Juliet Kemp

tcpdump is a packet sniffer — it captures the network packets (traffic) that pass through a machine, enabling you to examine and analyze the traffic

The SysReq key is hidden up the top right of your keyboard, and looks a bit like a relic from a former era of computing. (Which, indeed, it is.) But

UUID (Universal Unique Identifier) notation is another way provided by Linux to access your disks. Unlike the standard /dev/hda1, /dev/sda2 notation, it

It's quite common to find yourself replacing machines that are still functional but just below the specs you now need — in which case it's preferable to

More on open source software Using PuTTY (the best Windows SSH client going) and Xming (a free X Window server for Windows) enables you to log in from a

LDAP (Lightweight Directory Access Protocol) is basically a way of organizing information and providing access to it. It's commonly used for user, service

If you have multiple Debian machines to administer, approx can help you get them updated and upgraded more quickly and using less bandwidth. approx is an

Sometimes you may want to know which process is accessing a particular file or filesystem — for example, if you get a "device is busy" error

The amazing versatility of the Linux command-line is a happy and joyous thing, but it also means that however experienced you are, there's always

Aliases are great for saving typing time, and you probably already have a handful set up. But you may not be aware that it's possible to set up aliases

As you're doubtless aware, Debian Lenny was released last week, which is good and exciting news! There's a stack of improvements and software updates, as

Hitting tab to complete commands and filenames is great. Extending this to hostnames is even better. (Does it show that I'm very lazy?) One way of doing