History tricks in Bash

• ! ! - Last command
• !n - Get the "n" th command
• !-n - Get "-n" command from the current command
• !str - Get the command which matches "str"
• ^str1^str2 - Replace str1 by str2 for the last command
  

Bash - the fc command

fc is built-in shell command which you can use to check up on the most recent commands that you executed

So you do

fc -l -to list the last 16 commands that you entered

or

fc -l a -to list commands starting from any command starting with "a"

There are quite a few other options as well - try it out