The command $(!! |& tail -1) should do:

$ git something

The program 'git' is currently not installed. You can install it by typing:

sudo apt-get install git



$ $(!! |& tail -1)

$(git something |& tail -1)

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

git-man liberror-perl

As you can see the sudo apt-get install git command is running.

EDIT : Breaking down $(!! |& tail -1)

• $() is the bash command substitution pattern




• bash will expand !! to the last executed command




• |& part is tricky. Normally pipe | will take the STDOUT of the left sided command and pass it as STDIN to the command on the right side of |, in your case the previous command prints its output on STDERR as an error message. So, doing | would not help, we need to pass both the STDOUT and STDERR (or only STDERR) to the right sided command. |& will pass the STDOUT and STDERR both as the STDIN to the right sided command. Alternately, better you can only pass the STDERR:

  
  
  

  $(!! 2>&1 >/dev/null | tail -1)
  
  




• tail -1 as usual will print the last line from its input. Here rather than printing the last line you can be more precise like printing the line that contains the apt-get install command:

  
  
  

  $(!! 2>&1 >/dev/null | grep 'apt-get install')