jeltsch's blog

If you manually want to syncronize your computer's clock with a time server: sudo /usr/sbin/ntpdate tick.keso.fi

Macs don't have a BIOS. They have something called Open Firmware instead. So the BIOS password is called Open Firmware password. You boot into Open Firmware by pressing the command (=apple), option, O and F keys simultaneously during system boot. To set the password type password To enable the protection type setenv security-mode full An then reboot by typing reset-all Apart from the full security mode you can also set "none" (= don't ask password during boot) and "command" (=gives you only limited access to Open Firmware without the password.

Search for packages containing the word emacs in their name or description:
apt-cache search emacs
Install package emacs21:
apt-get install emacs21
Remove package wine including all configuration files:
apt-get remove --purge wine
Reinstall a package:
apt-get --reinstall install wine
Sometimes, you need to use dpkg to reconfigure a package, e.g. here the bittorrent sync package:
dpkg-reconfigure btsync