Seamlessly work across GUIs and command line with copy and paste.

.bashrc_clipboard.bash

# The clipboard provides a very convenient way to exchange data between
# different programs and is especially convenient for working with GUIs
# which can't use pipelines. Add the following function to your .zshrc /
# .bashrc:

cb() {
  # OS X: pbcopy / pbpaste
  # Cygwin: putclip / getclip
  # Linux: xclip (and others)
  if [[ ! -t 0 ]]
  then
    # Input (copy).
    xclip -sel c
  else
    # Output (paste).
    xclip -sel c -o
  fi
}

# Examples
# Check for the existence of a collection of files.
# $ ls $(cb)

# Copy the webpage at the clipboard URL.
# $ curl $(cb)|cb

# Copy the concatenate of a collection of files.
# $ cb|xargs -rd\\n cat|cb