installation on Ubuntu 11.10
Temporary fix until Oracle fix it:
sudo add-apt-repository ppa:olivier-berten/misc sudo apt-get update sudo apt-get install mysql-workbench-gpl
Installation on Ubuntu 10.10
The official MySQL site includes DEB packages for the latest versions of both WorkBench and Ubuntu, in 32 and 64 bits:
http://www.mysql.com/downloads/workbench/#downloads
"Ubuntu Linux" in an option in the platform dropdown list.
Installation on Ubuntu 10.04 LTS - the Lucid Lynx
Download the ubuntu package from the MySQL web site
sudo apt-get install libctemplate0 libzip1 python-pysqlite2 mysql-client python-crypto python-paramiko sudo dpkg -i mysql-workbench-gpl-5.2.27-1ubu1004-i386.deb
You can check the full dependencies list by using apt-rdepends (sudo apt-get install apt-rdepends to install it)
Then, you have MySQL Workbench listed under "Applications > Programming".
Previous Ubuntu version
As of this writing (November 2009), MySQL Workbench can be easily installed on Ubuntu/Gnome. Just download the binary .deb file from the MySQL web site for workbench (currently named mysql-workbench-oss-5.1.18-1ubu904-i386.deb), save it to your home directory. Then run:
sudo apt-get install liblua5.1-0 libzip1 libmysqlclient15off python-pexpect sudo dpkg -i mysql-workbench-oss-5.1.18-1ubu904-i386.deb (adapt the name accordingly)
Then, you have MySQL Workbench listed under "Applications > Programming".