Thefuck is a magnificent app which corrects your previous console command.

Thefuck is a python tool, hosted on github, which looks at your previous command and tries to correct it. You of course invoke it after a typo for instance, by typing fuck in your terminal.

A few examples in image, from the developer himself:

thefuck in action

A few more examples:

Adds sudo for you:

~> apt-get install thefuck 
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
~> fuck
sudo apt-get install thefuck [enter/↑/↓/ctrl+c]
Reading package lists... Done

Corrects your git branch syntax (this is my main use of thefuck):

~/gits/lomignet-apt> git push
fatal: The current branch newfeature has no upstream branch.
To push the current branch and set the remote as upstream, use

  git push --set-upstream origin newfeature

~/gits/lomignet-apt> fuck
git push --set-upstream origin newfeature [enter/↑/↓/ctrl+c]
Total 0 (delta 0), reused 0 (delta 0)
To git@github.com:lomignet/lomignet-apt.git
 * [new branch] newfeature -> newfeature
Branch newfeature set up to track remote branch newfeature from origin.

The installation is trivial as the package is uploaded to the python package index:

pip install thefuck

To then have the command available, add to your .bashrc or whichever your startup script is:

eval $(thefuck --alias)

In the background, thefuck has a set of known rules which you can find in the readme. If those rules are not comprehensive enough for you, you can write your own.