"Dear Lina: I'm a field sales representative and I take my
laptop everywhere. I use it to login to all the other systems I
use, but I have difficulty remembering all my passwords. The fewer
I have to recall, the better. Is there an easy way I can manage all
of my login accounts?"
"This is not a problem at all. My very favorite means of safely
reaching all of my login accounts is ssh. In case you haven't heard
of it, ssh is a remote login program which provides encrypted
connections. With ssh you can create a private key with a
passphrase that you select. Choosing a unique passphrase is
important and deserves a moment of your time to devise. It will be
a real lifesaver if that laptop ends up in someone else's hands.
Here are some hints for selecting a good passphrase..."
"Dear Lina: I have a Linux system that doesn't appear to be
working correctly. My network connection is intermittent. Sometimes
my connectivity will be fine for hours at a time, and sometimes it
will drop its connection every few minutes. On occasion I get over
80% packet loss when I ping our corporate intranet server. What can
I do to investigate this problem and hopefully prevent it from
"Given the symptoms you describe, my first suspicion is that
you're the victim of a stolen IP address. It's easy as pie to check
if your IP has been stolen. Turn off the afflicted machine, and use
a different machine that hasn't been flaky, to ping for it. Are you
still getting a ping reply? If so, there's the culprit."
"The next step in tracking down this IP thief is to actually
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