’s unavoidable — but it
benefits us to delve more deeply into the advantages a single
program can offer.”
“Presumably you have already installed SSH and are using it to
securely log in to remote systems…..However, most people simply
connect via SSH, enter their passwords, and type away. They don’t
realize that SSH has advanced key-management features that allow
them to avoid having to retype their passwords; that its
port-forwarding options can secure other, normally insecure,
packages; and that they can employ little tricks in SSH that would
make their lives easier.”
“There’s great confusion at present regarding SSH and the
different versions of the software available…..I recommend using
the newest version of OpenSSH, 2.5.1p2. At the very least, use
OpenSSH 2.3.0p1, as earlier versions had security holes. Several
details that I will discuss do not apply to older versions of
OpenSSH or to other implementations of the SSH protocol.”