Say you want to copy a pid of a process to system clipboard, you could run
ps ax, maybe grep on the result, connect your trusty mouse and try to select the value and hit
⌘ + c.
Or you can use the amazing fuzzy finder FZF (
brew install fzf) in combination with Yank (
brew install yank).
ps ax | fzf | yank
Now simply start typing the name of the process. When you press return you will get the columns broken down into a selectable prompt - choose one and press return. It is now in your system clipboard.
Here's a demo:
This will work with any column spaced or even multiline response. Try running
ps ax | yank.