In command line type in who or w will list all the users who are currently logged in.

To log them off type in the following:
pkill -KILL -u danny

where danny is the username. If ‘danny’ was logged in multiple times e.g locally and via ssh then both will be logged off.

Linux logout user or logoff user commands

To change the default crontab editor type in the following command:
export EDITOR=nano
Change nano for your preferred editor.

Crontab editor

I read that Ubuntu 10.04 detected the HTC Desire automatically so I tried it on my EEE PC running Ubuntu 9.10.

Plugged the USB cable in, set it to Internet Mode. a few seconds later Ubuntu reported it was connected.

Tether a HTC Desire with Ubuntu 10.04 (Lucid) via USB

In the new Ubuntu the windows manager Nautilus does not change from an icon to a text when you click on the current directory in the bread crumb. To solve this use the shortcut Ctrl + L

When I use VNC Client to remote desktop onto my Ubuntu 10.04 I got the background and maybe even the Gnome panel but the windows and programs were not appearing on the screen. However my mouse and clipboard was still working so I had ended up VNC’ing to the box and switching the display to another source.

To fix this problem just disable the visual desktop effects under System > Preferences > Appearance Under the Visual Effects tab set it to None.

VNC – remote desktop does not refresh