- Use ! to repeat the last command typed at the keyboard. - Use ^ to replace a string from the last command with a new string. The syntax is the same as in csh: "^old-string^replacement" For example: > tell rasmusse Hi there, how are you? No-one by that name here. > ^rasmusse^rasmussen You tell Rasmussen, 'Hi there, how are you?' > ^you^you doing^ You tell Rasmussen, 'Hi there, how are you doing?'