I am used to
command + k to clear up the terminal in mac. It is very helpful specially while debugging through server logs. What is the equivalent in Ubuntu system ?
Clearing the screen
This will work for both Mac OS X and *nix:
My answer assumes the default terminal emulators for bash, tcsh (default for Mac OS X) or zsh.
Deleting the scrollback buffer (more like ⌘K)
This has been asked/answered elsewhere.