There is nothing much to say other than that junegunn’s fzf is an awesome utility. It accepts a list of things and provides an interface to fuzzy-find through them. Its output is simply the string that you have selected. It’s a perfect embodiment of the ideal UNIX program – it does one thing and one thing well.

Here is a super simple example:

ps aux | fzf | awk 'print $2' | xargs kill

We are piping the output of ps aux – a list of running processes – into fzf, which allows you to fuzzy-find through them. Once you find the process that you like and hit Return, the line is piped into awk 'print $2' which grabs the PID (which is the second column, hence $2). The PID is then ultimately piped into xargs kill which results in exactly what we want: kill <PID>.

Another quick, illustrative example: vim $(find . | fzf): fuzzy-find among the files in the current working directory and edit it in Vim.

These examples are here more for illustrating the nature of fzf, and by no means bug-free. See fzf, especially the the various Examples sections, to see full-fledged, battle-hardened implementations of similar functionality.

If you are using ctrlp.vim, command-t or similar Vim plugins, check out fzf.vim.